CN115005514A - Nickel-based slurry for electronic cigarette atomizing core, preparation method of nickel-based slurry, atomizing core, electronic cigarette and application - Google Patents

Nickel-based slurry for electronic cigarette atomizing core, preparation method of nickel-based slurry, atomizing core, electronic cigarette and application Download PDF

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Publication number
CN115005514A
CN115005514A CN202110241405.4A CN202110241405A CN115005514A CN 115005514 A CN115005514 A CN 115005514A CN 202110241405 A CN202110241405 A CN 202110241405A CN 115005514 A CN115005514 A CN 115005514A
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nickel
electronic cigarette
core
metal powder
slurry
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张玲玲
林信平
胡锐
李震
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BYD Co Ltd
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BYD Co Ltd
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    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/70—Manufacture
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/1003—Use of special medium during sintering, e.g. sintering aid
    • B22F3/1007—Atmosphere
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/24—Electrically-conducting paints

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Conductive Materials (AREA)

Abstract

In order to solve the problems that a conductive coating in an existing electronic cigarette atomization core is not strong in binding force to a base body and is easy to fall off in the using process, the invention provides a nickel-based slurry for an electronic cigarette atomization core, which comprises the following components in parts by total mass of 100: 5-35 parts of spheroidal nickel-based metal powder, 5-15 parts of rod-shaped nickel-based metal powder, 30-60 parts of inorganic glass powder and 10-25 parts of organic carrier. The nickel-based slurry for the electronic cigarette atomizing core provided by the invention has outstanding bonding performance, the formed conductive coating has strong adhesion to a substrate, and the problems that the conductive coating is easy to fall off and the service life is short in the use process of the electronic cigarette are further solved on the basis of keeping the required resistance.

