JPH0754006A - Production of coated semifine particle - Google Patents

Abstract

PURPOSE:To form highly controlled uniform coats on particles. CONSTITUTION:When core particles are put in a coating space and brought into contact with a coat forming material formed through a vapor phase or having the state of a vapor phase to produce coated semifine particles, core particles having Xmum average particle diameter DM and particle size distribution represented by ([DM/5, 5DM], >=90%) as frequency distribution on volume basis are dispersed Y% dispersity and brought into contact with the coat forming material. The combination of Xmum with Y% (X, Y) is (10-20, 80), (20-50, 90), (50-300, 95), (300-800, 97) or (>800, 99).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing coated quasi-fine particles and an apparatus therefor. More specifically, the present invention relates to a method for producing coated quasi-fine particles in which particles of a quasi-fine particle core particle powder or particles of a core particle powder mainly composed of quasi-fine particles are coated with a coating forming substance, and an apparatus therefor.

[0002]

2. Description of the Related Art In principle, the method of coating the surface of a powder particle with a coating forming substance such as an inorganic material or a metal material in various forms such as a film by a gas phase method is (1) Easy to control, (2) Basically, there is no limitation on the selection of the coating forming substance, and simple substance substances such as active metals, alloys,
Various types of substances such as nitrides, carbides, borides and oxides can be coated on the powder particle surface, (3) high purity substance can be coated, (4) coating amount of coating forming substance can be controlled arbitrarily There are major features such as being impossible to achieve with other coating methods.

Then, by this vapor phase method, for example, 10 μm
Highly controlled and uniform coating of particles of quasi-fine particle core particles having a particle size of more than or equal to or mainly of quasi-fine particles on the surface of individual particles over a large area There is a demand for a uniform coating in which no uncoated portion remains, and a coating in which this uniform coating does not leak to all particles. In addition, this highly controlled and uniform coating is required to have a smaller particle size and a uniform coating with less uncoated portions.

However, the highly controlled and uniform coating has not yet been achieved by various coating apparatuses and coating methods proposed as known techniques.

For example, according to the apparatus and method disclosed in Japanese Patent Application Laid-Open No. 58-31076, particles of core particle powder are put in a container installed in a PVD apparatus and the container is electromagnetically charged. The core particles in the container are vibrated by the method to roll the particles, and the core particles are coated by the PVD method. Further, according to the device disclosed in JP-A-61-30663, particles of core particle powder are put into a container installed in a PVD device, and the container is vibrated by a mechanical method. It is said that the core particles in the container can be coated by the PVD method while rolling. However, in an apparatus or method for coating while rolling the particles of the core particle powder by the vibration of these containers, in practice, the particles of the quasi-fine particle core particle powder or the core particle powder mainly composed of quasi-fine particles are The particles were slid only in the state of stacking many layers, and could not be coated in a single particle state.

The apparatus and method disclosed in Japanese Patent Laid-Open No. 153864/1993 discloses a method of depositing particles in a rotating container having a barrier and / or unevenness on the inner surface, and rotating the rotating container to form a core particle surface by vapor deposition. The purpose is to perform coating on the
The particles of the quasi-fine particle core particle powder or the particles of the core particle powder mainly composed of quasi-fine particles are in a single particle state simply by agitating lightly while many particles are in contact with each other in many layers. It could not be covered.

[0007] Japanese Patent Laid-Open No. Sho 58-141375 discloses a deposit material produced by a chemical reaction of a reaction gas by suspending a powder placed in a reaction gas atmosphere by the flow of the reaction gas and the action of gravity. Discloses a device for coating the surface of powder. Further, Japanese Patent Application Laid-Open No. 2-43377 discloses a method of performing coating by performing thermochemical reaction treatment while fluidizing particles under reduced pressure.
Further, JP-A-64-80437 discloses a method in which agglomerates of core particle powder are broken down and fluidized by low and high frequency synthetic sound waves to cover the particles. However, in the method or apparatus utilizing the fluidized bed of the particles of the quasi-fine particle core particle powder or the particles of the core particle powder mainly consisting of the quasi-fine particles by these air flows and vibrations, all the core particles are the same as a single particle. It is virtually impossible to independently flow and float in a state, and it was not possible to eliminate the uneven coating of each particle due to the shadow of the particles.

Japanese Unexamined Patent Publication No. 54-153789 discloses an apparatus for coating a metal by dropping a powder material in a vacuum container in which vapor of metal is generated. In addition, JP-A-60
-47004 discloses a method of introducing a monomer gas and powder particles into a high-frequency plasma region in a vacuum chamber and forming a coating film of an organic substance by plasma polymerization.
As with these devices or methods, the particles of the quasi-fine particle core particle powder or the particles of the core particle powder mainly composed of quasi-fine particles can be simply formed by forming aggregates which are not in a single particle state and falling by introducing them. , The shade of the particles creates uneven coating,
The particles inside the agglomerates were not coated at all, or there was a difference in the coating amount compared to the coating of single particles.

In JP-A-62-250172, as a pretreatment, powder subjected to jet mill treatment is retained in a reduced-pressure heat treatment chamber, and after heat treatment is performed therein, the powder is fed into a sputtering chamber with a powder feeder. An apparatus and a method are disclosed in which the target is introduced by natural fall and the target is naturally dropped and coated in a cylindrical sputtering chamber provided vertically. Further, in Japanese Patent Application Laid-Open No. 2-153068, as a pretreatment, powder subjected to jet mill treatment is retained in a reduced pressure heat treatment chamber, where after heat treatment is performed, a powder feeder is used to sputter the sputtering source in the sputtering chamber. There is disclosed an apparatus and a method for introducing powder in the form of powder (not single particles) into a rotating container containing therein and sputtering the container while rotating the container. In these devices and methods, there is a step of retaining the jet milled core particle powder in the heating step before coating, and due to the retention of this powder in the heating step, aggregates that are not in the single particle state are formed again. After all, in the coating process, this aggregate does not become a single particle state.

As described above, all of the conventionally known techniques have solved problems as an apparatus or method for coating particles of quasi-fine particle core particle powder or particles of core particle powder mainly composed of quasi-fine particles. Not present, particles of core particles powder of quasi-fine particles or particles of core particles powder mainly consisting of quasi-fine particles are actually subjected to coating treatment in the state of agglomerates in contact with each other,
This did not result in a highly controlled and uniform coating on each particle. That is, there has been neither a method for producing coated quasi-fine particles capable of performing highly controlled and uniform coating nor a production apparatus therefor. As a result, the above problems could not be practically resolved.

[0011]

Therefore, in reality, for example, the particles of the quasi-fine particles of which the quasi-fine particles are particles having a size of more than 10 μm or the particles of the core-particle powder mainly composed of quasi-fine particles are highly advanced. Controlled uniform coating, i.e. a uniform coating with no uncoated portion over a large area of the surface of the individual particles, and this uniform coating is required for all particles to be leak-tight. There is. In addition, for those having a large particle diameter, there is a strong demand for a method for producing coated quasi-fine particles and an apparatus therefor capable of uniform coating with a smaller number of uncoated portions.

The present invention is directed to a highly controlled and uniform coating of particles of quasi-fine core particle powder or particles of core particle powder consisting essentially of quasi-fine particles over a large area of the surface of individual particles. A uniform coating in which no uncoated portion remains, and this uniform coating is a coating in which all particles do not leak, and for particles with a large particle size, a uniform coating with less uncoated portion It is an object of the present invention to provide a method for producing coated quasi-fine particles and an apparatus therefor.

[0013]

[Means for Solving the Problems] In order to solve the above-mentioned problems, as a result of intensive studies by the present inventors, particles of a quasi-fine particle core particle powder or particles of a core particle powder mainly composed of quasi-fine particles are obtained. A highly controlled and uniform coating, i.e. a uniform coating with no uncoated portion remaining over a large area of the surface of the individual particles, and a uniform coating in which all particles are made leak-proof, Moreover, for those having a large particle diameter, in order to form a uniform coating with less uncoated portions, (1) the average particle diameter is 10 μm in the volume standard frequency distribution.
Particles of core particle powder having a particle diameter of more than 20 μm and not more than 20 μm are mainly present in the air in a single particle state. In the coating start region of the coating space in a highly dispersed state where
Or (2) a particle / gas mixture of highly dispersed core particle powder in which particles of the core particle powder having an average particle diameter of more than 20 μm and 50 μm or less in the volume-based frequency distribution mainly exist in the air in a single particle state. The particles of the core particle powder are 300 μm in the coating start region of the coating space in a highly dispersed state where the dispersity β is 90% or more, or (3) the average particle size exceeds 50 μm and 300 μm in the volume standard frequency distribution. The following core particle powder particles are mainly present in the air in the form of a single particle. Highly dispersed core particle powder particles ・ The core particle powder particles in the gas mixture have a dispersity β of 95% or more. In the coating start region of the coating space in a certain high dispersion state, or (4) in the volume standard frequency distribution, the average particle size exceeds 300 μm and the particles of the core particle powder of 800 μm or less are mainly in the single particle state in the air. Particles of highly dispersed core particles in the air / particles of core particles in a gas mixture Is mainly in the coating start region of the coating space in a highly dispersed state where the dispersity β is 97% or more, or (5) particles of the core particle powder having an average particle diameter of more than 800 μm in the volume standard frequency distribution. In the coating start region of the coating space in a highly dispersed state where the dispersity β is 99% or more, the particles of the highly dispersed core particle powder present in the air in a single particle state / the particles of the core particle powder in the gas mixture are It was found that the coating had to be started.

More specifically, (I) the particles of the core particle powder are mainly in the form of a single particle in the air. The particles of the highly dispersed core particle powder and the particles of the core particle powder in the gas mixture state are as follows: However, even if it does not stay, it tends to reaggregate mainly due to turbulent agglomeration with the passage of time, and once reaggregated, it is dispersed by a dispersion treatment means having a particularly high dispersibility like the aggregate before the dispersion treatment. If this is not done, it is difficult to break this re-aggregation state and disperse it to a high degree, that is, to re-disperse it into a single particle state of each unit. Therefore, (1) in the volume standard frequency distribution, the average particle diameter The particles of the core particle powder having a particle diameter of more than 10 μm and 20 μm or less are mainly present in the air in a single particle state. In a highly dispersed state where the ratio is 80% or more, or (2) body The average particle diameter of the reference frequency distribution 20
Particles of highly dispersed core particle powder in which particles of core particle powder having a size of more than 50 μm and less than 50 μm mainly exist in the air in a single particle state.
The degree of dispersion β of the core particles in the gas mixture is 90%.
In the high dispersion state as described above, or (3) the high dispersion in which particles of the core particle powder having an average particle size of more than 50 μm and 300 μm or less in the volume standard frequency distribution are mainly present in the air in a single particle state. The particles of the core particle powder in the gas / particle mixture of the core particle powder are in a highly dispersed state with a dispersity β of 95% or more, or (4) the volume-based frequency distribution has an average particle diameter of 300.
Particles of the core particle powder having a particle size of more than 800 μm and more than 800 μm mainly exist in the air in the form of a single particle. Is 97
% Or more in the coating start region of the coating space in a highly dispersed state, or (5) the volume-based frequency distribution has an average particle size of 800
Particles of core particle powder exceeding μm mainly exist in the air in a single particle state. Particles of highly dispersed core particle powder / particles of core particle powder in a gas mixture with a dispersity β of 99% or more. It is necessary to lead to the coating start region of the coating space in a highly dispersed state, and for that purpose, (II) the agglomerates composed of the core particle powder are destroyed and the degree of dispersion is very high according to the particle diameter. The present invention was found by the need for a dispersion treatment means group having one or more particularly high dispersion performances, which can be dispersed in the air.

That is, according to the present invention, the core particle powder is charged into the coating space, and the coating forming substance precursor and / or the gas phase state coating forming substance precursor produced through the gas phase are converted into particles of the core particle powder. In the apparatus for producing coated quasi-fine particles, which comprises contacting and / or colliding with a core particle powder, the surface of the particles of the core particle powder is coated with the coating-forming substance.
(A) Dispersing means for dispersing particles of the core particle powder in air, and (b) Low dispersion core in a mixture of particles of core particle powder and gas in which particles of the core particle powder are dispersed in air. Particles of high-dispersion core particle powder that separates the particle powder portion and particles of the core particle powder are mainly present in the air in a single particle state The low-dispersion core particle powder portion separated by the gas mixture selection means and the particle / gas mixture selection means of the high-dispersion core particle powder is the final dispersion means of the dispersion means in the quasi-fine particle high-dispersion processing means group and / or Alternatively, by means of a quasi-fine particle high dispersion treatment means group selected from a highly dispersed core particle powder particle / gas mixture selection means provided with a feedback means for conveying to a treatment means before the final dispersion means, average particles in a volume-based frequency distribution Quasi-fine core particle powder with a diameter exceeding 10 μm A dispersion step of dispersing body particles or particles of core particle powder mainly composed of quasi-fine particles in the air to form a particle / gas mixture of highly dispersed core particle powder, (B) dispersed in this dispersion step When the average particle size of the core particle powder is more than 10 μm and less than 20 μm, the dispersity β is 80% or more, and more than 20 μm and 50 μm.
When the dispersity β is 90% or more, and when the dispersity β exceeds 50 μm and is 300 μm or less, the dispersity β is 95% or more and 30
When it exceeds 0 μm and 800 μm or less, the dispersity β is 97%.
Above, and when it exceeds 800 μm, the dispersion degree β is 99
%, The coating step of contacting and / or colliding with the coating forming material precursor in the coating starting region of the coating space to start coating, is provided. It is provided.

Further, according to the present invention, in the above-mentioned method for producing coated quasi-fine particles, a core particle powder having an average particle size of more than 10 μm and 20 μm or less in a volume-based frequency distribution is subjected to the final treatment in the quasi-fine particle high dispersion treatment means group in the air. To form a particle / gas mixture of highly dispersed core particle powder, and the degree of dispersion β of the particles of the core particle powder is 80% or more, or the average particle diameter exceeds 20 μm in the volume standard frequency distribution, The core particle powder having a particle size of 50 μm or less is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to obtain a particle / gas mixture of the highly dispersed core particle powder, and the degree of dispersion β of the particles of the core particle powder is 90. % Or more,
Or, the volume-based frequency distribution has an average particle size exceeding 50 μm and 3
The core particle powder having a particle diameter of 00 μm or less is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to obtain a particle / gas mixture of the highly dispersed core particle powder, and the degree of dispersion β of the particles of the core particle powder.
Of 95% or more, or a core particle powder having an average particle diameter of more than 300 μm and 800 μm or less in a volume-based frequency distribution is dispersed in the air by the final treatment of the quasi-fine particle high-dispersion treatment means group to obtain a highly dispersed core. As a particle-gas mixture of particle powder,
A core particle powder having a particle dispersity β of 97% or more in the core particle powder or an average particle diameter of more than 800 μm in a volume-based frequency distribution is treated by a final treatment with a group of quasi-fine particle high dispersion treatment means. Particles of highly dispersed core particles powder dispersed in
As a gas mixture, the degree of particle dispersion β of the core particle powder is 9
Whether a dispersion process is performed by a group of quasi-fine particle high dispersion treatment means having a dispersion performance of 9% or more, and the particle / gas mixture of the highly dispersed core particle powder is directly discharged to the coating step by the quasi-fine particle high dispersion treatment means group. Or, between the dispersion step and the coating step, directly from the discharge part that discharges the particle / gas mixture of the highly dispersed core particle powder of the quasi-fine particle high dispersion treatment means group, or directly unavoidable for transportation, a hollow member, Highly dispersed core particle powder which is conveyed through one or more members selected from an intermediate member made of a member forming a hollow and a pipe and / or dispersed in the air with the above-mentioned dispersion performance. Particles of
In-air dispersion maintaining means for maintaining the air-dispersed state of particles in a gas mixture, the particles of highly dispersed core particle powder dispersed in air with the above-mentioned dispersion performance, and enhancing the air-dispersed state of particles in a gas mixture Air dispersion promoting means, separating low-dispersion core particle powder portion of a mixture of core particle powder particles and gas, and the core particle powder particles mainly exist in the air in a single particle state. A coating step for transporting the particles / gas mixture of highly dispersed core particle powder through one or more means for selecting particles / gas mixture of highly dispersed core particle powder It also relates to a method for producing fine particles.

