CN108190848B - It is a kind of multistage fragmentation, particle screen selecting prepare compound powder method - Google Patents
It is a kind of multistage fragmentation, particle screen selecting prepare compound powder method Download PDFInfo
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- CN108190848B CN108190848B CN201810028799.3A CN201810028799A CN108190848B CN 108190848 B CN108190848 B CN 108190848B CN 201810028799 A CN201810028799 A CN 201810028799A CN 108190848 B CN108190848 B CN 108190848B
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- C01B21/00—Nitrogen; Compounds thereof
- C01B21/06—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron
- C01B21/0632—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron with gallium, indium or thallium
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- C01B21/00—Nitrogen; Compounds thereof
- C01B21/06—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron
- C01B21/072—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron with aluminium
- C01B21/0722—Preparation by direct nitridation of aluminium
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Abstract
The invention discloses a kind of multistage fragmentations, the method for particle screen selecting prepare compound powder, heat to source metal, become liquid；Multistage fragmentation processing is carried out to the source metal of liquid, forms fine metal drop；Fine metal drop is screened, fine metal drop is imported into compound reaction system；Fine metal drop is reacted with reaction gas, fine metal drop is made to be converted to compound crystal grain；By compound crystal grain fragmentation, reduces crystal grain and reunite and gather；Compound crystal grain is cooled into compound powder；Compound powder screening, Electrostatic Absorption processing；Superfine powder staticizes, deposits, collection is handled.It is small that the present invention has the advantages that high-efficient, at low cost and environment influences, made compound powder powder material then has purity is high and particle is small, the characteristics such as uniform, it efficiently solves and synthesizes the problems such as infusible compound powder material particles are big, and reaction is incomplete, insufficient using traditional method.
Description
Technical field
The present invention relates to a kind of PM techniques more particularly to a kind of multistage fragmentation, particle screen selecting to prepare chemical combination
The method of object powder.
Background technique
The compound-material of infusibility has important use in various fields because of its distinctive physical features and working characteristics,
Such as automobile, metallurgy, electronics, chemical industry etc..By taking nitrogen compound as an example, boron nitride (BN) can be used as lubricant resistant to high temperature, cut
Cut tool and crucible material etc.；Titanium nitride (TiN) is a kind of ceramic material for having extreme hardness, is commonly used as coating material；Nitrogen
Change aluminium (AlN) because its is nontoxic non-conductive and have with the comparable thermal conductivity of copper, be in packaging of photoelectric device it is optimal insulation, dissipate
Hot material；Gallium nitride (GaN) based alloy is the main material of blue laser and high-brightness LED device.
It, cannot be using conventional earthenware since compound-material has the characteristic of superelevation fusing point, ultrahigh hardness and extremely low ductility
The traditional handicrafts such as crucible fusing, moulding by casting and thermo-mechanical processi are processed, can only be using the methods of powder metallurgy.Infusibilized
In the processing and manufacturing for closing object material, the preparation of powder is the key that entire industrial chain.The production of known infusible compound powder
Method includes: carbothermic method, self-propagating combustion, mechanical milling method and sol-gal process etc..These processing methods remove cost
High outer, infusible compound powder produced also contains serious pollution and impurity from raw material, handling implement and container etc..
Traditional, single aerosolization method is widely used to production metal powder.Using the gas sources such as nitrogen, argon gas as
Molten metal is broken into tiny molten drop by Alevaire, these tiny molten drops are further condensed into tiny
Solid metal powder, but the molten drop or particle that generate by it are larger, and it is complete, adequately infusibilized to be difficult synthetic reaction
Close object material.
Summary of the invention
Technical problem to be solved by the present invention lies in: how molten metal to be broken into finer molten metal
Drop provides a kind of method of multistage fragmentation, particle screen selecting prepare compound powder.