Further, the present invention provides the above-mentioned method for producing coated quasi-fine particles, wherein the average particle size is 10 in volume-based frequency distribution.
A core particle powder having a particle size of more than 20 μm and more than 20 μm is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to form a particle / gas mixture of the highly dispersed core particle powder. With a degree of dispersion β of 80% or more, or a core particle powder having an average particle size of more than 20 μm and 50 μm or less in a volume-based frequency distribution, is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group. To obtain a particle / gas mixture of highly dispersed core particle powder, and the degree of particle dispersion β of the core particle powder is 90%.
Or the average particle size is 5 in the volume-based frequency distribution.
A core particle powder having a particle diameter of more than 0 μm and not more than 300 μm is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to obtain a particle / gas mixture of the highly dispersed core particle powder. Dispersity β is 95% or more, or volume-based frequency distribution has an average particle size exceeding 300 μm and 800 μm
The following core particle powder is dispersed in the air by the final treatment of the quasi-fine particle high-dispersion treatment means group, and the particles of the high-dispersion core particle powder
As a gas mixture, the degree of particle dispersion β of the core particle powder is 9
A group of quasi-fine particles high-dispersion treatment means having a dispersion performance of 7% or more, or a volume-based frequency distribution having an average particle diameter of 800 μm.
The core particle powder exceeding the above is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to form a particle / gas mixture of the highly dispersed core particle powder, and the degree of dispersion β of the particles of the core particle powder is A coating method characterized in that a part or more of the dispersion step and a part or more of the coating step by the quasi-fine particle high-dispersion processing means group having a dispersion performance of 99% or more are performed by sharing a part or more of the space. It also relates to a method for producing fine particles.

Further, in the present invention, in the above-mentioned method for producing coated quasi-fine particles, a core particle powder having a volume-based frequency distribution and an average particle diameter of more than 10 μm and 20 μm or less is subjected to the final treatment of the quasi-fine particle high dispersion treatment means group. To form a particle / gas mixture of highly dispersed core particle powder by dispersing in the air by means of a spatial region in which the degree of dispersion β of particles of the core particle powder is 80% or more, and the average particle diameter is 20 μm in the volume standard frequency distribution. The core particle powder having a particle diameter of more than 50 μm and not more than 50 μm is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to obtain a particle / gas mixture of the highly dispersed core particle powder, and the dispersion of the particles of the core particle powder. 90 degrees β
% Of the core particle powder having an average particle diameter of more than 50 μm and 300 μm or less in the spatial frequency distribution of volume standard frequency distribution in the air by the final treatment of the quasi-fine particle high dispersion treatment means group. A space region in which a particle / gas mixture of the body is used, and the degree of dispersion β of the core particle powder is 95% or more,
Volume-based frequency distribution with average particle size exceeding 300 μm 8
The core particle powder having a particle size of 00 μm or less is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to form a particle / gas mixture of the highly dispersed core particle powder, and the degree of dispersion β of the particles of the core particle powder Of core particles having an average particle size of more than 800 μm in the spatial region and volume-based frequency distribution of 97% or more are dispersed in the air by the final treatment of the quasi-fine particle high-dispersion processing means group to obtain high-dispersion core particle powder. The particle / gas mixture of the body, and the degree of dispersion β of the particle of the core particle powder is 99% or more of the highly dispersed core particle powder in the space region / the particle of the core particle powder in the gas mixture. In the space area including the surface through which all particles pass,
The coating start region of the coating space is located, or the core particle powder having an average particle size of more than 10 μm and 20 μm or less in the volume standard frequency distribution is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group. A high-dispersion core particle powder is used as a particle / gas mixture, and the degree of dispersion β of the core particle powder is 80%.
Core particle powder having an average particle size of more than 20 μm and 50 μm or less in the above spatial region and volume standard frequency distribution is dispersed in the air by the final treatment of the quasi-fine particle high-dispersion processing means group to obtain highly dispersed core particle powder. The particle size of the core particle powder is 90% or more, and the average particle size is over 50 μm and 300 μm in the volume standard frequency distribution.
The following core particle powder is dispersed in the air by the final treatment of the quasi-fine particle high-dispersion treatment means group, and the particles of the high-dispersion core particle powder
As a gas mixture, the degree of particle dispersion β of the core particle powder is 9
A core particle powder having a spatial region of 5% or more and a volume-based frequency distribution and an average particle diameter of more than 300 μm and 800 μm or less is dispersed in the air by the final treatment of the quasi-fine particle high-dispersion treatment means group to obtain a highly dispersed core. As a particle-gas mixture of particle powder,
The average particle size is 800 μm in the spatial region and volume standard frequency distribution in which the dispersity β of the particles of the core particle powder is 97% or more.
The core particle powder exceeding the above is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to form a particle / gas mixture of the highly dispersed core particle powder, and the degree of dispersion β of the particles of the core particle powder is Of the coated quasi-fine particles, the coating start region of the coating space is located in a space region including a surface through which all particles to be collected by the collection unit of the collection unit out of the space region of 99% or more. It also relates to the manufacturing method.

Further, according to the present invention, the particle size distribution of the particles of the core particle powder is a volume standard frequency distribution ([D _M / 5,5D _M ], ≧ 90%) when the average particle size is D _M. Also relates to a method for producing coated quasi-fine particles.

Further, the present invention is an apparatus for carrying out the above-mentioned method for producing coated particles, that is, a core-particle powder is charged into a coating space, and a coating-forming substance precursor and / or gas-phase state produced through a gas phase is produced. In the apparatus for producing coated quasi-fine particles, which comprises contacting and / or colliding the coating-forming substance precursor of 1 with the particles of the core particle powder to coat the surface of the particles of the core particle powder with the coating-forming substance, The final treatment means of the fine particle high dispersion treatment means group is
(A) a dispersing means for dispersing the particles of the core particle powder in the air; and (b) a low dispersion core in a mixture of the particles of the core particle powder and the gas in which the particles of the core particle powder are dispersed in the air. Particles of highly dispersed core particle powder that separates the particle powder portion and particles of the core particle powder are mainly present in the air in a single particle state. Particles of highly dispersed core particle powder that selects a gas mixture. The low dispersion core particle powder portion separated by the gas mixture selection means and the particle / gas mixture selection means of the high dispersion core particle powder is the final dispersion means of the dispersion means in the quasi-fine particle high dispersion treatment means group and / or Alternatively, by means of a group of quasi-fine particle high dispersion treatment means selected from highly dispersed core particles powder particle / gas mixture selection means provided with a feedback means for conveying to the treatment means before the final dispersion means, average particles in a volume-based frequency distribution Diameter exceeds 10 μm and 300 μm or less Dispersion processing means for dispersing particles of the quasi-fine particle core particle powder or particles of the core particle powder mainly consisting of quasi-fine particles in the air to form a particle / gas mixture of the highly dispersed core particle powder, (B) When the average particle size of the core particle powder dispersed by the dispersion treatment means is 10 μm or more and 20 μm or less, the dispersity β is 80% or more, and 20 μm or more and 50 μm.
When the dispersity β is 90% or more, and when the dispersity β exceeds 50 μm and is 300 μm or less, the dispersity β is 95% or more and 30
When it exceeds 0 μm and 800 μm or less, the dispersity β is 97%.
Above, and when it exceeds 800 μm, the dispersion degree β is 99
%, A coating chamber for contacting and / or colliding with the coating forming material precursor in the coating starting region of the coating space to start coating is provided. It is provided.

Further, according to the present invention, in the above-mentioned apparatus for producing coated quasi-fine particles, core particle powder having an average particle size of more than 10 μm and 20 μm or less in a volume-based frequency distribution is put into the air by the final treatment of the quasi-fine particle high dispersion treatment means group. Disperse it into a particle / gas mixture of highly dispersed core particle powder, and make the degree of dispersion β of the particles of the core particle powder 80% or more, or in the volume standard frequency distribution, the average particle size exceeds 20 μm and 50 μm or less. Is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to form a particle / gas mixture of the highly dispersed core particle powder, and the degree of dispersion β of the particles of the core particle powder is 90% or more. Or the volume-based frequency distribution has an average particle size of more than 50 μm and 300 μm
The core particle powder having a particle size of m or less is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to form a high-dispersion core particle powder particle.
As a gas mixture, the particle dispersity β of the core particles is 95
% Or a core particle powder having an average particle size of more than 300 μm and 800 μm or less in a volume-based frequency distribution is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to obtain a highly dispersed core particle powder. A particle / gas mixture of the body, a group of quasi-fine particle high-dispersion treatment means having a dispersibility of making the degree of particle dispersion β of the core particle powder 97% or more, or the average particle diameter exceeds 800 μm in the volume standard frequency distribution. The core particle powder is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to obtain a particle / gas mixture of the highly dispersed core particle powder, and the degree of dispersion β of the particles of the core particle powder is 99%. A processing means is provided by the quasi-fine particle high-dispersion processing means group having the above dispersion performance, and the particle / gas mixture of the highly-dispersed core particle powder generated by the final treatment of the quasi-fine particle high-dispersion processing means group From the group of distributed processing means An intermediate member consisting of a hollow member and a member for forming a hollow, which directly discharges or discharges the quasi-fine particle high-dispersion processing means group to the coating chamber having the coating space of the apparatus for producing coated quasi-fine particles. And high-dispersion core particles that are connected through one or more members selected from pipes and / or dispersed in the air with a dispersion performance-in-air dispersion of particles in a gas mixture. Air-dispersion maintaining means for maintaining the state, air-dispersion promoting means for increasing the air-dispersion state of particles in a high-dispersion core particle powder dispersed in air with dispersion performance, and core particle powder In the mixture of particles and gas, the low-dispersion core particle powder part is separated, and the particles of the core particle powder are mainly present in the air in a single particle state. High-dispersion core particle powder / particle gas mixture Also it relates to apparatus for producing a coated semi microparticles, characterized in that the one or connected through more of the selection means.

Further, the present invention is the apparatus for producing coated quasi-fine particles as described above, wherein the volume-based frequency distribution has an average particle diameter of 10
A core particle powder having a particle size of more than 20 μm and more than 20 μm is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to obtain a particle / gas mixture of the highly dispersed core particle powder. The degree of dispersion β is set to 80% or more, or core particle powder having an average particle size of more than 20 μm and 50 μm or less in a volume-based frequency distribution is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group. A high-dispersion core particle powder is used as a particle / gas mixture, and the degree of dispersion β of the particles of the core particle powder is 90% or more, or the average particle diameter is 50μ in a volume-based frequency distribution.
The core particle powder having a particle size of more than 300 m and not more than 300 μm is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to obtain a particle / gas mixture of the highly dispersed core particle powder, and the dispersion of the particles of the core particle powder. The core particle powder having a degree β of 95% or more, or a core particle powder having an average particle size of more than 300 μm and 800 μm or less in a volume-based frequency distribution is highly dispersed by the final treatment of the quasi-fine particle high dispersion treatment means group. A particle / gas mixture of the body, and the degree of particle dispersion β of the core particle powder is 97% or more, or the average particle diameter is 800 μm in the volume standard frequency distribution.
The core particle powder exceeding the above is highly dispersed by the final treatment of the quasi-fine particle high dispersion treatment means group to form a particle / gas mixture of the core particle powder, and the degree of dispersion β of the particles of the core particle powder is 99% or more. A coating process characterized in that at least a part of the dispersion treatment means including a group of quasi-fine particle high-dispersion treatment means having dispersion performance and the coating chamber are provided so as to share at least a part of the space occupied by them. It also relates to an apparatus for producing fine particles.

Furthermore, in the present invention, in the above-mentioned apparatus for producing coated quasi-fine particles, a core particle powder having a volume-based frequency distribution and an average particle size of more than 10 μm and 20 μm or less is subjected to the final treatment of the quasi-fine particle high dispersion treatment means group. To form a particle / gas mixture of highly dispersed core particle powder by dispersing in the air by means of a spatial region in which the degree of dispersion β of the core particle powder is 80% or more, and the average particle diameter is 20 μm in volume standard frequency distribution. The core particle powder having a particle diameter of more than 50 μm and not more than 50 μm is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to obtain a particle / gas mixture of the highly dispersed core particle powder, and the dispersion of the particles of the core particle powder. 90 degrees β
% Of the core particle powder having an average particle diameter of more than 50 μm and 300 μm or less in the spatial frequency distribution of volume standard frequency distribution in the air by the final treatment of the quasi-fine particle high dispersion treatment means group. A space region in which a particle / gas mixture of the body is used, and the degree of dispersion β of the core particle powder is 95% or more,
Volume-based frequency distribution with average particle size exceeding 300 μm 8
The core particle powder having a particle size of 00 μm or less is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to form a particle / gas mixture of the highly dispersed core particle powder, and the degree of dispersion β of the particles of the core particle powder Of core particles having an average particle size of more than 800 μm in the spatial region and volume-based frequency distribution of 97% or more are dispersed in the air by the final treatment of the quasi-fine particle high-dispersion processing means group to obtain high-dispersion core particle powder. The particle / gas mixture of the body, and the degree of dispersion β of the particle of the core particle powder is 99% or more of the highly dispersed core particle powder in the space region / the particle of the core particle powder in the gas mixture. In the space area including the surface through which all particles pass,
The coating start region of the coating space is located, or the core particle powder having an average particle size of more than 10 μm and 20 μm or less in the volume standard frequency distribution is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group. A high-dispersion core particle powder is used as a particle / gas mixture, and the degree of dispersion β of the core particle powder is 80%.
Core particle powder having an average particle size of more than 20 μm and 50 μm or less in the above spatial region and volume standard frequency distribution is dispersed in the air by the final treatment of the quasi-fine particle high-dispersion processing means group to obtain highly dispersed core particle powder. The particle size of the core particle powder is 90% or more, and the average particle size is over 50 μm and 300 μm in the volume standard frequency distribution.
The following core particle powder is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to obtain a particle / gas mixture of the highly dispersed core particle powder, and the degree of dispersion β of the particles of the core particle powder is 95.
% Core particles having an average particle size of more than 300 μm and 800 μm or less in a spatial region and volume standard frequency distribution,
A space region in which the particles / gas mixture of the highly dispersed core particle powder is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group, and the degree of dispersion β of the particles of the core particle powder is 97% or more, A core particle powder having a volume-based frequency distribution and an average particle diameter of more than 800 μm is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to obtain a particle / gas mixture of the highly dispersed core particle powder, The particle dispersity β of the core particle powder is 99
Of coated quasi-fine particles, characterized in that the coating start region of the coating space is located in a space region including a surface through which all particles to be recovered by the recovery unit of the recovery means out of the space region of not less than 10%. It also relates to the device.

Further, according to the present invention, the particle size distribution of the particles of the core particle powder is a volume standard frequency distribution ([D _M / 5,5D _M ], ≧ 90%) when the average particle size is D _M. Also relates to an apparatus for producing coated quasi-fine particles.

Therefore, according to the present invention, in the air,
The coating-forming substance precursor produced from the raw material of the coating-forming substance through the vapor phase by the vapor phase method, and the average particle size dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group is 10 μm.
In the coating start region of the coating space, the degree of dispersion of the particles of the core particle powder in the mixture of the highly dispersed core particle powder and the gas in the gas mixture of the highly dispersed core particle powder consisting of quasi-fine particles exceeding Β ≧ 80%, β ≧ 90%, β depending on the average particle size
The particles of the core particle powder are coated with the coating forming substance by merging in a highly dispersed state of ≧ 95%, β ≧ 97 or β ≧ 99%, and contacting and / or colliding them. In this case, the coating-forming substance precursor is one that has just been generated through a gas phase composed of atoms, molecules, ions, clusters, atomic clusters, molecular clusters, cluster ions, etc.
As such, it is in a very active state as it is during the nascent stage, and by initiating contact and / or collision with the highly dispersed core particles, the coating forming substance is firmly attached to the surface of each individual core particle in the single particle state. As a result, it is possible to produce coated particles in which the particles of the core particle powder are coated with a uniform coating forming substance in a single particle unit and the amount of each particle is coated with a uniform coating forming substance.

Before describing the present invention in detail below, terms used in the present specification will be first defined, and if necessary, specific contents of the terms will be explained.

Coated Particles Coated particles are particles that have been coated. For example, specifically, particles in which the coating forming substance is coated on the core particles in a form of one or more of ultrafine particles, islands, continuous substances, uniform films, protrusions and the like. Say.

Vapor-phase coating method The vapor-phase coating method is a method for coating a raw material of a coating-forming substance at least once in a vapor-phase state composed of one or more kinds of vacuum molecular flow, ion flow, plasma, gas, vapor and aerosol. Or a method of coating with a raw material of a coating forming substance in a gas phase.

Core Particles Core particles are particles to be coated. This is also referred to as matrix particles, seed particles or coated particles. The core particles are basically not limited in the substance constituting them, and known powder particles made of, for example, an inorganic material, a metal material, an organic material or the like can be used as the core particles.

Core particle powder The core particle powder is a powder composed of core particles. The particles of the core particle powder refer to particles constituting the core particle powder. The particles of the quasi-fine particle core particle powder used for coating in the present invention or the particles of the core particle powder mainly consisting of quasi-fine particles have an average particle diameter of more than 10 μm in volume-based frequency distribution. Preferably, when the average particle size is D _M , D _M exceeds 10 μm, and the particle size distribution is a volume-based frequency distribution ([D _M / 5,5
D _M ], ≧ 90%). In such a powder having a relatively narrow distribution width, the dispersion property or agglomeration property of the powder is characterized by the average particle size, and if the fine particle high dispersion treatment means group is operated under the condition suitable for the value of D _M. Can be dispersed. In the case of a powder having a core particle powder having an average particle diameter of more than 10 μm and having a particle size distribution of a wide distribution or a distribution having a plurality of peaks separated from each other, a suitable selective separation treatment, for example, classification treatment is preferably performed. The coating treatment of the present invention is applied to each classified powder. As a result, under the above conditions for each classified powder, the dispersity in the coating start region of the coating space is 80% or more, 90% or more in terms of the dispersity β according to the average particle size,
The coating is started in the state of 95% or more, 97% or more, or 99% or more, and it becomes possible to coat each particle of the core particle powder.

Coating-forming substance The coating-forming substance is a substance that forms a coating on an object to be coated. For example, specifically, ultrafine particles, islands,
A substance that forms a coating in the form of one or more of a continuous substance, a uniform film, and protrusions. In particular, when the form of the coating forming material is ultrafine particles, the particle size of the ultrafine particles is
It is in the range of 0.005 μm to 0.5 μm. This coating-forming substance is composed of various inorganic materials, metallic materials or organic materials which are the same as or different from the core particles, depending on the desired properties and functions of the resulting coated particles, such as oxidation. Al ₂ O ₃ , SiO ₂ , ZrO ₂ ,
Y ₂ O ₃ , CaO, MgO, MgAl ₂ O ₄ (spinel),
Si, which is a nitride such as Al ₂ SiO ₅ (mullite)
₃ N ₄ , AlN, TiN, ZrN, Si ₂ N ₂ O, HfN,
V _x N (x = 1 to 3), NbN, TaN, Ta ₂ N, BN
Etc., which are carbides such as WC, SiC, W ₂ C, HfC, T
Boron BP, TiB, TiB ₂ , ZrB ₂ , VB, V ₃ B ₂ , V such as aC, Ta ₂ C, NbC, Mo ₂ C
B ₂ , NbB, NbB ₂ , TaB, TaB ₂ , MoB, M
oB ₂ , MoB ₄ , Mo ₂ B, WB, W ₂ B, W ₂ B ₅ , La
B _6, etc. B ₁₃ P _2, a single metal, for example Si, Al, N
i, Co, Cu, Fe, Ti, W, B, Nb, V, Z
r, Hf, Ta, Re, Cr, Mo, Y, La, etc., and various intermetallic compounds and alloys such as TiA
l, Ti ₂ Al, TiAl ₃ , TiNi, NiAl, Ni
₃ Materials such as Al, composites of these materials, and epoxy resin, phenol resin, polyacrylamide resin, polyamide resin, urethane resin, polyester resin, polyvinyl chloride resin, acrylic resin, polyethylene, etc. can be used. .

Uniform coating In the case of a uniform film-forming coating material, it means that the thickness of the coating film is uniform every single particle. When the coating forming substance is in the form of ultrafine particles, islands or protrusions, it means that the coating forming substance in the form of ultrafine particles, islands or protrusions is coated in a uniform distribution. Inevitable inhomogeneities in the process of producing coating-forming substances are included in the category of uniformity.

Definition of charging into the coating space The charging into the coating space means, for example, introducing the core particle powder into the coating space by falling such as free fall. In the case of charging with carrier gas, the core particle powder is introduced by carrying it in the flow direction of the particle / gas mixture of the core particle powder, or by carrying it on the gas in the flow direction, or by changing the riding direction of the gas. It means being introduced. Alternatively, it also means to be introduced by receiving the action of a carrier gas. For example, it is introduced by a wave phenomenon of carrier gas, specifically, a non-linear wave. Alternatively, it also means introducing into the coating space by a sound wave in a gas, an ultrasonic wave, a magnetic field, an electron beam, or the like. It also means introduction by an external field such as an electric field, a magnetic field, or an electron beam. Specifically, it means that the powder particles are charged or magnetized by an electric field, a magnetic field, an electron beam or the like and introduced into the coating space by an attractive force or a repulsive force. It also includes the introduction and introduction of gas by back pressure or pressure reduction.

Coating Space The coating space is a precursor of a coating-forming substance which is produced from a raw material of a coating-forming substance through a gas phase and / or a coating-forming substance precursor in a gas phase and particles of core particle powder contact and / or Or, it means the space where it collides. Alternatively, it refers to a space region in which the surface of the particles of the core particle powder is coated with the coating forming substance.

Coating Chamber The coating chamber is a chamber which shares a part or more of the coating space. More specifically, the coating chamber is a partitioned or substantially partitioned (substantially closed or semi-closed) chamber including the coating space, and a chamber including a part or more of the coating space.

In the air, the air refers to the inside of a vacuum or a gas phase space. here,
In the present invention, the gas phase state means a state such as molecular flow, ion flow, plasma, gas, vapor, and aerosol. The vacuum is technically a reduced pressure state. Strictly speaking, gas, molecule, atom, ion, etc. are contained under any reduced pressure.

Coating Forming Substance Precursor A coating forming substance precursor is a precursor of a coating forming substance. More specifically, the raw material of the coating-forming substance in the vapor phase is formed as it is, or is formed and / or synthesized from the raw material of the coating-forming substance through the vapor phase to form the coating on the core particles which are the particles to be coated. The substance just before The coat-forming substance precursor is not limited in its state as long as it is formed and / or synthesized from the raw material of the coat-forming substance through the gas phase somewhere.
When the raw material of the coating forming substance is in the gas phase, the raw material can also be a coating forming substance precursor. The coating forming material precursor itself may be in the gas phase. It may be before the reaction, during the reaction, or after the reaction. Specific examples of the coating material precursor include ions, atoms, molecules, clusters, atomic clusters, molecular clusters, cluster ions, ultrafine particles, gas, vapor and aerosols.

Raw Material of Coating Forming Material The raw material of the coating forming material means a raw material which becomes a material which forms a coating through a gas phase. Specific examples of the form of the raw material of the coating forming substance include lumpy solids, powder particles, gas and liquid.

Dispersity β Dispersity β is an index for evaluating the dispersion performance of a powder disperser, proposed by Masuda, Goto et al. )), The ratio of the weight of particles in the apparent primary particle state to the weight of all particles is defined. Here, the particles in the apparent primary particle state are the overlap of the mass-based frequency distribution f _m2 of the powder particles in an arbitrary dispersed state and the mass-based frequency distribution f _m1 of the completely dispersed powder particles. The ratio of the part that is shown is represented by β in the following equation.

[0040]

[Equation 1] In the above equation, the unit of particle diameter (μm) is not specified.

In the above formula, the dispersity is evaluated based on the particle size distribution expressed on a mass basis, but the dispersity should be evaluated on the basis of the particle size distribution expressed on a volume basis. However, when the powder particle densities are the same, the particle size distribution expressed by mass and the particle size distribution expressed by volume are the same.
Therefore, the mass-based particle size distribution, which is practically easy to measure, is measured and used as the volume-based particle size distribution. Therefore, the original dispersion degree β is expressed by the following equation and the area of the shaded area in FIG.

[0042]

[Equation 2] In the above equation, the unit of particle size (μm) is not specified. The distribution and average particle diameter of the core particle powder are basically based on volume unless otherwise specified.

Volume-Based Frequency Distribution The volume-based frequency distribution refers to the distribution of particle diameters expressed by the volume ratio contained in a certain particle diameter.

[0044] ([D _1, D _2], ≧ 90%) Definition of ([D _1, D _2], ≧ 90%) and the distribution, D _1, the particle diameter D _2, where D ₁ <D ₂ , A distribution in which 90% or more by volume of particles of D ₁ or more and D ₂ or less is contained, and a powder composed of particles having a shaded portion ratio of 90% or more as shown in FIG. Represent

Volume-based frequency distribution ([D _M / 5,5D _M ],
Definition of ≧ 90%) The particle size distribution used in the present invention is a volume-based frequency distribution ((D _M / 5,5D _M ], ≧ 90%), and D _M is the volume-based average particle size. when, 1/5 of the particle size or less on the D _M, 90% by volume five times under particle size or less particles of D _M
It represents the distribution including the above. For example, the average particle diameter D _M is 20 μm
And the volume-based frequency distribution is ([D _M / 5,5D _M ], ≧ 90
%) Means that the volume-based average particle diameter is 20 μm and is 4 μm.
90% by volume of particles having a particle size of 100 μm or less
It represents a distribution that is included above. Here, the volume-based average particle diameter D _M is

[Equation 3]Or technically, a certain particle size interval D_i± △ D_i/ 2 (△
D_iIs the width of the partition)_iThen, D_M= Σ (v_iD_i) / Σv_i  Is expressed as

Coating start region The region where coating is started for the first time after the final treatment of the quasi-fine particle high dispersion treatment means group is called the coating start region. Therefore, even before the final treatment of the quasi-fine particle high dispersion treatment means group, the region where the coating is first started is not the coating start region in the present invention.

Dispersion degree β in coating start region In the present invention, (1) volume-based frequency distribution has an average particle size of 10
A core particle powder having a particle diameter of more than 20 μm and not more than 20 μm is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to obtain a particle / gas mixture of the highly dispersed core particle powder, and the dispersion of the particles of the core particle powder. The degree β is set to 80% or more, or (2) core particle powder having an average particle size of more than 20 μm and 50 μm or less in the volume standard frequency distribution is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group. A high-dispersion core particle powder as a particle / gas mixture, and the degree of dispersion β of the particles of the core particle powder is 90% or more, or (3) the volume-based frequency distribution has an average particle diameter of 5
A core particle powder having a particle size of more than 0 μm and not more than 300 μm is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to form a particle / gas mixture of the highly dispersed core particle powder, and the dispersion of the particles of the core particle powder. The degree β is 95% or more, or (4) the volume-based frequency distribution has an average particle size exceeding 300 μm and 800
The core particle powder having a particle diameter of μm or less is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to obtain a particle / gas mixture of the highly dispersed core particle powder, and the degree of dispersion β of the particles of the core particle powder is Or 95% or more, or (5) core particle powder having an average particle size of more than 800 μm in the volume-based frequency distribution is dispersed in the air by the final treatment of the quasi-fine particle high-dispersion treatment means group to obtain highly dispersed core particles. A coating chamber in which the coating start region of the coating space is located in a region in which the degree of dispersion β of the particles of the core particle powder is 99% or more is provided as a powder particle / gas mixture.

As far as the dispersity is in the coating start region of the above-mentioned coating space, the particles of the core particle powder are quasi-fine particles having an average particle size of more than 10 μm in the volume-based frequency distribution, or mainly quasi-fine particles. Core particles consisting of fine particles
The coating material precursor can evenly contact and / or collide with the surface of all particles of the core particle powder that can be dispersed in the air into a single particle state and pass through the coating start region of the coating space. , A uniform amount of coating-forming material can be applied to a single particle. In the quasi-fine particles having an average particle size of more than 10 μm, the dispersity β changes continuously with the average particle size of the core particle powder, but since it is difficult to express, it is expressed stepwise for convenience.

Preferably, (1) a core particle powder having an average particle size of more than 10 μm and 20 μm or less in a volume standard frequency distribution is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to obtain a highly dispersed core. A particle / gas mixture of particle powder, and the degree of particle dispersion β of the core particle powder is 90% or more, or (2) the volume-based frequency distribution has an average particle size of more than 20 μm and 5
0 μm core particle powder is dispersed in the air by the final treatment of the quasi-fine particle high-dispersion treatment means group to form particles of high-dispersion core particle powder.
As a gas mixture, the degree of particle dispersion β of the core particle powder is 9
5% or more, or (3) core particle powder having an average particle size of more than 50 μm and 300 μm or less in the volume standard frequency distribution is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to achieve high dispersion. A particle / gas mixture of the core particle powder, and the degree of dispersion β of the particles of the core particle powder is 97% or more, or (4) the core particle powder having an average particle diameter of more than 300 μm in a volume standard frequency distribution. Is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to form a particle / gas mixture of the highly dispersed core particle powder, and the degree of dispersion β of the particles of the core particle powder is 99.
It is to provide a coating chamber in which the coating start region of the coating space is located in the space region of not less than%. In the coating chamber in which the coating start region of the coating space is positioned as described above, the particles of the core particle powder have an average particle diameter of 10 in volume-based frequency distribution.
Particles of quasi-fine particle core particles having a particle size of more than μm or particles of core particle powder mainly consisting of quasi-fine particles can be more uniformly coated with a coating forming substance in a single particle unit, and each core particle can be coated. A more uniform amount of coating is possible.

Volume-based frequency distribution with an average particle size of 10 μm
Particles of quasi-fine particle core particles having a particle size of more than 50% or particles of core particle powder mainly composed of quasi-fine particles have an aggregating action in the air, and the particles are in contact with each other and / or collide with each other to obtain highly dispersed core particle powder. Non-uniform distribution of particles in the core particle powder in the body particle / gas mixture. However, if the coating is started in a dispersed state such as the degree of dispersion according to the particle size of the core particle powder, the particles of the quasi-fine particle core particle powder or the particles of the core particle powder mainly composed of quasi-fine particles The single particle unit can coat the coating forming material uniformly, and each particle can coat the coating forming material in a more uniform amount.

Semi-fine particle high dispersion treatment means group In the present invention, the semi-fine particle high dispersion treatment means group includes (A) at least one dispersion means, and (B) a final treatment means (a) Dispersing means for dispersing particles of the core particle powder in the air, or (b) a low dispersion core particle powder in a mixture of particles of the core particle powder in which the particles of the core particle powder are dispersed in the air and gas. A particle / gas mixture of highly dispersed core particle powder that separates the body part and selects the particle / gas mixture of highly dispersed core particle powder in which the particles of the core particle powder mainly exist in the air in a single particle state. The low-dispersion core particle powder portion separated by the selection means and the particle / gas mixture selection means of the high-dispersion core particle powder is the final dispersion means and / or the final dispersion means of the dispersion means in the quasi-fine particle high-dispersion processing means group. Feedback means to convey to the processing means before the final dispersion means And has a particle-gas mixture selection means e was highly dispersed core particles powder.