The present invention be by the following technical programs solution above-mentioned technical problem, the present invention the following steps are included:
(101) source metal is heated, becomes liquid；
(102) multistage fragmentation processing is carried out to the source metal of liquid, forms fine metal drop；
(103) fine metal drop is screened, fine metal drop is imported into compound reaction system；
(104) fine metal drop is reacted with reaction gas, fine metal drop is made to be converted to compound crystal grain；
(105) it by compound crystal grain fragmentation, reduces crystal grain and reunites and gather；
(106) compound crystal grain is cooled into compound powder；
(107) compound powder screening, Electrostatic Absorption processing；
(108) superfine powder staticizes, deposits, collection is handled.
As one of preferred embodiment of the invention, in the step (101), source metal in gallium, aluminium, indium or silicon one
Kind is a variety of.
As one of preferred embodiment of the invention, in the step (102), it is atomized using multistage pressure by tiny liquid
Metal is atomized into fine molten drop step by step.
Multistage pressure is atomized the high-pressure atomization equipment of specially level-one or more or by multiple high-pressure atomization integration of equipments one
The single equipment of body.Liquid metal is atomized step by step, keeps molten drop smaller and smaller.Atomization plant can for gas atomization equipment,
Ultrasonic atomizatio equipment.
As one of preferred embodiment of the invention, in the step (103), by certain driving air-flow round, adjust air pressure and
The fine metal drop of screening is imported into compound reaction system by airflow direction.Control imports the size of gas pressure, air-flow
Direction, screen specific fine metal drop, change the direction of fine metal droplet flow.The gas is nitrogen or argon
Gas.
Compound reaction system is the reacting furnace that spherical or top and the bottom are hemispherical, middle section is cylinder.Reaction
Furnace inner wall smooth, no angle.
As one of preferred embodiment of the invention, in the step (104), reaction gas is methane or reaction gas
It is at least one of ammonia, nitrogen.
As one of preferred embodiment of the invention, in the step (105), in the bottom and top of compound reaction system
Multiple air-flow rounds for being used to import reaction gas are set, are added in the bottom outside of compound reaction system for driving chemical combination
The particle vibrator that object crystal grain moves up and down.
One or more mixed reaction gas are imported by air-flow round, the inner wall along compound reaction system is blown up and down
It sweeps；Meanwhile the reaction gas flow that the round of compound reaction system bottom introduces, change the direction and speed that compound crystal grain falls
Degree, and rotate compound crystal grain from top to bottom and from bottom to top.The particle vibrator of compound reaction system bottom outside is compeled
Move up and down compound crystal grain.
Air-flow round is straight hole or inclined hole, is uniformly distributed as annular.Size, the structure of air-flow round determine to import reaction gas
Flow, flow velocity and its direction of flowing of body.Thus, these equally distributed air-flow round control compound crystal grains fall, revolve
The rate turned and direction, move compound crystal grain ceaselessly, reduce reunion, the aggregation phenomenon of compound crystal grain.Meanwhile increasing
Reaction gas and the chance for reacting insufficient or incomplete metal component and contacting, react, synthesizing.
Particle vibrator is specially mechanical vibrator, ultrasonic vibrator.It is exported in external particle vibrator and air-flow round
Reaction gas collective effect under, compound crystal grain is seethed up and down, is rotated left and right, phase mutual friction/hit in reaction system
It hits, accelerates the fragmentation of compound crystal grain, reduce the reunion of compound crystal grain, gather.In addition, make compound reaction more sufficiently,
Completely.
As one of preferred embodiment of the invention, in the step (106), by being arranged in compound cooling chamber wall portion
Airflow channel between inside and outside layer is cooled down using inner wall of the common nitrogen to compound cooling chamber, using high-purity or
Ultra-pure nitrogen cools down to the inside of compound cooling chamber, and compound crystal grain is converted to compound powder.
It is evenly distributed using the airflow channel of multiple thread shapes, and it is welded on the inside and outside layer of compound cooling chamber wall portion
Between.The low inert gas of use cost (nitrogen), uniformly the shell of cooling cooling chamber, avoids water or steam indoor to cooling
The osmosis pollution of compound crystal grain or powder.