Preferably, (1) a core particle powder having an average particle size of more than 10 μm and not more than 20 μm in a volume-based frequency distribution is dispersed in the air by the final treatment of the quasi-fine particle high-dispersion treatment means group to obtain a highly dispersed core. The particle / gas mixture of the particle powder is used, and the dispersity β of the particles of the core particle powder is 80% or more, or (2) the volume-based frequency distribution has an average particle size of more than 20 μm and 5
The core particle powder having a particle size of 0 μm or less is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to form a particle / gas mixture of the highly dispersed core particle powder, and the degree of dispersion β of the particles of the core particle powder
Is 90% or more, or (3) core particle powder having an average particle size of more than 50 μm and 300 μm or less in the volume standard frequency distribution is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to obtain a high A particle / gas mixture of dispersed core particle powder, and the degree of dispersion β of the core particle powder is 95% or more,
Or (4) volume-based frequency distribution with an average particle size of 300 μm
The core particle powder having a diameter of more than 800 μm and not more than 800 μm is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to form a particle / gas mixture of the highly dispersed core particle powder, and the degree of dispersion of the particles of the core particle powder. β is set to 97% or more, or (5) core particle powder having an average particle size of more than 800 μm in the volume-based frequency distribution is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to achieve high dispersion. As a particle / gas mixture of core particle powder,
The core particle powder has a dispersibility in which the dispersity β of the particles is 99% or more. Corresponding to various dispersities in the coating start region, by providing a group of quasi-fine particle high dispersion treatment means having a dispersion performance equivalent to or higher than those of the dispersion start regions, a high-quality coating corresponding to each dispersity is performed in the coating start region. be able to.

Final Treatment Means When the final treatment means of the semi-fine particle high dispersion treatment means group is a dispersion means, this dispersion treatment means is referred to as the final treatment means of the fine particle high dispersion treatment means group. Also, the final processing means of the quasi-fine particle high dispersion processing means group is added to the final dispersion means of the quasi-fine particle high dispersion processing means in a low dispersion state at the time of the particle / gas mixture selective processing step of the highly dispersed core particle powder. The particles / gas mixture selection means of the highly dispersed core particle powder provided with the feedback means for conveying the selected and separated portion, or the treatment means before the final dispersion means, the particles of the highly dispersed core particle powder.・
In the case of the particle / gas mixture selecting means of the highly dispersed core particle powder, which is provided with the feedback means for conveying the selectively separated portion due to the low dispersion state in the gas mixture selection treatment step, this highly dispersed core particle powder The means for selecting a body particle / gas mixture is referred to as the final treatment means of the quasi-fine particle high dispersion treatment means group.

It should be noted that it is provided before the particle / gas mixture selecting means of the highly dispersed core particle powder, which is provided with the feedback means which is the final processing means of the quasi-fine particle high dispersion processing means group. Between the particle / gas mixture selection means of the dispersed core particle powder and the final dispersion means, or before the final dispersion means) The particle / gas mixture selection means of the highly dispersed core particle powder is fine particle height regardless of the presence or absence of the feedback means. It is a component of the distributed processing means group.

Dispersing Means The means used to disperse are called dispersing means. Those having a dispersion effect even if only a little or a little can be used as the dispersion means, and this is referred to as the dispersion means in the present invention. For example, pneumatically-used rotary feeders and injection feeders that are generally used as supply means (edited by Japan Society of Powder Engineering: “Powder Engineering Handbook”, Nikkan Kogyo Shimbun (198)
6) Since P568 and P571) also have a dispersion effect,
When used as a means for dispersion purpose, it is a dispersion means.
When the dispersion maintaining / promoting means described later is also used for the purpose of dispersion (to increase β), it becomes a dispersion means.

In the present invention, the group of means for high-dispersion quasi-fine particles include core particle powder particles dispersed by an air stream placed in an acceleration and / or velocity gradient, stationary particles of core particle powder, and / or rotating bodies. A dispersion by collision with an obstacle, a fluidized bed of particles of the core particle powder and / or a pulsating flow and / or a rotating drum and / or a mechanical disintegration consisting of vibration and / or scraping. It is equipped with one or more types of distributed mechanism.

Specifically, the quasi-fine particle high dispersion treatment means group includes an ejector type disperser, a venturi type disperser, a capillary tube,
Stirrer, Disperser that uses obstacles in the air flow, Disperser that uses jet spraying, Spiral tube, Disperser that uses rotating blades, Disperser that uses a rotating bottle (cage mill), fluidized bed type Disperser, Disperser using pulsating flow, Disperser using rotating drum, Disperser using vibration, Vibration sieve, Disperser using scraping by scraper, SA
EI, Gonell type disperser, Nakajo type disperser, Roller type disperser,
It is provided with a dispersing means composed of one or more selected from an orifice type disperser, a BM type disperser, a Timbrell type disperser, and a Wright type disperser. (Powder Engineering Society: “Powder Engineering Handbook”, Nikkan Kogyo Shimbun (1986) P430).

Further, a disperser using a stirring blade described in JP-A-56-1336, a disperser using a high-speed air stream and a dispersion nozzle described in JP-A-58-163454, and JP-A-59-199027. Disperser utilizing the dispersing action by the rotating blade and the dispersing action by plasma ions described in No.
A disperser utilizing the dispersing action of plasma ions described in JP-A-59-207319, and JP-A-59-2166.
No. 16, a disperser utilizing the dispersing action of an ejector and plasma ions, No. 59-225728, a disperser utilizing the dispersing action of an ejector and an ion flow, and No. 59-183845. Disperser utilizing the dispersing action of plasma ions of JP-A-63-1664
No. 21, a disperser utilizing a dispersing action by a dispersion blade and a pressure gas, a disperser using a line-shaped or ring-shaped slit type jet outlet described in JP-A-62-176527,
A disperser using a mesh blade described in JP-A No. 63-221829, a disperser using a dispersing action by a high-speed air stream from an injection nozzle described in JP-A No. 63-1629, No. Sho 63-9218. Described in the disperser using a large number of pores described in No. 6, the ejector type disperser described in Japanese Utility Model Publication No. 62-156854, and the disperser using the pores and orifices described in Japanese Utility Model Publication No. 63-6034. The thing of can also be used.

Dispersing means suitable for the group of means for high-dispersion quasi-fine particles include Japanese Patent Application No. 63-311358 and Japanese Patent Application No. 1-7.
The apparatus described in Japanese Patent Application No. 1071 and Japanese Patent Application No. 2-218537 can be used.

Highly-dispersed core particle powder / gas mixture selection means: Highly-dispersed core particle powder / gas mixture mainly containing particles in a single particle state among core particle powder / gas mixture Means for separating the low-dispersion core particle powder portion other than and selecting the particle / gas mixture of the high-dispersion core particle powder mainly containing particles in a single particle state. Aggregated particles, which are aggregates of primary particles, have an apparent particle diameter larger than the particle diameter of primary particles, and therefore can be separated by, for example, a dry classification means. Examples of the particle / gas mixture selecting means for the highly dispersed core particle powder include a classification means using gravity, a classification means using inertial force, a classification means using centrifugal force, a classification means using static electricity, and a flow method. Examples include dry classification means selected from one or more of classification means using layers.

Examples of means for selecting a particle / gas mixture of this highly dispersed core particle powder include a gravity classifier, inertia classifier, centrifugal classifier, cyclone, air separator, micron separator, microplex, multiplex, zigzag classification. Machine, Accu-Cut, Conical separator, Turbo classifier, Super separator, Dispersion separator, Elbow jet, Fluidized bed classifier, Virtual impactor, O-Sepa, Sieve, Vibrating screen, Shifter (Powder Engineering Society: “Powder Engineering” Engineering Handbook "Nikkan Kogyo Shimbun, P514 (1986)) and the like.

Particle / gas mixture of core particle powder The particle / gas mixture of core particle powder is (a) a homogeneous flow in which particles of the core particle powder are uniformly suspended in air (a uniform floating flow). ), (B) Inhomogeneous flow (non-homogeneous floating flow) in which particles of the core particle powder show a non-uniform distribution in a certain area in the air, (c) accompanied by a sliding layer of particles of the core particle powder Flow (sliding flow), or
(d) A flow with a stationary layer of particles of core particle powder.

Low-dispersion core particle powder particle / gas mixture Core particle powder particle / gas mixture mainly exists in the air in a state other than a single particle state. A powder particle / gas mixture.

Particle / gas mixture of highly dispersed core particle powder This is a particle / gas mixture of core particle powder in which the particles of the core particle powder mainly exist in the air in a single particle state. The particle-gas mixture of the highly dispersed core particle powder actually contains agglomerated particles, even though it is extremely highly dispersed. The particles / gas mixture of the low-dispersion core particle powder actually contains non-aggregated single particles, and the particles / gas mixture of the low-dispersion core particle powder and the particles of the high-dispersion core particle powder are selectively separated. -Divided into gas mixtures. The particle / gas mixture of the low-dispersion core particle powder becomes a particle / gas mixture of the high-dispersion core particle powder by selectively separating and / or re-dispersing the agglomerated particles.

Collecting Means The means for taking out the coated quasi-fine particles coated in the coating space is called collecting means. The part of the recovery means that performs the recovery process is called the recovery part. The coated quasi-fine particles coated by passing through the coating start region of the coating space are directly taken out from the air and collected, or taken out from the air and temporarily stored and then collected, or are collected together with the gas. . As the collecting unit of the collecting unit, a collecting unit of a collecting unit using a partition wall (obstacle), a collecting unit of a collecting unit using gravity, a collecting unit of a collecting unit using inertial force, a collecting unit using centrifugal force Collection part, collection part of collection means using attractive force due to electrification, collection part of collection means using thermophoretic force, collection part of collection means using Brownian diffusion, suction force by back pressure or decompression of gas, etc. It is possible to use the recovery unit of the recovery means used. As a preferred example of the recovery unit of this recovery means, gravity dust collector, inertial dust collector, centrifugal dust collector, filtration dust collector, electric dust collector, washing dust collector, particle packed bed, cyclone, bag filter,
Examples include ceramics filters and scrubbers.

FIG. 2A is a block diagram showing an example of the basic configuration of the quasi-particulate high dispersion processing means group of the present invention. It is composed of the final dispersion means A for dispersing the particles of the core particle powder and the constituent element d of the dispersion processing means group before the final dispersion means. ε
Is a particle / gas mixture of the highly dispersed core particle powder, which is mainly present in the air in the form of a single particle among the particles of the core particle powder.
As the constituent element d, any treatment means such as a dispersion means, a supply means, a particle / gas mixture selection means of highly dispersed core particle powder can be used alone or in combination. The component d does not necessarily have to be provided. The quasi-fine particle high dispersion treatment means group is, after the treatment of the dispersion means A, which is the final treatment means,
(1) With respect to the core particle powder having a volume-based frequency distribution and an average particle size of more than 10 μm and 20 μm or less, the dispersity is β = 80%
Or (2) the volume-based frequency distribution has an average particle size of 20
The dispersity is 90% or more in β with respect to the core particle powder of more than μm and 50 μm or less. Is 95% or more in β, or (4) the core particle powder having an average particle size exceeding 300 μm and 800 μm or less in the volume standard frequency distribution, the dispersity is 97% or more in β, or (5) the volume standard frequency distribution With respect to the core particle powder having an average particle diameter of more than 800 μm, the dispersity β can be 99% or more.

FIG. 2B is a block diagram showing another example of the basic constitution of the quasi-fine particle high dispersion treatment means group of the present invention. The final dispersing means A for dispersing the particles of the core particle powder,
To the final dispersion means A, particles of the high-dispersion core particle powder in which the particles of the core particle powder mainly exist in the air in a single particle state, and particles / gas of the low-dispersion core particle powder other than Particle / gas mixture selecting means B of the final highly dispersed core particle powder provided with a feedback means C for feeding back the mixture η,
It is composed of the constituent element d of the dispersion processing means group before the final dispersion means and the constituent element e of the quasi-fine particle high dispersion processing means group between the final dispersion means and the final selection means. [epsilon] is a particle / gas mixture of highly dispersed core particle powder, which exists in the air mainly in a single particle state among particles of the core particle powder. As the constituent element d, any processing means such as a dispersing means, a supplying means, a selecting means can be used alone or in combination. As the component e, a processing means other than the dispersion means, for example, an arbitrary processing means such as a supply means and a selection means can be used alone or in combination. The components d and e do not necessarily have to be provided.
The quasi-fine particle high-dispersion processing means group has a configuration capable of realizing the above-mentioned degree of dispersion with respect to the core particle powder having the above-mentioned average particle diameter after the processing by the selecting means B which is the final processing means.

FIG. 2C is a block diagram showing another example of the basic constitution of the quasi-fine particle high dispersion treatment means group of the present invention. The final dispersing means A for dispersing the particles of the core particle powder,
To the processing means before the final dispersing means A Low-dispersion core particle powder other than a particle / gas mixture of highly dispersed core particle powder in which the particles of the core particle powder are mainly present in the air in a single particle state Highly dispersed core particle powder particle / gas mixture selection means B provided with a feedback means C for feeding back the body particle / gas mixture η, component d of the quasi-fine particle high dispersion treatment means group before the final dispersion means, and final It is composed of the constituent element e of the quasi-fine particle high dispersion treatment means group between the dispersion means and the last selection means. [epsilon] is a particle / gas mixture of highly dispersed core particle powder, which exists in the air mainly in a single particle state among particles of the core particle powder. As the component d, a dispersion means, a supply means,
Any processing means such as selection means can be used alone or in combination. As the constituent element d, any processing means other than the dispersion means, for example, an arbitrary processing means such as a supply means and a selection means can be used alone or in combination. The components d and e do not necessarily have to be provided. The quasi-fine particle high-dispersion processing means group has a configuration capable of realizing the above-mentioned degree of dispersion with respect to the core particle powder having the above-mentioned average particle diameter after the processing by the selecting means B which is the final processing means.

Because of the above-mentioned structure, the powder supply source such as the supply tank and the core particle generating means may be included in the structure of the semi-fine particle high dispersion processing means group. For example, in the case of FIG. 2C, it goes without saying that the configuration in which the feedback destination of the feedback means C is the supply tank may be the configuration of the high dispersion processing means group. Needless to say, a crushing step of crushing and / or crushing particles of the core particle powder may be added before the dispersing step of the quasi-fine particle high dispersion treatment means group.

The basic structure of the above-mentioned quasi-fine particle high dispersion processing means group will be described in more detail with reference to a more detailed block diagram.

Structure 1 FIG. 3 (a) shows a first group of quasi-fine particle high dispersion treatment means group of the present invention.
2 is a block diagram for explaining the configuration of FIG. 2 and corresponds to FIG. This example comprises a supply tank 100 for supplying the core particle powder to be coated, and a final dispersion means A for dispersing the core particle powder to be coated. [epsilon] is a particle / gas mixture of highly dispersed core particle powder, which exists in the air mainly in a single particle state among particles of the core particle powder.

Structure 2 FIG. 3 (b) shows the second semi-fine particle high dispersion treatment means group of the present invention.
2 is a block diagram for explaining the configuration of FIG. 2 and corresponds to FIG. This example comprises a supply tank 100 for supplying the core particle powder to be coated, a dispersing means a for dispersing the core particle powder to be coated, and a final dispersing means A for dispersing the core particle powder to be coated. There is. [epsilon] is a particle / gas mixture of highly dispersed core particle powder, which exists in the air mainly in a single particle state among particles of the core particle powder.

Structure 3 FIG. 3 (c) shows a third group of quasi-fine particle high dispersion treatment means group of the present invention.
2 is a block diagram for explaining the configuration of FIG. 2 and corresponds to FIG. In this example, a supply tank 100 for supplying the core particle powder to be coated, a dispersing means a for dispersing the core particle powder to be coated, and particles of the core particle powder dispersed by the dispersing means a.
From the gas mixture, the particles / gas mixture of the low-dispersion core particle powder other than the particles / gas mixture of the high-dispersion core particle powder mainly existing in the air in a single particle state are fed back to the dispersing means a. Feedback means C, mainly particle / gas mixture of highly dispersed core particle powder for introducing the particle / gas mixture of highly dispersed core particle powder into the final dispersion means A, dispersion of core particle powder to be coated It is composed of a final dispersion means A. ε is the particle of the highly dispersed core particle powder that exists mainly in the air in the form of a single particle among the particles of the core particle powder.
It is a gas mixture.

Structure 4 FIG. 3 (d) shows a fourth example of the quasi-fine particle high dispersion treatment means group of the present invention.
2 is a block diagram for explaining the configuration of FIG. 2 and corresponds to FIG. In this example, a supply tank 100 for supplying the core particle powder to be coated, a final dispersion means A for dispersing the core particle powder to be coated, and a particle / gas mixture of the core particle powder dispersed by the final dispersion means A. Of the above, particles / gas mixture of high-dispersion core particle powder existing mainly in the air in the form of a single particle and particles / gas mixture η of low-dispersion core particle powder other than A are dispersed by means A.
It comprises a feedback means C for feeding back to, and a final particle / gas mixture selecting means B for discharging the highly dispersed core particle powder particle / gas mixture. [epsilon] is a particle / gas mixture of highly dispersed core particle powder, which exists in the air mainly in a single particle state among particles of the core particle powder.

Structure 5 FIG. 3 (e) shows the fifth semi-fine particle high dispersion treatment means group of the present invention.
2 is a block diagram for explaining the configuration of FIG. 2 and corresponds to FIG. In this example, a supply tank 100 for supplying the core particle powder to be coated, a dispersing means a for dispersing the core particle powder to be coated, a final dispersing means A for dispersing the core particle powder to be coated, and a final dispersing means. Of the low-dispersion core particle powder other than the high-dispersion core particle powder particle / gas mixture mainly existing in the air in the form of a single particle among the particle / gas mixture particles of the core particle powder dispersed in A. It comprises a feedback means C for feeding back the particle / gas mixture η to the dispersing means A, and a final particle / gas mixture selecting means B for releasing the particle / gas mixture of the highly dispersed core particle powder. There is.
[epsilon] is a particle / gas mixture of highly dispersed core particle powder, which exists in the air mainly in a single particle state among particles of the core particle powder.

Structure 6 FIG. 3 (f) shows the sixth embodiment of the quasi-fine particle high dispersion treatment means group of the present invention.
2 is a block diagram for explaining the configuration of FIG. 2 and corresponds to FIG. In this example, a low-dispersion core particle powder / gas mixture is mainly removed from the supply tank 100 for supplying the core particle powder to be coated, and a particle / gas mixture of the core particle powder is removed, and mainly high dispersion is performed. Highly dispersed core particle powder particle / gas mixture selecting means b for introducing the particle / gas mixture of the core particle powder into the dispersing means A, final dispersing means A for dispersing the particles of the core particle powder selected and separated, and finally Of the particles / gas mixture of the core particle powder dispersed by the dispersing means A, the particles / gas mixture of highly dispersed core particle powder mainly present in the air in a single particle state,
Feedback means C for feeding back particles / gas mixture η of low-dispersion core particle powder to dispersion means A, particles of high-dispersion core particle powder / final particles of high-dispersion core particle powder releasing gas mixture / It is composed of a gas mixture selecting means B. [epsilon] is a particle / gas mixture of highly dispersed core particle powder, which exists in the air mainly in a single particle state among particles of the core particle powder.

Structure 7 FIG. 3 (g) shows the seventh embodiment of the semi-fine particle high dispersion treatment means group of the present invention.
2 is a block diagram for explaining the configuration of FIG. 2 and corresponds to FIG. In this example, a supply tank 100 for supplying the core particle powder to be coated, a dispersing means a for dispersing the core particle powder to be coated, a final dispersing means A for dispersing the core particle powder to be coated, and a final dispersing means. A low-dispersion core particle powder portion other than the high-dispersion core particle powder particles / gas mixture mainly existing in the air in a single particle state from the particle / gas mixture of the core particle powder dispersed in A. It comprises a feedback means C for feeding back η to the dispersion means a, and a final particle / gas mixture selection means B for highly dispersed core particle powder, which releases the highly dispersed core particle powder particle / gas mixture. [epsilon] is a particle / gas mixture of highly dispersed core particle powder, which exists in the air mainly in a single particle state among particles of the core particle powder.

In order to maintain the highly dispersed state of the quasi-fine particles thus achieved, the air dispersion maintaining means may be added to the quasi-fine particle high dispersion treatment means group. Here, the air dispersion maintaining means refers to means for preventing reaggregation of particles of the core particle powder dispersed and carried in air to maintain the dispersity β. Further, in order to promote the highly dispersed state of the core particles thus achieved, an air dispersion promoting means can be added between the fine particle high dispersion treatment means group and the coating chamber. The air dispersion promoting means here promotes redispersion of mainly reaggregated particles among particles of the core particle powder dispersed and carried in the air, and slows down the deterioration of the dispersed state, or once decreases It means a means for promoting re-dispersion so as to recover the dispersed state to the original highly dispersed state. Suitable examples of the air dispersion maintaining means or the air dispersion promoting means include a pipe vibrating device, a pipe heating device, a plasma generating device, a charging device and the like.

The pipe vibrating device is a means for suppressing re-agglomeration and maintaining a high dispersion state by giving vibrations, which cannot be regarded as a disperser, to the particles dispersed in the air by the vibration of the pipe in which the oscillator is installed. Alternatively, it is a means for promoting the dispersion of reaggregated particles. The pipe heating device expands the carrier gas by applying heat from the outside of the carrier gas by the heated pipe, accelerates the flow velocity so that it can not be called a disperser, suppresses reaggregation, and disperses the reaggregated particles. It is a means to promote.

The plasma generator is a means for generating plasma in the air carrying the core particle powder in a dispersed state and suppressing re-aggregation by the collision of the plasma ions with the core particles to maintain a high dispersion state. It is a means of promoting the dispersion of reaggregated particles. The charging device uses a method such as corona discharge, electron beam, or radiation to generate unipolar ions in the air carrying the core particle powder, and the particles are unipolar by passing through the unipolar ion atmosphere. It is a means for suppressing re-aggregation by repulsive force of static electricity to maintain a high dispersion state or a means for promoting dispersion of re-aggregated particles.

The highly dispersed core particle powder of the quasi-fine particles thus formed is sent to the coating chamber for coating the surface of the particles with the coating forming substance. A coating space including a coating start area is provided in the coating chamber.

Although it is desirable that the quasi-fine particle high dispersion treatment means group and the coating chamber are directly connected, they may be connected by using a hollow member and / or a pipe which is inevitable for transportation. Also in this case,
It is indispensable to set the dispersion degree β in the coating start region to a value within the above range. When the quasi-fine particle high dispersion treatment means group and the coating chamber are separately placed and connected to each other, the core particle powder may be introduced into the coating chamber in the dispersed state. For that purpose, the air dispersion maintaining means and / or the air dispersion promoting means and / or the core particle powder which is an apparatus for maintaining the dispersed state of the core particle powder during this period. High-dispersion core particle powder particles that separate the low-dispersion core particle powder part from the particle-gas mixture and select the high-dispersion core particle powder particle / gas mixture that mainly contains particles in a single particle state -Gas mixture selection means can also be provided.

From the core particle powder immediately after being dispersed in the air in the quasi-fine particle high dispersion treatment means group, particles in a low dispersion state mainly composed of agglomerated particles and cores in a high dispersion state mainly composed of primary particles By connecting the quasi-fine particle high dispersion treatment means group to the coating chamber through the particle / gas mixture selection means of the highly dispersed core particle powder which selectively separates the particle powder and sends only the highly dispersed state to the coating chamber The coating treatment can be effectively performed. Further, in the present invention, the quasi-fine particle high dispersion treatment means group may share a part or more of the space with (1) the coating chamber, (2) the coating space, or (3) the coating start region.

That is, the dispersion space and the coating chamber in the quasi-fine particle high dispersion treatment means group, or the dispersion space and the coating space having the coating start region in the quasi-fine particle high dispersion treatment means group,
Alternatively, the dispersion space in the quasi-fine particle high dispersion treatment means group and the coating start region can be spatially shared. Here, the coating start region is (1) the volume standard frequency distribution and the average particle size is 1
For the core particle powder having a particle size of more than 0 μm and 20 μm or less, the particle dispersity β is 80% or more, The dispersity β of the particles is 90% or more, or (3) the core particle powder having an average particle size of more than 50 μm and 300 μm or less in the volume standard frequency distribution has a particle dispersity β of 95% or more,
(4) In the core particle powder having a volume-based frequency distribution and an average particle size of more than 300 μm and 800 μm or less, the degree of particle dispersion β
Is 97% or more, and (5) volume-based frequency distribution has an average particle size of 8
In the case of core particle powder exceeding 00 μm, the degree of particle dispersion β
And / or collision of a coating-forming substance precursor produced in the vapor phase and / or a coating-forming substance precursor in the vapor phase with a highly dispersed core particle powder conveyed in a dispersed state of 99% or more. The area where the coating is to be started, as shown in FIG.
The embodiment shown in (e) is considered.

That is, the coating start region is the region indicated by 2 in FIGS. In FIG. 4 (a),
According to the average particle diameter of the core particles, the coating start region 2 of the coating space in which the coating is started in the dispersed state of the dispersity β described above is a semi-fine particle high dispersion treatment means group or a part of the semi-fine particle high dispersion treatment means group, preferably Is provided so as to cover the emission part 1 of the quasi-fine particle high dispersion treatment means group. In FIG. 4 (b), particles 4 of the core particle powder discharged from the quasi-particulate high-dispersion processing means group or a part of the quasi-particulate high-dispersion processing means group, preferably from the discharge part 1 of the quasi-fine particle high-dispersion processing means group. Coating start region 2 of the coating space where all pass
To provide. With the above configuration, all the particles of the core particle powder are started to be coated in the dispersed state of the degree of dispersion β described above. Figure 4
In (c), the quasi-particulate high-dispersion processing means group or a part of the quasi-fine-particle high-dispersion processing means group is preferably among the particles 4 of the core particle powder discharged from the discharge part 1 of the quasi-fine particle high-dispersion processing means group. A coating start region 2 of the coating space is provided through which particles that enter the recovery unit 5 always pass. In FIG. 4D, a coating start region 2 of the coating space that surrounds the recovery unit 5 is provided. Figure 4 (e)
In the above, the recovery unit 5 is provided at a position where only the particles of the highly dispersed core particle powder and the particles of the gas mixture can reach. Therefore, the area 6 here is a selecting means utilizing gravity. The coating start region 2 of the coating space through which the particles of the highly dispersed core particle powder / particles of the gas mixture that enter the recovery section must pass is provided as shown by the hatched portion in the figure. By doing so, only the core particles that have begun to be coated in the dispersed state of the above-described dispersity β can be recovered, and the core particles that have not passed through the coating start region and the coated quasi-fine particles that have passed through the coating start region do not mix.

From the above, the apparatus for carrying out the present invention comprises the quasi-fine particle high dispersion treatment means group and the coating chamber or the quasi-fine particle high dispersion treatment means group, the coating chamber and the recovery means. The constituent elements of the device can be combined in various ways, and the configuration examples of these devices will be described below with reference to the drawings.

Device Configuration 1 FIG. 5 (a) is a block diagram illustrating the configuration of a first device for carrying out the present invention. This apparatus of this example includes a manufacturing apparatus main body 2-A of a coating apparatus, a coating chamber 2-B1, a coating space 2-B.
2, coating start region 2-B3, quasi-fine particle high dispersion treatment means group 2-C1, and recovery means 2-D. The quasi-fine particle high dispersion treatment means group 2-C1 is directly connected to the coating chamber 2-B1.

Device Configuration 2 FIG. 5 (b) is a block diagram for explaining the configuration of the second device for carrying out the present invention. This apparatus of this example includes a manufacturing apparatus main body 2-A of a coating apparatus, a coating chamber 2-B1, a coating space 2-B.
2, coating start region 2-B3, semi-fine particle high dispersion treatment means group 2-C1, unavoidable hollow member 2-C2, recovery means 2-D
It consists of Semi-fine particle high dispersion treatment means group 2-C
1 is connected to the coating chamber 2-B1 via an unavoidable hollow member 2-C2.

Device Configuration 3 FIG. 5 (c) is a block diagram for explaining the configuration of the third device for carrying out the present invention. This apparatus of this example includes a manufacturing apparatus main body 2-A of a coating apparatus, a coating chamber 2-B1, a coating space 2-B.
2, coating start region 2-B3, semi-fine particle high dispersion treatment means group 2-C1, aerial dispersion maintenance means 2-C3, recovery means 2-D
It consists of Semi-fine particle high dispersion treatment means group 2-C
1 is connected to the coating chamber 2-B1 via the air dispersion maintaining means 2-C3.

Device Configuration 4 FIG. 5D is a block diagram illustrating the configuration of a fourth device for carrying out the present invention. This apparatus of this example includes a manufacturing apparatus main body 2-A of a coating apparatus, a coating chamber 2-B1, a coating space 2-B.
2, coating start region 2-B3, quasi-fine particle high dispersion treatment means group 2-C1, and recovery means 2-D. The quasi-fine particle high dispersion treatment means group 2-C1 shares a space with the coating chamber 2-B1.

Device Configuration 5 FIG. 5 (e) is a block diagram illustrating the configuration of a fifth device for carrying out the present invention. This apparatus of this example includes a manufacturing apparatus main body 2-A of a coating apparatus, a coating chamber 2-B1, a coating space 2-B.
2, coating start region 2-B3, quasi-fine particle high dispersion treatment means group 2-C1, and recovery means 2-D. The quasi-fine particle high dispersion treatment means group 2-C1 is provided in the coating chamber 2-B1.

Device Configuration 6 FIG. 5 (f) is a block diagram illustrating the configuration of a sixth device for carrying out the present invention. This apparatus of this example includes a manufacturing apparatus main body 2-A of a coating apparatus, a coating chamber 2-B1, a coating space 2-B.
2, coating start region 2-B3, quasi-fine particle high dispersion treatment means group 2-C1, and recovery means 2-D. In the dispersion space of the quasi-fine particle high dispersion treatment means group 2-C1, the coating chamber 2
-B1 is provided.

Device Configuration 7 FIG. 5 (g) is a block diagram illustrating the configuration of a seventh device for carrying out the present invention. This apparatus of this example includes a manufacturing apparatus main body 2-A of a coating apparatus, a coating chamber 2-B1, a coating space 2-B.
2, coating start region 2-B3, quasi-fine particle high dispersion treatment means group 2-C1, recovery means 2-D, re-coating supply means 2-E. The coated quasi-fine particles after coating from the collecting means 2-D are re-coated and supplied to the high dispersion treatment means group 2-C1.
It can be conveyed by E and can be repeatedly coated. All the devices having such a configuration are included in the present invention.

The coated quasi-fine particles obtained by coating the core particle powder with the coating forming substance as described above can be coated with the coating forming substance again, or this recoating can be repeated. In this case, the coated quasi-fine particles are sent to the recoating supply means. Here, the re-coating supply means means for conveying the coated quasi-fine particles after coating to the quasi-fine particle high dispersion treatment means group for performing re-coating. Specifically, it is a means provided with (a) a collecting means for collecting the coated quasi-fine particles, and (b) a coated particle conveying means for conveying the coated quasi-fine particles from the collecting means to the quasi-fine particle high dispersion treatment means group. Alternatively, (a) a collecting means for collecting the coated quasi-fine particles, (b) a coated particle conveying means for conveying the coated quasi-fine particles from the collecting means to the quasi-fine particle high dispersion treatment means group,
(c) and means for classifying the coated quasi-fine particles after coating to classify the coated particles. When the coating amount is large, the particle size distribution of the core particle powder before coating and the particle size distribution of the coated quasi-fine particles after coating change. Therefore, it is effective to adjust the particle size distribution of the coated quasi-fine particles after coating by the coated particle classification means and perform the recoating treatment.