As one of preferred embodiment of the invention, in the step (107), compound powder after cooling by screening and
Electrostatic Absorption processing, biggish powder particle slowly falls, is classified according to the standard of setting, and smaller or fine chemical combination
Object powder floats with air-flow to be staticized into superfine powder, deposits, collecting treatment process.
As one of preferred embodiment of the invention, in the step (108), superfine powder staticizes, deposits, collection is handled
Processing carried out in the high pressure stainless steel hermetically sealed can of vacuum.The inner wall smooth of hermetically sealed can, without angle, be not easy adhesion compounds powder
End.In addition, compound powder is collected under safety condition, vacuum environment, stores.
As one of preferred embodiment of the invention, the compound powder is nitrogen base, oxygroup, hydrogen-based, carbon-based, chloro, fluorine
Base, boryl, sulfur-based compound material.
It is small that the present invention has the advantage that there is the present invention high-efficient, at low cost and environment to influence compared with prior art
Advantage, made compound powder powder material then has purity is high and particle is small, the characteristics such as uniform, efficiently solves using traditional
Method synthesis infusible compound powder material particles it is big, react it is incomplete, insufficient the problems such as.
Detailed description of the invention
Fig. 1 is preparation flow figure of the invention；
Fig. 2 is the preparation flow figure of embodiment 1；
Fig. 3 is the preparation flow figure of embodiment 2；
Fig. 4 is the preparation flow figure of embodiment 3；
Fig. 5 is the preparation flow figure of embodiment 4.
Specific embodiment
It elaborates below to the embodiment of the present invention, the present embodiment carries out under the premise of the technical scheme of the present invention
Implement, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to following implementation
Example.
As shown in Figure 1, the process of prepare compound powder of the present invention is as follows:
(101) source metal is heated, participates in the source metal of reaction as one or more kinds of metals.
For two or more source metals, then ratio is set as needed, is liquefied before atomization, forms liquid metal mixing
Object is then carried out multistage pressure atomization.For example, according to the ratio of setting composition a variety of source metals can before atomization quilt
Liquefaction, and import in a source metal crucible, form mixed metal liquid.
In addition, can also individually carry out liquefaction and multistage atomizing for two or more source metals, then make institute active
Metal superfine molten drop inputs simultaneously according to set amount, is reacted jointly with reaction gas.For example, in atomization process,
Multiple spray heads, spout are provided, by controlling each spray head, the pressure of spout air inlet, flow velocity and the flow of liquid metal, adjust liquid
The atomization quantity of state metal makes it generate the compound particle (crystal grain) of stoichiometric(al).
The heating means of source metal are specially resistance heating or electromagnetic induction heating.It is required that heating temperature is higher than source metal
Melting temperature, to reduce the viscosity of liquid metals and provide enough heats, to promote chemical reaction that can go on smoothly.
In addition, carrying out heating to source metal makes its liquefied process, need to carry out under vacuum conditions, keeps constant temperature, and
With inert gas (nitrogen, argon gas) protection, it is ensured that do not polluted by foreign gas in liquid metal source.
(102) canister of a constant temperature is set, and multistage pressure atomizer is located at the top of the canister of constant temperature, leads to
Diversion pipe is crossed, multistage pressure atomizer is communicated with source metal crucible.The heating means of canister are resistance heating, electromagnetic induction
Heating.Heating temperature is higher than the melting temperature of source metal, constant temperature is kept, to reduce the viscosity of metal liquid and ensure its flowing
Property, it is recycled convenient for molten metal.Meanwhile should be avoided because temperature is excessively high, generate infusible compound substance.
When multistage pressure atomization process, multistage, step by step high-pressure atomization are executed, passes through control high-pressure nozzle, spout air inlet
The number of flow and liquid metal, making tiny molten drop gradually becomes fine molten drop.Meanwhile using inert gas
(nitrogen or argon gas) protects high-pressure nozzle, spout, it is ensured that high-pressure nozzle, spout are not blocked.
High-pressure atomizer is at least one of aerosolization device and ultrasonic atomizer；Aerosolization device and ultrasonic atomizer can be with
Series combination uses, and the fine metal drop after high pressure gas atomization makes its fragmentation fine metal drop by ultrasonic atomizatio.
(103) on the inner wall of thermostat metal container, equally distributed certain driving air-flow round is set, the gas of importing is lazy
Property gas (nitrogen or argon gas).Using the gas of importing, small in size, light-weight fine metal drop is filtered out, by fine
Molten drop channel drives fine metal drop to enter compound reaction system；The setting of fine metal drop channel is being driven
The opposite of air-flow round；And larger, heavier molten drop falls to the bottom of thermostat metal container, waits to be recycled, mist again
Change.Flow, the flow velocity that gas is imported by control are adjusted into the size, how many of compound reaction system fine metal drop.
In the outside of thermostat metal container bottom, liquid material recovery port is set, passes through the liquid material recovery port, liquid material export, weight
New atomization.
(104) after fine molten drop imports compound reaction system, it is allowed to be reacted with reaction gas, fine
Molten drop is converted into compound crystal grain.The temperature of reaction system adjusts in the range of reaction temperature of compound, makes it smoothly
It is converted into compound crystal grain.The reaction gas for participating in reaction is one or more kinds of gases.
(105) it executes crystal grain fragmentation and increases reaction chance, reduce and reunite and gather processing, in compound reaction system
Multiple air-flow rounds are arranged in top, bottom plate, and particle vibrator is arranged in the outside of compound reaction system bottom.Pass through air-flow
Round, the reaction gas of importing, the inner wall along compound reaction system purge up and down；Meanwhile compound reaction system bottom
Air-flow round, the air-flow of introducing change the direction and speed that compound crystal grain falls, and make compound crystal grain from top to bottom and by
Lower and upper rotation.In addition, the particle vibrator of compound reaction system bottom outside, forces compound crystal grain to move up and down.Cause
This, compound crystal grain rolling, phase mutual friction/collision up and down in reaction system, or ceaselessly rotate, keep compound crystal grain broken
Change, increases the reaction chance for reacting insufficient metal component, be conducive to the reaction and synthesis of compound.Meanwhile reducing chemical combination
The reunion of object crystal grain with gather.
(106) compound is cooled into compound powder, and in the synthesis process of compound crystal grain, a large amount of heat is (outer
Portion and itself generation) it participates, therefore, (change when compound crystal grain imports cooling system by compound reaction system
Close object cooling chamber) when, compound crystal grain itself carries thermal energy.In cooling procedure, the method used is gas circulating cooling, and
Use inert gas (nitrogen) as cooling medium.Cooling system is internally provided with the airflow channel of thread shape, makes gas edge
The airflow channel of threaded form uniformly cools down this cooling system, when compound crystal grain passes through this cooling system center, drops to it
Temperature, solidification, make compound crystal grain be rapidly converted to compound powder (particle).
(107) compound powder screening, Electrostatic Absorption processing are executed, compound powder after cooling passes through screening and electrostatic
Adsorption treatment, biggish powder particle are slowly fallen, and according to the standard (granularity) of setting, are classified, and lesser or fine
Compound powder float with air-flow and enter superfine powder and staticize, deposit, collect treatment process.
(108) superfine powder staticizes, deposits, collection is handled, and the processor is by a high pressure stainless steel hermetically sealed can and correlation
Detect instrument composition.It is worked normally to ensure, maintains the pressure staticized, in deposition processor less than the pressure of classifier outlet
Power.The collection of superfine powder is being perfectly safe, is carrying out under vacuum condition, avoid superfine powder leak and foreign matter gas
Body pollution.
By adjusting source metal, reaction gas, metal condensing temperature and reaction temperature etc., many different types can be generated
Compound powder, such as nitrogen base, oxygroup, hydrogen-based, carbon-based, chloro, fluorine-based, boryl, sulfur-based compound material etc..