This recoating process can be repeated if necessary, and the coating amount of the coating forming substance can be set to a desired value. Further, this coating treatment can be repeated by changing the type of the coating forming substance, and in this way, it is also possible to multiply coat a substance of a plurality of components as a coating forming substance.

The apparatus for producing coated quasi-fine particles applied to the present invention is an apparatus for producing coated quasi-fine particles in which the coating-forming substance is coated on the particle surface of the core particle powder by a vapor phase method in which a gas phase is passed. There is no limit. For example, as a chemical vapor deposition (CVD) apparatus, a thermal CVD apparatus, a plasma CVD apparatus, a CVD (visible light CVD, laser CVD, ultraviolet CVD, infrared CVD, far infrared CVD) apparatus using electromagnetic waves, M
As the OCVD device or the like or the physical vapor deposition (PVD) device, a vacuum vapor deposition device, an ion sputtering device, an ion plating device, or the like can be applied. More specifically, for example, a particle whose surface is coated with ultrafine particles disclosed in JP-A-3-75302 and a coated particle manufacturing apparatus described in the manufacturing method thereof are suitable.

As described above, in the present invention, the particles of the quasi-fine particle core particle powder or the particles of the core particle powder mainly composed of quasi-fine particles are charged into the coating space and the precursor of the coating forming substance and // Alternatively, coated quasi-fine particles can be produced in which a coating-form substance precursor in a gas phase is brought into contact with and / or collides with the particles of the core-particle powder to coat the surface of the particles of the core-particle powder with the coating-form substance. The basic steps of the present invention are summarized as follows.

I (A) The particles of the quasi-fine particle core particle powder having an average particle diameter of more than 10 μm in the volume-based frequency distribution or the particles of the core particle powder mainly composed of quasi-fine particles are processed by the group of means for highly dispersing quasi-fine particles. A dispersion step of dispersing in air to form a particle / gas mixture of highly dispersed core particle powder, (B) a particle / gas mixture of highly dispersed core particle powder dispersed in this dispersing step, When the average particle size of the particles is more than 10 μm and less than 20 μm, the dispersity β is 80% or more, and more than 20 μm and 50
When it is less than μm, the dispersity β is 90% or more, and when it is more than 50 μm and less than 300 μm, the dispersity β is 95% or more,
When it exceeds 300 μm and 800 μm or less, the dispersion degree β is 97% or more, and when it exceeds 800 μm, the dispersion degree β is 9%.
A coating method comprising a coating step of contacting and / or colliding with a coating forming material precursor in a coating starting region of a coating space in a dispersed state of 9% or more to start coating.

II (A) Particles of quasi-fine particle core particle powder having an average particle diameter of more than 10 μm and 20 μm or less in volume-based frequency distribution or particles of core particle powder mainly composed of quasi-fine particles are subjected to a quasi-fine particle high dispersion treatment. High-dispersion core particles dispersed by means of means, core particles of a gas mixture, core particles of quasi-fine particle high-dispersion treatment means realizing a degree of dispersion β of particles of powder of 80% or more, average particles by volume-based frequency distribution Particles of highly dispersed core particle powder in which particles of quasi-fine particle core particle powder having a diameter of more than 20 μm and not more than 50 μm or particles of core particle powder mainly composed of quasi-fine particles are dispersed by a quasi-fine particle high dispersion treatment means group. -A group of quasi-fine particle high-dispersion treatment means that achieves a particle dispersity β of 90% or more in a core particle powder of a gas mixture, and a quasi-fine particle core particle powder having an average particle size of more than 50 μm and 300 μm or less in a volume-based frequency distribution Particles or mainly quasi-fine particles Particles of highly dispersed core particles obtained by dispersing the particles of the core particle powder made of (1) by means of the quasi-fine particle high dispersion treatment means group achieve a dispersity β of the particles of the core particle powder of the gas mixture of 95% or more. Quasi-fine particle high dispersion treatment means group, quasi-fine particle core particle powder particles having an average particle diameter of more than 300 μm and 800 μm or less in the volume standard frequency distribution or core particle powder mainly composed of quasi-fine particles Particles of highly dispersed core particles dispersed by the processing means group, quasi-particulate high dispersion processing means group that realizes a dispersity β of the particles of the core particle powder of the gas / gas mixture of 97% or more, averaged by volume-based frequency distribution Particle size is 8
Particles of highly dispersed core particle powder obtained by dispersing particles of quasi-fine particle core particle powder having a diameter of more than 00 μm or particles of core particle powder mainly composed of quasi-fine particles by a group of quasi-fine particle high dispersion treatment means Dispersing step of dispersing in air into a particle / gas mixture of high-dispersion core particle powder by means of a group of quasi-fine particle high-dispersion processing means that realizes a particle dispersity β of 99% or more in the particle powder, (B) When the average particle size of the particles of the highly dispersed core particle powder / the particles of the gas mixture core particle powder dispersed in this dispersion step is more than 10 μm and less than 20 μm, the dispersity β is 80% or more and more than 20 μm. When it is less than 50 μm, the dispersity β is 90% or more, more than 50 μm and 300 μm
When the dispersity β is 95% or more when it is below, and when the dispersity β is more than 300 μm and 800 μm or less, the dispersity β is 97% or more, 8
A coating method comprising a coating step of starting coating by contacting and / or colliding with the coating material precursor in the coating start region of the coating space in a dispersed state with a dispersity β of 99% or more when it exceeds 00 μm.

III (A) Quasi-fine particle high-dispersion treatment of particles of quasi-fine particle core particle powder having an average particle size of more than 10 μm and 20 μm or less in volume-based frequency distribution or core particle powder mainly composed of quasi-fine particles High-dispersion core particles dispersed by means of means / particles Core particles of gas mixture Core particles of quasi-particulate high-dispersion treatment means realizing a degree of dispersion β of 80% or more, average particles by volume-based frequency distribution Particles of highly dispersed core particle powder in which particles of quasi-fine particle core particle powder having a diameter of more than 20 μm and 50 μm or less or particles of core particle powder mainly composed of quasi-fine particles are dispersed by a group of quasi-fine particle high dispersion treatment means. -A group of quasi-fine particle high-dispersion treatment means that achieves a particle dispersity β of 90% or more in a core particle powder of a gas mixture, and a quasi-fine particle core particle powder having an average particle size of more than 50 μm and 300 μm or less in a volume-based frequency distribution Particles or mainly quasi-fine particles Particles of highly dispersed core particles obtained by dispersing the particles of the core particle powder made of (1) by the quasi-fine particle high dispersion treatment means group achieves a dispersity β of the particles of the core particle powder of the gas / gas mixture of 95% or more. Quasi-fine particle high dispersion treatment means group, quasi-fine particle core particle powder particles having an average particle size of more than 300 μm and 800 μm or less in the volume standard frequency distribution, or core particle powder mainly consisting of quasi-fine particles Particles of highly dispersed core particles dispersed by the processing means group, particles of the gas / core mixture of the gas mixture, the degree of dispersion β of the particles of the powder of the quasi-particulate high dispersion processing means group achieving 97% or more, averaged by volume-based frequency distribution Particle size is 8
Particles of a highly dispersed core particle powder obtained by dispersing particles of a quasi-fine particle core particle powder having a diameter of more than 00 μm or particles of a core particle powder mainly composed of quasi-fine particles by a group of quasi-fine particle high dispersion treatment means (B) a dispersion step of dispersing in air into a particle / gas mixture of highly dispersed core particle powder by means of a quasi-fine particle high dispersion treatment means group that realizes a particle dispersibility β of the particle powder of 99% or more; A conveying step of directly conveying the particles of the highly dispersed core particle powder / the core particle powder of the gas mixture dispersed in this dispersion step to the coating step, (C) the highly dispersed core particle powder conveyed in this conveying step Core particles of body particles / gas mixture Powder particles with an average particle size of more than 10 μm and 20 μm
When the dispersity β is 80% or more, when it is more than 20 μm and not more than 50 μm, the dispersity β is 90% or more, 50 μ or less.
When the value exceeds m and is 300 μm or less, the dispersity β is 95% or more, and when the value exceeds 300 μm and 800 μm or less, the dispersity β is 97% or more, and the dispersity β is more than 800 μm.
Of 99% or more in a dispersed state, a coating step of starting coating by contacting and / or colliding with the coating material precursor in the coating start region of the coating space.

IV (A) Particles of quasi-fine particle core particle powder having an average particle size of more than 10 μm and 20 μm or less in a volume-based frequency distribution or particles of core particle powder mainly composed of quasi-fine particles are subjected to quasi-fine particle high dispersion treatment. High-dispersion core particles dispersed by means of means, core particles of a gas mixture, core particles of quasi-fine particle high-dispersion treatment means realizing a degree of dispersion β of particles of powder of 80% or more, average particles by volume-based frequency distribution Particles of highly dispersed core particle powder in which particles of quasi-fine particle core particle powder having a diameter of more than 20 μm and not more than 50 μm or particles of core particle powder mainly composed of quasi-fine particles are dispersed by a quasi-fine particle high dispersion treatment means group. -A group of quasi-fine particle high-dispersion treatment means that achieves a particle dispersity β of 90% or more in a core particle powder of a gas mixture, and a quasi-fine particle core particle powder having an average particle size of more than 50 μm and 300 μm or less in a volume-based frequency distribution Particles or mainly quasi-fine particles Particles of highly dispersed core particles obtained by dispersing the particles of the core particle powder made of (1) by means of the quasi-fine particle high dispersion treatment means group achieve a dispersity β of the particles of the core particle powder of the gas mixture of 95% or more. Quasi-fine particle high dispersion treatment means group, quasi-fine particle core particle powder particles having an average particle diameter of more than 300 μm and 800 μm or less in the volume standard frequency distribution or core particle powder mainly composed of quasi-fine particles Particles of highly dispersed core particles dispersed by the processing means group, quasi-particulate high dispersion processing means group that realizes a dispersity β of the particles of the core particle powder of the gas / gas mixture of 97% or more, averaged by volume-based frequency distribution Particle size is 8
Particles of a highly dispersed core particle powder obtained by dispersing particles of a quasi-fine particle core particle powder having a diameter of more than 00 μm or particles of a core particle powder mainly composed of quasi-fine particles by a group of quasi-fine particle high dispersion treatment means Dispersing step of dispersing in air into a particle / gas mixture of high-dispersion core particle powder by means of a group of quasi-fine particle high-dispersion processing means that realizes a particle dispersity β of 99% or more in the particle powder, (B) The particles of the high-dispersion core particle powder and the particles of the core particle powder of the gas mixture dispersed in this dispersion step are selected from a hollow member unavoidable for transportation, an intermediate member including a member forming a hollow, and a pipe. A carrying step of carrying through one or more kinds of members, (C) the particles of the highly dispersed core particle powder and the particles of the core particle powder of the gas mixture carried in this carrying step have an average particle diameter of 20 over 10 μm
When it is less than μm, the dispersity β is 80% or more, and when it is more than 20 μm and less than 50 μm, the dispersity β is 90% or more, 5
When it is more than 0 μm and less than 300 μm, the dispersion degree β is 95
% And more than 300 μm and less than 800 μm, the dispersity β is 97% or more, and when more than 800 μm, the dispersity β is 99% or more in contact with the precursor of the coating forming material in the coating start region of the coating space. And / or a coating step of causing collision to start coating.

V (A) Particles of quasi-fine particle core particle powder having an average particle size of more than 10 μm and 20 μm or less in a volume-based frequency distribution or particles of core particle powder mainly composed of quasi-fine particles are subjected to quasi-fine particle high dispersion treatment. High-dispersion core particles dispersed by means of means, core particles of a gas mixture, core particles of quasi-fine particle high-dispersion treatment means realizing a degree of dispersion β of particles of powder of 80% or more, average particles by volume-based frequency distribution Particles of highly dispersed core particle powder in which particles of quasi-fine particle core particle powder having a diameter of more than 20 μm and not more than 50 μm or particles of core particle powder mainly composed of quasi-fine particles are dispersed by a quasi-fine particle high dispersion treatment means group. -A group of quasi-fine particle high-dispersion treatment means that achieves a particle dispersity β of 90% or more in a core particle powder of a gas mixture, and a quasi-fine particle core particle powder having an average particle size of more than 50 μm and 300 μm or less in a volume standard frequency distribution Particles or mainly quasi-fine particles Particles of highly dispersed core particles obtained by dispersing the particles of the core particle powder made of (1) by the quasi-fine particle high dispersion treatment means group achieves a dispersity β of the particles of the core particle powder of the gas / gas mixture of 95% or more. Quasi-fine particle high dispersion treatment means group, quasi-fine particle core particle powder particles having an average particle size of more than 300 μm and 800 μm or less in the volume standard frequency distribution, or core particle powder mainly consisting of quasi-fine particles Particles of highly dispersed core particles dispersed by the processing means group, particles of the gas / core mixture of the gas mixture, the degree of dispersion β of the particles of the powder of the quasi-particulate high dispersion processing means group achieving 97% or more, averaged by volume-based frequency distribution Particle size is 8
Particles of highly dispersed core particle powder obtained by dispersing particles of quasi-fine particle core particle powder having a diameter of more than 00 μm or particles of core particle powder mainly composed of quasi-fine particles by a group of quasi-fine particle high dispersion treatment means Dispersing step of dispersing in air into a particle / gas mixture of high-dispersion core particle powder by means of a group of quasi-fine particle high-dispersion processing means that realizes a particle dispersity β of 99% or more in the particle powder, (B) Particles of highly dispersed core particles powder / gas mixture core particles dispersed in this dispersion step, particles of highly dispersed core particles powder / gas mixture core dispersed in the air with this dispersion performance In-air dispersion maintaining means for maintaining in-air dispersion state of particles of particle powder, in-air dispersion promoting means for increasing in-air dispersion state of particles of core particle powder of particles / gas mixture of highly dispersed core particle powder , Core particles powder in a mixture of particles and gas, low dispersion core particles powder Highly-dispersed core particles Powder particles / gas mixture that separates particles / gas mixture, and particles of core particles powder mainly exist in the air in single particle state Highly-dispersed core particles Powder particles A carrying step of carrying through one or more kinds of gas mixture selecting means, (C) particles of the highly dispersed core particle powder carried in this carrying step, and particles of the core particle powder of the gas mixture are averaged. Particle size exceeds 10μm 20
When it is less than μm, the dispersity β is 80% or more, and when it is more than 20 μm and less than 50 μm, the dispersity β is 90% or more, 5
When it is more than 0 μm and less than 300 μm, the dispersion degree β is 95
% And more than 300 μm and less than 800 μm, the dispersity β is 97% or more, and when more than 800 μm, the dispersity β is 99% or more in contact with the precursor of the coating forming material in the coating start region of the coating space. And / or a coating step of causing collision to start coating.

In all of the above 1 to V, preferably,
Volume-based frequency distribution with average particle size exceeding 10 μm and 20 μm
Particles of highly dispersed core particle powder obtained by dispersing particles of quasi fine particle core particle powder of m or less or particles of core particle powder mainly composed of quasi fine particles by a group of quasi fine particle high dispersion treatment means Spatial region that achieves a particle dispersity β of 80% or more, a quasi-fine particle core having an average particle size of more than 20 μm and not more than 50 μm in a volume-based frequency distribution, or a quasi-fine particle core or a core mainly made of quasi-fine particles Particles of high-dispersion core particle powder in which particles of particle powder are dispersed by a group of quasi-fine particle high-dispersion processing means.
Spatial region in which the degree of dispersion β of the core particle powder of the gas mixture is 90% or more, the volume standard frequency distribution has an average particle size of more than 50 μm and 300 μm or less Particles of highly dispersed core particles obtained by dispersing particles of finely divided core particles by means of a quasi-fine particle high dispersion treatment means group.
Of 95% or more in a spatial region, volume-based frequency distribution, and average particle diameter of more than 300 μm and 800 μm or less of quasi-fine particles core particles powder or particles of core particles mainly composed of quasi-fine particles A space region in which the degree of dispersion β of the particles of the particles / gas mixture of the high-dispersion core particle powder dispersed by the high-dispersion treatment means group is 97% or more, and the average particle diameter in the volume-based frequency distribution is Particles of highly dispersed core particle powder obtained by dispersing particles of quasi-fine particle core particle powder exceeding 800 μm or particles of core particle powder mainly consisting of quasi-fine particles by a group of quasi-fine particle high dispersion treatment means Highly dispersed core particles in a space region where the degree of particle dispersion β of the particle powder is 99% or more-including a surface through which all the particles of the core particle powder in the gas mixture pass. In the space area, the coating start area of the coating space Particles of the quasi-fine particle core particle powder having an average particle diameter of more than 10 μm and 20 μm or less in the volume-based frequency distribution or particles of the core particle powder mainly composed of quasi-fine particles are treated with a quasi-fine particle high dispersion treatment means. A space region in which the degree of dispersion β of the particles of the highly dispersed core particle powder and the particles of the core particle powder of the gas mixture dispersed by the group is 80% or more,
Volume-based frequency distribution with average particle size exceeding 20 μm and 50 μm
Particles of highly dispersed core particle powder obtained by dispersing particles of quasi fine particle core particle powder of m or less or particles of core particle powder mainly composed of quasi fine particles by a group of quasi fine particle high dispersion treatment means Spatial region where the degree of dispersion β of the particles of the particle powder is 90% or more, the average particle diameter in the volume-based frequency distribution is more than 50 μm and 300 μm or less, quasi-fine particle core A space region in which the degree of dispersion β of the particles of the highly dispersed core particle powder / gas mixture of the core particle powder of the highly dispersed core particle powder in which the particles of the particle powder are dispersed by the quasi-fine particle high dispersion treatment means group is 95% or more, Particles of a quasi-fine particle core particle powder having an average particle diameter of more than 300 μm and 800 μm or less in a volume-based frequency distribution or particles of a core particle powder mainly consisting of quasi-fine particles are dispersed by a quasi-fine particle high dispersion treatment means group. Dispersed core particles Powder particles / gas A space region where the degree of dispersion β of the compound core particle powder is 97% or more, a quasi-fine particle having an average particle size of more than 800 μm in a volume standard frequency distribution, or mainly quasi-fine particles. A space region in which the degree of dispersion β of the particles of the highly dispersed core particle powder / gas mixture of the core particle powder of the highly dispersed core particle powder in which the particles of the core particle powder are dispersed by means of the quasi-fine particle high dispersion treatment means group is 99% or more. The coating start region of the coating space is located in a space region including a surface through which particles pass through all of the recovery means of the recovery means.

Alternatively, in the above I and II, preferably,
Volume-based frequency distribution with average particle size exceeding 10 μm and 20 μm
Particles of highly dispersed core particle powder obtained by dispersing particles of quasi fine particle core particle powder of m or less or particles of core particle powder mainly composed of quasi fine particles by a group of quasi fine particle high dispersion treatment means A group of quasi-fine particle high-dispersion treatment means that realizes a particle dispersity β of 80% or more, particles of a quasi-fine particle core particle powder having an average particle size of more than 20 μm and 50 μm or less in a volume-based frequency distribution, or mainly Particles of core particle powder composed of quasi-fine particles are dispersed by means of a quasi-fine particle high dispersion treatment means group. Achievement of quasi-fine particle high-dispersion treatment means group, average particle diameter exceeding 50 μm in volume-based frequency distribution 3
Particles of highly dispersed core particle powder obtained by dispersing particles of quasi-fine particle core particle powder having a diameter of 00 μm or less or particles of core particle powder mainly composed of quasi-fine particles by a group of quasi-fine particle high dispersion treatment means A group of quasi-fine particle high-dispersion treatment means that achieves a particle dispersity β of 95% or more, a particle of quasi-fine particle core particle powder having an average particle size of more than 300 μm and 800 μm or less in a volume-based frequency distribution, or mainly Particles of highly dispersed core particle powder obtained by dispersing particles of core particle powder composed of quasi-fine particles by means of a quasi-fine particle high dispersion treatment means group have a degree of dispersion β of 97% or more Realized quasi-fine particle high-dispersion treatment means group, average particle diameter of 800μ in volume-based frequency distribution
Particles of a highly dispersed core particle powder in which particles of a quasi-fine particle core particle powder exceeding m or particles of a core particle powder mainly composed of quasi-fine particles are dispersed by a group of quasi-fine particle high dispersion treatment means Part of the dispersion process of dispersing particles in the air to form a particle-gas mixture of highly dispersed core particle powder by means of a quasi-fine particle high dispersion treatment means group that realizes a particle dispersibility β of the particle powder of 99% or more. And a part or more of the coating step are performed by sharing a part or more of the space.

The invention will now be described in more detail by way of examples.

Embodiment 1 Hereinafter, a detailed description will be given based on the embodiment of the present invention shown in FIG. 6 as a specific example of the apparatus having the configuration shown in FIG. 5A and its partially enlarged view of FIG. 7. ..

The apparatus of this example comprises a plasma torch 3-A, a plasma chamber 3-a, and a cooling tank 3 for the coating-formation-material precursor producing chamber.
-B, coating forming substance precursor generation chamber 3-b, narrowly-defined coating chamber cooling tank 3-C, narrowly-defined coating chamber 3-c, coating quasi-fine particle cooling chamber cooling tank 3-D, coating quasi-fine particle cooling chamber 3 -D, a supply device 3-E1 on the supply side of the raw material of the coating forming substance, a stirring type dispersion machine 3-F1 and an ejector type dispersion machine 3-H1, a capillary tube dispersion machine 107 and a coating on the supply side of the core particle powder. The quasi-fine particle recovery unit 3-G. The supply device 3-E1 is connected to the supply tank 112 for the raw material powder of the coating-forming substance, and the stirring-type disperser 3-F1 is connected to the supply device 111 equipped with the supply tank for the core particle powder. By definition, the coating chamber in this example is composed of a plasma chamber 3-a, a coating forming substance precursor generation chamber 3-b, a coating chamber 3-c in a narrow sense, and a coating quasi-fine particle cooling chamber 3-d. These are called a coating room in a broad sense. Of the coating chambers in the broad sense, the chamber 3-c in which the coating process is mainly performed is called the coating chamber in the narrow sense.

This semi-fine particle high dispersion treatment means group α comprises a feeder 111 having a feed tank, a stirring type dispersing machine 3-F1, an ejector type dispersing machine 3-H1 and a stainless steel thin tube dispersing machine 107 having an inner diameter of 4 mm. This is the structure of the quasi-fine particle high dispersion treatment means group in FIG. 2 (a). The quasi-fine particle high dispersion treatment means group has a D _M = 40 μm ([D _M / 5,5D _M ], ≧ 9.
It is configured such that β ≧ 90% can be achieved at the time of output for 0%) powder. The thin tube 107, which is the final processing means of the quasi-fine particle high dispersion processing means group, is directly connected to the coating chamber 3-C, and D _M = 40 μm ([D _M / 5,5D _M ], ≧ 90%)
It is configured so that β ≧ 90% can be realized for the powder of

The plasma torch 3-A has, for example, an inner diameter of 4
A quartz tube having a length of 4 mm and a length of 200 mm is mainly used, a coil for high-frequency oscillation is attached to the outside, and a jacket tube for cooling is provided on the outside. On the upper part of the plasma torch 3-A, a gas ejection port 101 whose ejection direction is tangential, axial and radial is provided. At the bottom of the plasma torch 3-A, a supply port 104 for the raw material of the coating forming material is provided.
The powder of the raw material of the coating forming substance supplied from the feeder 112 equipped with the supply tank of the raw material of the coating forming substance is the carrier gas 1.
It is a structure which is carried by 03 and introduced into the plasma flame.

The coating material precursor producing chamber 3-b comprises a quartz tube having an inner diameter of 120 mm and a length of 200 mm, and a cooling outer tube 3-B outside the quartz tube. The covering chamber 3-c in a narrow sense is composed of an inner tube having an inner diameter of 120 mm and a length of 100 mm and an outer jacket tube 3-C for cooling the outer tube. In the narrowly-defined coating chamber 3-c, the core particles supplied from the feeder 111 equipped with the core particle powder supply tank are the stirring type disperser 3-F1 and the ejector type disperser 3.
-H1 and a fine particle high-dispersion treatment means group α composed of a fine tube disperser 107 and dispersed from a core particle powder supply port provided in the central portion of the coating chamber 3-c in a narrow sense. . The coating space 3-L2 and the coating start region of the coating space are provided in the coating chamber 3-c in a narrow sense. The coated quasi-fine particle cooling chamber 3-d is a tube 1 having an inner diameter of 440 mm and a length of 800 mm.
16 and a cooling mantle 3-D on the outside thereof. The outlet 109 of the coated quasi-fine particle collecting unit 3-G is connected to a vacuum pump so that the coated quasi-fine particles are collected on the filter 110 and taken out.

With the apparatus for producing coated quasi-fine particles according to the embodiment of the present invention, diamond particles having a distribution of D _M = 40 μm ([D _M / 5,5D _M ], ≧ 90%) were obtained as core particle powder particles. The particles of the quasi-fine particle powder were coated with silicon oxide as a coating forming substance. Argon gas is supplied at a rate of 20 liters / minute from the supply source 102 to the gas ejection port 101 provided at the upper part of the plasma torch 3-A. The argon gas is turned into plasma by the applied high frequency, and forms a plasma flame in the plasma chamber 3-a in the plasma torch 3-A.

The silicon oxide powder, which is the raw material of the coating forming substance, supplied from the feeder 112 equipped with the supply tank of the raw material of the coating forming substance is carried on the carrier gas 103 of 5 liter / min, and the plasma torch 3- From the inlet 104 for the raw material of the coating forming substance provided in the lower part of A, it is introduced into the plasma flame at a rate of 0.5 g / min, is evaporated by the heat of the plasma flame, and the precursor chamber for forming coating substance 3- It is rapidly cooled and condensed in b to become a coating material precursor.

Feeder 111 equipped with a supply tank for core particle powder
The core particles of diamond supplied at 1.5 g / min from the above are dispersed by the stirring type disperser 3-F1 and carried by the carrier gas 105 supplied at a rate of 5 l / min, and the flow rate is 10 l / min. Ejector Disperser 3-H1 and Capillary Disperser 107
To disperse in the air.

A feeder 111 having the feeding tank of this embodiment,
Stirring Disperser 3-F1 and Ejector Disperser 3-H1
The quasi-fine particle high-dispersion processing means group α constituted by the fine tube disperser 107 has a volume-based frequency distribution of D _M = 40 μm.
m ([D _M / 5,5D _M ], ≧ 90%) distribution of particles of the core particle powder is treated with a fine tube disperser 107 which is a final treatment means.
The degree of dispersion β can be dispersed to 94%. Further, in the coating start region 3-L1 of the coating space, coating is started in the dispersed state with the dispersion degree β = 94%.

The coated quasi-fine particles having their surfaces coated with the coating-forming substance, which have been generated in this manner, move down together with the gas in the coated quasi-fine particle cooling chamber 3-d, and the coated quasi-fine particle recovery section 3-G.
Leading to. The product composed of the coated quasi-fine particles is separated from the gas by the filter 110, collected, and taken out.

Observation of the obtained coated quasi-fine particles, that is, the diamond quasi-fine particles whose surface was coated with silicon oxide, by a scanning electron microscope revealed that as shown in FIG. It was an ultrafine particle coated with silicon.

Comparative Example An apparatus having the same configuration as the apparatus used in this Example except that the dispersing means was not provided and the quasi-fine particle powder was introduced directly from the feeder 111 into the coating chamber 3-c. Using the same diamond quasi-fine particle powder used in this example,
It was coated with the coating forming material silicon oxide. The dispersion degree β of the quasi-fine diamond particles at the inlet to the coating chamber was 75%. The obtained coated particles, that is, the quasi-fine particles of diamond whose surface was coated with silicon oxide, were observed by a scanning electron microscope. As shown in FIG. 9, the silicon oxide-coated diamond in which silicon oxide was not partially coated was observed. Only quasi fine particles were obtained.

Example 2 The apparatus shown in FIG. 10 and its partially enlarged view shown in FIG. 11 is one specific example of the apparatus having the configuration shown in FIG. 5 (d).

The structure of the apparatus for producing the coating material precursor of this example is the same as that of the first embodiment. The quasi-fine particle high dispersion treatment means group α is composed of a feeder 214 having a feed tank, a stirring type dispersing machine 5-F1, a narrow tube dispersing machine 211, and a dispersing machine 5-H2 using a collision plate, as shown in FIG. It is an example of the constitution of the quasi-fine particle high dispersion treatment means group of (a). Capillary disperser 21
1 is made of stainless steel with an inner diameter of 4 mm. The disperser 5-H2 using a collision plate, which is the final dispersion means of the quasi-fine particle high dispersion treatment means group α, has a structure in which a collision plate 213 made of SiC is installed by a holder 212 made of stainless steel. The dispersion machine 5-H2 using this collision plate is a coating chamber 5-c in a narrow sense.
And the coating chamber 5-c in a narrow sense have a common space. Also,
Covering space 5-L1 and coating start region 5-L2 of the covering space
Is provided in the narrowly-defined coating chamber 5-c. According to the quasi-fine particle high-dispersion processing means group of the present apparatus, as the volume-based frequency distribution, D _M = 200 μm ([D _M / 5,5D _M ], ≧ 90
%) Particles of the core particle powder corresponding to the distribution, the collision plate 21 of the disperser 5-H2 using the collision plate which is the final dispersion treatment.
Immediately after the collision, No. 5 can be dispersed to a dispersity β ≧ 95%. Therefore, the coating is started in the state of the dispersity β ≧ 95%.

With the apparatus for producing coated quasi-fine particles of this example, the volume-based average particle diameter D _M = 2 as the particles of the core particle powder.
Particles of a quasi-fine particle powder of aluminum oxide having a distribution of 00 [mu] m ([D _M / 5,5D _M ], ≧ 90%) were coated with metallic aluminum as a coating forming substance. Plasma torch 5
The gas supply port 201 is provided on the upper part of -A
Supply 2 to 20 liters / minute of argon gas. The argon gas is turned into plasma by the applied high frequency, and forms a plasma flame in the plasma chamber 5-a inside the plasma torch 5-A.

The metal aluminum powder as the raw material of the coating forming material, which was supplied at 0.5 g / min from the feeder 215 equipped with the supply tank of the raw material of the coating forming material, was carried on the carrier gas 203 at 5 liters / minute. , Plasma torch 5-A
Feeding port 204 for the raw material of the coating forming material provided at the bottom of
Is introduced into the plasma flame, evaporated by the heat of the plasma flame, and rapidly cooled and condensed in the coating forming substance precursor generating chamber 5-b to become the coating forming substance precursor.

Feeder 214 equipped with a supply tank for core particle powder
Aluminum oxide core particles supplied at a rate of 2.0 g / min from the above are dispersed by a stirring type disperser 5-F1 and carried by a carrier gas 205 supplied at a rate of 20 liters / min. After that, it is dispersed in the air to a dispersion degree β = 97% by a disperser 5-H2 using a collision plate. The core particles dispersed in the coating chamber are dispersed in the coating start region 5-L1 of the coating space 5-L2 to have a dispersity β = 97.
Start coating with a% dispersion. The thus-produced coated quasi-fine particles whose surface is coated with a coating-forming substance,
Along with the gas, the coated quasi-fine particle cooling chamber 5-d descends to reach the coated quasi-fine particle recovery section 5-G. The product composed of the coated quasi-fine particles is separated from the gas by the filter 210 and collected and taken out.

The obtained coated quasi-fine particles, aluminum oxide quasi-fine particles whose surface was coated with metallic aluminum, were:
Observation with a scanning electron microscope reveals that individual aluminum oxide quasi-fine particles, which are primary particles, are coated with metallic aluminum. The coating morphology was similar to that obtained in Example 1.

Example 3 The apparatus shown in FIG. 12 and a partially enlarged view of FIG. 13 is one specific example of the apparatus having the configuration shown in FIG. 5 (b).