Embodiment 1
As shown in Fig. 2, the present embodiment is used to prepare gallium nitride powder material, detailed process is as follows:
(201) pure metal gallium is heated under vacuum conditions, heating temperature is higher than 29.78 DEG C, becomes gallium metal
Liquid；Inert gas nitrogen or argon gas participate in protection, prevent foreign matter gaseous contamination；
(202) multistage pressure atomization is carried out to the gallium of liquid, forms it into tiny gallium drop；
(203) driving gas, air-flow are imported, smaller, lighter fine gallium drop is driven to enter compound reaction system, and
Larger, heavier gallium drop falls to the canister bottom of constant temperature, wait it is to be recycled, be atomized again.The driving gas used is
Nitrogen or argon gas；
(204) it uses high-purity ammonia and nitrogen as reaction gas, is reacted with fine gallium drop, make fine gallium
Drop is converted into gallium nitride crystal grain, reaction equation are as follows:
2Ga+N2=2GaN
2Ga+2NH3=2GaN+3H2
(205) it executes crystal grain fragmentation and increases reaction chance, reduce and reunite and gather, equally distributed air flue or gas are set
Hole and particle vibrator import reaction gas, change gallium nitride crystal grain whereabouts, the flow velocity of flowing and direction；Meanwhile forcing nitridation
Gallium crystal grain moves up and down, rotates left and right, phase mutual friction/shock, makes the fragmentation of gallium nitride crystal grain, increases touch opportunity, reduces and reunite
With gather；
(206) gas circulating cooling processing is carried out to gallium nitride crystal grain, becomes gallium nitride powder；
(207) screening of gallium nitride powder material, Electrostatic Absorption processing, by screening filtering, Electrostatic Absorption processing, to delay
Under gallium nitride powder classified, collected, and superfine or fine gallium nitride powder enter staticize, deposit, at collection
Reason；
(208) using staticize, sedimentation handles the gallium nitride powder of superfine, then be perfectly safe, vacuum
Under the conditions of it be collected, store.
Embodiment 2
As shown in figure 3, the present embodiment is used to prepare aluminum nitride powder powder material, detailed process is as follows:
(301) pure metallic aluminum is heated under vacuum conditions, heating temperature is higher than 660.4 DEG C, becomes aluminum metal
Liquid；Inert gas nitrogen or argon gas participate in protection, prevent foreign matter gaseous contamination；
(302) multistage pressure atomization is carried out to the aluminium of liquid, forms it into tiny molten aluminum drop；
(303) driving gas, air-flow are imported, drives smaller, lighter fine molten aluminum to be dripped and enters compound reaction system, and
Larger, heavier molten aluminum, which is dripped, drops down onto the canister bottom of constant temperature, wait it is to be recycled, be atomized again.The driving gas used is
Nitrogen or argon gas；
(304) it uses high-purity ammonia and nitrogen as reaction gas, is reacted with fine molten aluminum drop, make fine aluminium
Drop is converted into aluminum nitride grain, reaction equation are as follows:
2Al+N2=2AlN
2Al+2NH3=2AlN+3H2
(305) it executes crystal grain fragmentation and increases reaction chance, reduce and reunite and gather, equally distributed air flue or gas are set
Hole and particle vibrator import reaction gas, change aluminum nitride grain whereabouts, the flow velocity of flowing and direction；Meanwhile forcing nitridation
Aluminium grain is moved up and down, is rotated left and right, phase mutual friction, hitting, and is made aluminum nitride grain fragmentation, is increased touch opportunity, reduces and reunite
With gather；
(306) gas circulating cooling processing is carried out to aluminum nitride grain, becomes aluminium nitride powder；
(307) screening of aluminum nitride powder powder material, Electrostatic Absorption processing, by screening filtering, Electrostatic Absorption processing, to delay
Under aluminium nitride powder classified, collected, and superfine or fine aluminium nitride powder enter staticize, deposit, at collection
Reason；
(308) using staticize, sedimentation handles the aluminium nitride powder of superfine, then be perfectly safe, vacuum
Under the conditions of it be collected, store.