The structure of the apparatus for producing the coating material precursor of this example is the same as that of the first embodiment. The quasi-fine particle high dispersion treatment means group α includes a feeder 313 having a supply tank, a stirring type dispersing machine 6-F1 which is a dispersing means, and a cyclone 6-I which is a means for selecting a particle / gas mixture of highly dispersed core particle powder. And is an example of the configuration of the block diagram of FIG. The discharge part of the particles / gas mixture of the high-dispersion core particle powder of the cyclone 6-I is connected to the coating chamber 6-c in a narrow sense by a pipe 307 which is inevitable for transportation, and the particles of the low-dispersion core particle powder / The discharge portion of the gas mixture is provided with a carrier pipe 310 through a hopper 6-J and a rotary valve 6-K, and a stirring type disperser 6 is used.
-Connected to F1. According to the quasi-fine particle high dispersion treatment means group of this apparatus, D _M = 15 as the volume-based particle size distribution.
of [mu] m ([D _M / 5,5D _M], ≧ 90%) of the particles in the powder of core particles corresponding to the distribution, release of the highly dispersed core particles in the cyclone 6-I which is the final processing means powder stream And the degree of dispersion β ≧
It can be dispersed to 90%. As shown in the drawing, the coating space 6-L2 and the coating start region 6-L1 of the coating space are provided in the coating chamber 6-c in a narrow sense.
Is provided. The decrease of the dispersion degree β due to the unavoidable pipe 307 due to the restriction of the flange portion connecting 6-C and 6-D can be limited. Therefore, in the coating start region, the coating starts with the dispersity β ≧ 80%.

With the apparatus for producing coated quasi-fine particles of this example, as particles of the core particle powder, D _M = 15 μm ([[D _M / 5,5
5D _M ], ≧ 90%) of cubic boron nitride quasi-fine grain powder particles were coated with metallic aluminum as a coating forming substance. Argon gas was supplied from the supply source 302 to the gas jet port 301 provided on the upper portion of the plasma torch 6-A.
Supply in liters / minute. This argon gas is turned into plasma by the applied high frequency, and the plasma torch 6-
A plasma flame is formed in the plasma chamber 6-a in A.

Metallic aluminum powder, which is a raw material of the coating forming material, was supplied at 0.5 g / min from a feeder 314 equipped with a supply tank of the raw material of the coating forming material, and was supported on a carrier gas 303 of 5 liters / minute. , Plasma torch 6-A
Feeding port 304 for the raw material of the coating forming material provided at the bottom of the
Is introduced into the plasma flame, evaporated by the heat of the plasma flame, and rapidly cooled and condensed in the coating forming substance precursor generation chamber 6-b to become the coating forming substance precursor.

Feeder 313 equipped with a supply tank for core particle powder
The cubic boron nitride core particles supplied at a rate of 1.7 g / min from 1 to 30 g are dispersed by the stirring type disperser 6-F1 and carried by the carrier gas 305 at 15 liters / min.
It is conveyed to cyclone 6-I via 6. The cyclone 6-I is adjusted so that the maximum particle size on the fine powder side is 20 μm, and the particle / gas mixture of the highly dispersed core particle powder mainly containing single particles flows through the pipe 307 which is inevitable for transportation. Through the discharge port 308, it is discharged to the coating chamber 6-c in a narrow sense. On the other hand, the particle / gas mixture-dispersed core particle powder flow of the low-dispersion core particle powder mainly composed of agglomerated particles selectively separated by the cyclone 6-I is passed through the hopper 6-J and the rotary valve 6-K to obtain 10 liters. Carrier gas 309 / min
Is carried in the pipe 310 by the stirring type dispersing machine 6-F.
Give feedback to 1. The degree of dispersion of the particles / gas mixture of the cyclone 6-I highly dispersed core particle powder, which is the discharge portion from the quasi-fine particle high dispersion treatment means group α, is the dispersion degree β = 90%, The degree of dispersion in the coating start region 6-L1 is β = 85%. The thus-produced coated quasi-fine particles whose surface is coated with a coating-forming substance,
Along with the gas, the coated quasi-fine particle cooling chamber 6-d descends to reach the coated quasi-fine particle recovery unit 6-G. The product composed of the coated quasi-fine particles is separated from the gas by the filter 312, collected and taken out.

The obtained coated quasi-fine particles, which were cubic boron nitride quasi-fine particles whose surface was coated with metallic aluminum, were observed by a scanning electron microscope. It is coated with aluminum. The coating form was the same as in Example 1.

[0130]

According to the method and apparatus for producing coated quasi-fine particles of the present invention, individual particles can be coated even if they are particles of quasi-fine particle core particle powder or particles of core particle powder mainly composed of quasi-fine particles. It became possible to coat the substance, and there was no longer the generation of uncoated particles or particles with uncoated particles by forming coated agglomerates in which the surface of the agglomerates was coated with a coating-forming substance. As a result, uncoated core particles or core particles having an uncoated portion do not exist, and the merit in industrial production is extremely large.

[Brief description of drawings]

FIG. 1 is a distribution chart of powder particles, (a) shows the original dispersity β, and (b) shows the distribution of particles having a particle size range of D _{1 to} D ₂ occupying 90% by volume. Represents particle size vs. volume based frequency.

2A to 2C are block diagrams showing a basic configuration of a quasi-fine particle high dispersion treatment means group.

3 (a) to 3 (g) are block diagrams for explaining the configuration of a quasi-fine particle high dispersion treatment means group in more detail.

FIGS. 4A to 4E are views showing a mode in which coating of core particle powder is started. FIG.

5A to 5G are block diagrams illustrating the configuration of the device of the present invention.

FIG. 6 is a diagram showing an apparatus of Example 1.

FIG. 7 is a partially enlarged view of the device according to the first embodiment.

8 is a scanning electron micrograph of coated quasi-fine particles obtained by the apparatus of Example 1. FIG.

FIG. 9 is a scanning electron micrograph of coated quasi-fine particles obtained in a comparative example.

FIG. 10 is a diagram showing an apparatus of Example 2.

FIG. 11 is a partially enlarged view of the device according to the second embodiment.

FIG. 12 is a diagram showing an apparatus according to a third embodiment.

FIG. 13 is a partially enlarged view of the device according to the third embodiment.

Claims (5)

[Claims] 1. A core-particle powder is put into a coating space, and a coating-forming substance precursor and / or a gas-phase coating-forming substance precursor produced through a gas phase are brought into contact with the particles of the core-particle powder. And / or colliding to coat the surface of the particles of the core particle powder with the coating forming substance, in the method for producing coated quasi-fine particles,
(A) Dispersing means for dispersing the particles of the core particle powder in the air, and (b) Low dispersion in a mixture of the particles of the core particle powder and the gas in which the particles of the core particle powder are dispersed in the air. Highly dispersed core particle powder particles that separate the core particle powder part and select the particle / gas mixture of highly dispersed core particle powder in which the particles of the core particle powder mainly exist in the air in a single particle state. The gas dispersion selection means and the particles of the highly dispersed core particle powder, and the low dispersion core particle powder portion selectively separated by the gas mixture selection means are the final dispersion means of the dispersion means in the quasi-fine particle high dispersion treatment means group. And / or feedback means for conveying to the processing means before the final dispersing means, particles of highly dispersed core particle powder,
The average particle diameter is 10 μm in the volume-based frequency distribution by means of the quasi-fine particle high dispersion treatment means group selected from the gas mixture selecting means.
a dispersion step of dispersing particles of the quasi-fine particle core particle powder exceeding m or particles of the core particle powder mainly consisting of quasi-fine particles into the air to form a particle / gas mixture of the highly dispersed core particle powder; The particles of the core particle powder dispersed in this dispersion step have a dispersity β of 80% or more when the average particle size is more than 10 μm and 20 μm or less, and a dispersity β of 90 when the average particle size is more than 20 μm and 50 μm or less.
% And more than 50 μm and less than 300 μm, the dispersity β is 9
When the dispersity β is 97% or more when it is 5% or more and 300 μm or more and 800 μm or less, and the dispersity β is 99% or more when it is more than 800 μm, it is in contact with the coating material precursor in the coating start region of the coating space. And / or a coating step of causing collision to start coating, and a method for producing coated quasi-fine particles. 2. The volume-based frequency distribution has an average particle diameter of 10 μm.
A core particle powder having a particle size of more than 20 μm and not more than m is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to obtain a particle / gas mixture of the highly dispersed core particle powder. High-dispersion treatment means group for quasi-fine particles having a dispersibility β of 80% or more, or a core particle powder having an average particle diameter of more than 20 μm and 50 μm or less in a volume standard frequency distribution. Quasi-particulate high-dispersion treatment means having a dispersibility in which the particle / gas mixture of the highly-dispersed core particle powder is dispersed in the air by the final treatment of the above, and the degree of dispersion β of the particles of the core-particle powder is 90% or more. Core particles having a mean particle size of more than 50 μm and not more than 300 μm in a group or volume-based frequency distribution are dispersed in the air by the final treatment of the quasi-fine particle high-dispersion treatment means group to form particles of high-dispersion core particle powder. As a gas mixture, the core particle powder Quasi particle group of means for high dispersion treatment with a dispersion capability of the dispersity β of 95% or more of the particles, or beyond the average particle size of 300μm by volume frequency distribution 8
The core particle powder having a particle size of 00 μm or less is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to form a particle / gas mixture of the highly dispersed core particle powder, and the degree of dispersion β of the particles of the core particle powder Of 97% or more for the quasi-fine particle high dispersion treatment means having a dispersion performance, or the volume-based frequency distribution has an average particle diameter of 8
The core particle powder having a particle size of more than 00 μm is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to obtain a particle / gas mixture of the highly dispersed core particle powder, and the degree of dispersion β of the particles of the core particle powder. Particles of high-dispersion core particles which are dispersed by means of a group of quasi-fine particle high-dispersion treatment means having a dispersion performance of 99% or more.
The gas mixture is directly discharged to the coating step, or between the dispersion step and the coating step, from the discharge part for discharging the particle / gas mixture of the highly dispersed core particle powder dispersed by the quasi-fine particle high dispersion treatment means group, It is conveyed through one or more members selected from a hollow member, an intermediate member composed of a member for forming a hollow, and a pipe, which is unavoidable for carrying, and / or dispersed in the air with the above-mentioned dispersion performance. Air-dispersion maintaining means for maintaining the air-dispersed state of particles in a particle / gas mixture of highly dispersed core particle powder, particles / gas of highly-dispersed core particle powder dispersed in air with the above-mentioned dispersion performance In-air dispersion promoting means for increasing the air-dispersed state of particles in the mixture, in the mixture of particles and gas of the core particle powder, the low-dispersion core particle powder portion is separated, and the particles of the core particle powder are Highly dispersed core particles mainly present in the air in the form of single particles Highly dispersed core particles for selecting a powder particle / gas mixture A transfer step is provided for transferring the powder / particle mixture through one or more kinds of powder particle / gas mixture selecting means. Method for producing coated quasi-fine particles. 3. The volume-based frequency distribution has an average particle size of 10 μm.
A core particle powder having a particle size of more than 20 μm and not more than m is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to obtain a particle / gas mixture of the highly dispersed core particle powder. High-dispersion treatment means group for quasi-fine particles having a dispersibility β of 80% or more, or a core particle powder having an average particle diameter of more than 20 μm and 50 μm or less in a volume standard frequency distribution. Quasi-particulate high-dispersion treatment means having a dispersibility in which the particle / gas mixture of the highly-dispersed core particle powder is dispersed in the air by the final treatment of the above, and the degree of dispersion β of the particles of the core-particle powder is 90% or more. Core particles having a mean particle size of more than 50 μm and not more than 300 μm in a group or volume-based frequency distribution are dispersed in the air by the final treatment of the quasi-fine particle high-dispersion treatment means group to form particles of high-dispersion core particle powder. As a gas mixture, the core particle powder Quasi particle group of means for high dispersion treatment with a dispersion capability of the dispersity β of 95% or more of the particles, or beyond the average particle size of 300μm by volume frequency distribution 8
The core particle powder having a particle size of 00 μm or less is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to form a particle / gas mixture of the highly dispersed core particle powder, and the degree of dispersion β of the particles of the core particle powder Of 97% or more for the quasi-fine particle high dispersion treatment means having a dispersion performance, or the volume-based frequency distribution has an average particle diameter of 8
The core particle powder having a particle size of more than 00 μm is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to obtain a particle / gas mixture of the highly dispersed core particle powder, and the degree of dispersion β of the particles of the core particle powder. Characterized in that a part or more of the dispersion step and a part or more of the coating step by the quasi-fine particle high dispersion treatment means group having a dispersion performance of 99% or more are performed by sharing a part or more of the space. The method for producing coated quasi-fine particles according to claim 1. 4. The volume-based frequency distribution has an average particle size of 10
A core particle powder having a particle size of more than 20 μm and more than 20 μm is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to obtain a particle / gas mixture of the highly dispersed core particle powder. Spatial region where dispersity β is 80% or more, average particle size exceeds 20 μm in volume standard frequency distribution 50
The core particle powder having a particle size of μm or less is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to obtain a particle / gas mixture of the highly dispersed core particle powder, and the degree of dispersion β of the particle of the core particle powder
Of 90% or more, the average particle size exceeds 50 μm in the volume-based frequency distribution, and 30
The core particle powder having a particle size of 0 μm or less is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to form a particle / gas mixture of the highly dispersed core particle powder, and the degree of dispersion β of the particles of the core particle powder Of 95% or more, the volume-based frequency distribution has an average particle size of more than 300 μm and 8
The core particle powder having a particle size of 00 μm or less is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to form a particle / gas mixture of the highly dispersed core particle powder, and the degree of dispersion β of the particles of the core particle powder Of 97% or more in a space region, and a core particle powder having an average particle size of more than 800 μm in a volume-based frequency distribution is dispersed in the air by the final treatment of the quasi-fine particle high-dispersion treatment means group to obtain a highly dispersed core particle powder. Particles of a highly dispersed core particle powder / particles of a core particle powder in a gas mixture in a spatial region where the degree of dispersion β of the particles of the core particle powder is 99% or more as a body particle / gas mixture. The coating start region of the coating space is located in the space region including the surface through which all the particles pass, or the average particle diameter is 10 in the volume standard frequency distribution.
A core particle powder having a particle size of more than 20 μm and more than 20 μm is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to obtain a particle / gas mixture of the highly dispersed core particle powder. Spatial region with dispersity β of 80% or more, volume-based frequency distribution with average particle size exceeding 20 μm and 50 μm
The core particle powder having a particle size of m or less is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to obtain a particle / gas mixture of the highly dispersed core particle powder, and the degree of dispersion β of the particles of the core particle powder is 90
% Or more in the spatial region, and the average particle size in the volume standard frequency distribution exceeds 50 μm and is 30
The core particle powder having a particle size of 0 μm or less is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to form a particle / gas mixture of the highly dispersed core particle powder, and the degree of dispersion β of the particles of the core particle powder
Of 95% or more, the volume-based frequency distribution has an average particle size of more than 300 μm and 8
The core particle powder having a particle size of 00 μm or less is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to form a particle / gas mixture of the highly dispersed core particle powder, and the degree of dispersion β of the particles of the core particle powder Of 90% or more in a spatial region, and a core particle powder having an average particle size of more than 800 μm in a volume-based frequency distribution is dispersed in the air by the final treatment of the quasi-fine particle high dispersion treatment means group to obtain a highly dispersed core particle powder. In the space area including the surface through which all particles to be recovered by the recovery unit of the recovery means pass, in the space area in which the degree of dispersion β of the particles of the core particle powder is 99% or more. The method for producing coated quasi-fine particles according to claim 1, 2 or 3, wherein a coating start region of the coating space is positioned. 5. The particle size distribution of the powder of core particles of particles, when the average particle diameter is D _M, by volume frequency distribution ([D _M /
5,5D _M ], ≧ 90%), The method for producing coated quasi-fine particles according to claim 1, 2, 3 or 4.