Embodiment 3
As shown in figure 4, the present embodiment is used to prepare indium nitride dusty material, detailed process is as follows:
(401) pure metal indium is heated under vacuum conditions, heating temperature is higher than 156.61 DEG C, becomes indium metal
Liquid；Inert gas nitrogen or argon gas participate in protection, prevent foreign matter gaseous contamination；
(402) multistage pressure atomization is carried out to the indium of liquid, forms it into tiny indium drop；
(403) driving gas, air-flow are imported, smaller, lighter fine indium drop is driven to enter compound reaction system, and
Larger, heavier indium drop falls to the canister bottom of constant temperature, wait it is to be recycled, be atomized again.The driving gas used is
Nitrogen or argon gas；
(404) it uses high-purity ammonia and nitrogen as reaction gas, is reacted with fine indium drop, make fine indium
Drop is converted into indium nitride crystal grain, reaction equation are as follows:
2In+N2=2InN
2In+2NH3=2InN+3H2
(405) it executes crystal grain fragmentation and increases reaction chance, reduce and reunite and gather, equally distributed air flue or gas are set
Hole and particle vibrator import reaction gas, change indium nitride crystal grain whereabouts, the flow velocity of flowing and direction；Meanwhile forcing nitridation
Indium moves up and down, rotates left and right, phase mutual friction/shock, makes indium nitride fragmentation, increases touch opportunity, reduces and reunite and gather；
(406) gas circulating cooling processing is carried out to indium nitride, becomes indium nitride powder；
(407) screening of indium nitride dusty material, Electrostatic Absorption processing, by screening filtering, Electrostatic Absorption processing, to delay
Under indium nitride powder classified, collected, and superfine or fine indium nitride powder enter staticize, deposit, at collection
Reason；
(408) using staticize, sedimentation handles the indium nitride powder of superfine, then be perfectly safe, vacuum
Under the conditions of it be collected, store.
Embodiment 4
As shown in figure 5, the present embodiment is used to prepare carborundum powder powder material, detailed process is as follows:
(501) pure metal silicon is heated under vacuum conditions, heating temperature is higher than 1410 DEG C, and silicon metal is made to become liquid
State；Inert gas nitrogen or argon gas participate in protection, prevent foreign matter gaseous contamination；
(502) multistage pressure atomization is carried out to the silicon of liquid, forms it into tiny silicon liquid drop；
(503) driving gas, air-flow are imported, drives smaller, lighter fine silicon liquid to be dripped and enters compound reaction system, and
Larger, heavier silicon liquid, which is dripped, drops down onto the canister bottom of constant temperature, wait it is to be recycled, be atomized again.The driving gas used is
Nitrogen or argon gas；
(504) it uses high-purity ammonia and nitrogen as reaction gas, is reacted with fine silicon liquid drop, make fine silicon
Drop is converted into silicon carbide, reaction equation are as follows:
Si+CH4=SiC+2H2
(505) execute fragmentation and increase reaction chance, reduce reunite and gather, be arranged equally distributed air flue or stomata and
Particle vibrator imports reaction gas, changes silicon carbide whereabouts, the flow velocity of flowing and direction；Meanwhile silicon carbide being forced to be jumped up and down
Dynamic, left rotation and right rotation, is hit at phase mutual friction, is made silicon carbide fragmentation, is increased touch opportunity, reduces and reunite and gather；
(506) gas circulating cooling processing is carried out to silicon carbide, becomes silicon carbide powder；
(507) screening of carborundum powder powder material, Electrostatic Absorption processing, by screening filtering, Electrostatic Absorption processing, to delay
Under silicon carbide powder classified, collected, and superfine or fine silicon carbide powder enter staticize, deposit, at collection
Reason；
(508) using staticize, sedimentation handles the silicon carbide powder of superfine, then be perfectly safe, vacuum
Under the conditions of it be collected, store.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (7)
1. a kind of method of multistage fragmentation, particle screen selecting prepare compound powder, which comprises the following steps:
(101) source metal is heated, becomes liquid；
(102) multistage fragmentation processing is carried out to the source metal of liquid, is atomized tiny liquid metal step by step using multistage pressure
It is atomized into fine molten drop, forms fine metal drop；
(103) fine metal drop is screened, is adjusted using air pressure air-flow, it is anti-that the fine metal drop of screening is imported into compound
Answer system；
On the inner wall of thermostat metal container, equally distributed certain driving air-flow round is set, the gas of importing is inert gas, benefit
With the gas of importing, small in size, light-weight fine metal drop is filtered out, by fine metal drop channel, is driven fine
Molten drop enters compound reaction system；Fine metal drop channel is arranged in the opposite of certain driving air-flow round；And larger,
Heavier molten drop falls to the bottom of thermostat metal container, wait it is to be recycled, be atomized again；
(104) fine metal drop is reacted with reaction gas, fine metal drop is made to be converted to compound crystal grain；
(105) it by compound crystal grain fragmentation, reduces crystal grain and reunites and gather:
In the bottom and top of compound reaction system, multiple air-flow rounds for being used to import reaction gas are set, it is anti-in compound
The bottom outside of system is answered to add the particle vibrator for driving compound crystal grain to move up and down；
(106) compound crystal grain is cooled into compound powder；
(107) compound powder screening, Electrostatic Absorption processing；
(108) superfine powder staticizes, deposits, collection is handled.
2. the method for a kind of multistage fragmentation according to claim 1, particle screen selecting prepare compound powder, feature exist
In in the step (101), source metal is selected from one of gallium, aluminium, indium or silicon or a variety of.
3. the method for a kind of multistage fragmentation according to claim 1, particle screen selecting prepare compound powder, feature exist
In in the step (104), reaction gas is methane or reaction gas is at least one of ammonia, nitrogen.
4. the method for a kind of multistage fragmentation according to claim 1, particle screen selecting prepare compound powder, feature exist
In, in the step (106), cooled down using inner wall of the common nitrogen to the cooling chamber of compound reaction system, use
High-purity or ultra-pure nitrogen cools down to the inside of the cooling chamber of compound reaction system, and compound crystal grain is converted to
Compound powder.
5. the method for a kind of multistage fragmentation according to claim 1, particle screen selecting prepare compound powder, feature exist
In in the step (107), compound powder after cooling is slow by screening and Electrostatic Absorption processing, biggish powder particle
Slowly it falls, is classified according to the standard of setting, and smaller or fine compound powder floats with air-flow and enters super fine
Staticize, deposit, collect treatment process in end.
6. the method for a kind of multistage fragmentation according to claim 1, particle screen selecting prepare compound powder, feature exist
In in the step (108), superfine powder staticizes, deposits, collecting high pressure stainless steel hermetically sealed can of the processing in vacuum of processing
Middle progress.
7. the method for a kind of multistage fragmentation according to claim 1, particle screen selecting prepare compound powder, feature exist
In the compound powder is nitrogen base, oxygroup, hydrogen-based, carbon-based, chloro, fluorine-based, boryl, sulfur-based compound material.
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| BRPI0500616A (en) * | 2004-03-10 | 2007-07-10 | Rohm & Haas | processes for perfecting one or more performance characteristics of one or more metal oxide catalysts, and for producing unsaturated carboxylic acids |
| US8747956B2 (en) * | 2011-08-11 | 2014-06-10 | Ati Properties, Inc. | Processes, systems, and apparatus for forming products from atomized metals and alloys |
| CN105883731A (en) * | 2015-01-22 | 2016-08-24 | 南京杰博宏镓新型材料有限公司 | Preparation method of compound powder material |
| CN204841627U (en) * | 2015-05-27 | 2015-12-09 | 南京杰博宏镓新型材料有限公司 | Refractory compound powder material's preparation facilities |
| CN106268543A (en) * | 2015-05-27 | 2017-01-04 | 南京杰博宏镓新型材料有限公司 | A kind of preparation facilities of infusible compound dusty material and preparation method thereof |
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2018
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