Description

Nickel-based slurry for electronic cigarette atomizing core, preparation method of nickel-based slurry, atomizing core, electronic cigarette and application
Technical Field
The invention relates to the technical field of electronic cigarettes, in particular to nickel-based slurry for an electronic cigarette atomized core and a preparation method and application thereof.
Background
The electronic cigarette is an electronic product simulating a cigarette, and has the same appearance, smoke and experience as the traditional ignition type cigarette. Generally, an electronic cigarette mainly comprises an atomizing device and a power supply, wherein the atomizing device mainly comprises a heating component and an oil storage device. Firstly, the tobacco juice water conservancy diversion that leads oil device and store in with the oil storage device is to heating element, and heating element connects the power and produces the heat, forms smog with the tobacco juice atomizing, flows out from the air current passageway to supply the user to inhale.
At present, the types of atomization devices in the market are mainly divided into two main types according to the difference of materials used for atomization cores: one is to adopt the atomization cotton as the atomization core, the other is to adopt the porous ceramic as the atomization core, the electronic cigarette using the atomization cotton atomization core is easy to produce burnt smell of the atomization cotton and metal taste produced by heating of the metal heating wire in the smoking process, because the atomization cotton has large air permeability, the metal taste produced by the metal heating wire directly enters the mouth of the smoker along with the smoke, and the smoking mouth feel has great defects; therefore, electronic cigarettes using porous ceramic atomizing cores are the mainstream technology.
Among the prior art, the structure of electron smog core mainly comprises porous ceramic atomizing core and the conductive coating who sets up on porous ceramic atomizing core, and this conductive coating produces the heat and heats porous ceramic atomizing core when the circular telegram to make the tobacco tar after contacting with porous ceramic atomizing core, and heated atomizing into the oil mist when the micropore through porous ceramic atomizing core, and spout in the micropore of porous ceramic atomizing core. The performance of the conductive coating plays a crucial role in effectively atomizing the tobacco tar by the atomizing core, and the conductive coating is easy to fall off due to various factors such as physical impact in the using process, so that the service life of the electronic cigarette is influenced, and therefore, the adhesion between the conductive coating and the porous ceramic atomizing core is greatly tested.
Disclosure of Invention
The invention aims to overcome the defects that in the prior art, a conductive coating in an electronic cigarette atomization core is not strong in binding force to a substrate and is easy to fall off in the using process, so that the nickel-based slurry for the electronic cigarette atomization core is excellent in binding property and cannot reduce the conductive property.
The purpose of the invention is realized by the following technical scheme: the nickel-based slurry for the electronic cigarette atomizing core comprises the following components in parts by weight based on 100 parts of the total mass of the nickel-based slurry: 5-35 parts of sphere-like nickel-based metal powder, 5-15 parts of rod-like nickel-based metal powder, 30-60 parts of inorganic glass powder and 10-25 parts of organic carrier.
Optionally, the spheroidal nickel-based metal powder and the rod-shaped nickel-based metal powder are selected from at least one of metallic nickel, nickel-chromium alloy and nickel-chromium-iron alloy.
Optionally, the D50 of the sphere-like nickel-based metal powder is 0.1-5 μm, and further, the D50 is preferably 0.2-2 μm, and the D100 is less than 5 μm.
Optionally, the length-diameter ratio of the rod-shaped nickel-based metal powder is 5-50, and further, the preferred length-diameter ratio is 10-30.
Optionally, the inorganic glass powder is selected from SiO 2 、Al 2 O 3 MgO and Na 2 At least one of O.
Optionally, the inorganic glass powder has a D50 of 1-3 μm and a softening point of 500-800 ℃.
Optionally, the organic vehicle comprises: a resin and an organic solvent;
the resin is selected from at least one of ethyl cellulose, polymethacrylic resin, rosin resin and phenolic resin;
the organic solvent is at least one selected from diethylene glycol butyl ether acetic acid, diethylene glycol ethyl ether acetate, diethylene glycol butyl ether, terpineol, tributyl citrate, butyl carbitol, alcohol ester dodeca and oleic acid.
In order to solve the technical problem, the invention also provides a preparation method of the nickel-based slurry for the electronic cigarette atomizing core, which comprises the following steps:
(1) preliminarily premixing the sphere-like nickel-based metal powder, the rod-like nickel-based metal powder and the inorganic glass powder, and performing ball milling;
(2) drying the mixed powder after ball milling;
(3) mixing resin and an organic solvent to prepare an organic carrier;
(4) and (3) mixing the dried mixed powder in the step (2) with the prepared organic carrier, and performing ball milling or open milling by a double-roller mill to obtain the nickel-based slurry for the electronic cigarette atomizing core.
The invention also provides an electronic cigarette atomization core, which comprises an atomization core substrate and a conductive layer positioned on the atomization core substrate; the conductive layer is formed by metallizing and sintering the nickel-based slurry.
The invention also provides an electronic cigarette which comprises the electronic cigarette atomization core.
The invention also provides application of the nickel-based slurry for the electronic cigarette atomization core, and the nickel-based slurry for the electronic cigarette atomization core is printed on the porous ceramic atomization core by adopting a screen printing process and is subjected to metallization sintering in a protective atmosphere.
Optionally, the metallization sintering is specifically sintering in an ammonia nitrogen atmosphere furnace at 900-1150 ℃ for 20-30 minutes.
Compared with the prior art, the invention has the beneficial effects that: the nickel-based slurry disclosed by the invention is simple in preparation process, strong in binding force to a substrate, and capable of effectively solving the problem that the service life of the electronic cigarette is influenced by the falling off of the conductive coating in the use process. Meanwhile, the spherical nickel-based metal powder and the rod-shaped nickel-based metal powder are compounded, so that the close arrangement of the metal powder is facilitated, the metal contact points are improved, and the problem of reduced conductivity caused by the reduction of the input ratio of the nickel-based metal powder can be effectively solved. Therefore, the nickel-based metal slurry provided by the invention has the excellent characteristic of further improving the bonding force to the base material while maintaining the effective conductive performance.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more apparent, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The purpose of the invention is realized by the following technical scheme: the nickel-based slurry for the electronic cigarette atomizing core comprises the following components in parts by weight based on 100 parts of the total mass of the nickel-based slurry: 5-35 parts of spheroidal nickel-based metal powder, 5-15 parts of rod-shaped nickel-based metal powder, 30-60 parts of inorganic glass powder composite material and 10-25 parts of organic carrier.
Through the matching use of the sphere-like nickel-based metal powder and the rod-like nickel-based metal powder, in the nickel-based slurry, the nickel-based metal powders in two different shapes are tightly arranged under the action of glass liquid, in the conductive coating formed by sintering the slurry, the arrangement of the metal powders is tighter, the number of metal contact points is more, the bonding force between the conductive coating and the substrate is strong, the conductivity is good, and the conductivity of the coating cannot be influenced even if the input ratio of the nickel-based metal powder is reduced.
In an embodiment of the present invention, the spherical nickel-based metal powder and the rod-shaped nickel-based metal powder are at least one selected from the group consisting of metallic nickel, nichrome and nichrome.
In an embodiment of the present invention, the D50 of the spheroidal Ni-based metal powder is 0.1-5 μm, and further, the D50 is preferably 0.2-2 μm, and D100 is less than 5 μm.
In one embodiment of the present invention, the aspect ratio of the rod-shaped nickel-based metal powder is 5 to 50, in another embodiment of the present invention, the aspect ratio of the rod-shaped nickel-based metal powder is 5 to 50, and in another embodiment of the present invention, the aspect ratio of the rod-shaped nickel-based metal powder is 10 to 30.
By limiting the D50 of the sphere-like nickel-based metal powder to be 0.1-5 mu m and the length-diameter ratio of the rod-like nickel-based metal powder to be 5-50, the nickel-based metal powders with two different shapes are arranged more tightly in the slurry, and the formed conductive layer has stronger bonding force with the substrate and better conductivity.
In one embodiment of the present invention, the inorganic glass powder is selected from SiO 2 、Al 2 O 3 MgO and Na 2 At least one of O.
In one embodiment of the present invention, the inorganic glass powder has a D50 value of 1-3 μm and a softening point of 500-800 ℃.
In another embodiment of the present invention, two or more kinds of the inorganic glass powders are used in combination.
In this embodiment, the above-mentionedThe machine glass powder is made of SiO 2 、Al 2 O 3 MgO and Na 2 And O, in some embodiments of the invention, the inorganic glass powder is a lead-free glass powder with a low softening point and a low expansion coefficient, the softening temperature is 500-800 ℃, the D50 is 1-3 μm, and the inorganic glass powder does not contain heavy metals such as lead and the like with environmental pollution, thereby meeting the requirement of environmental protection. And during high-temperature sintering, the inorganic glass powder is softened, the glass liquid is soaked into gaps of the nickel-based metal particles to drive the nickel-based metal powder with different particle sizes and shapes to be orderly arranged and tightly insulated for a certain time, the nickel-based metal powder and the glass liquid can generate a molten state, and when the temperature is reduced, the liquid phase is solidified and shrunk due to the reduction of the temperature and is recrystallized to form a uniform nickel-based metal film which is firmly attached to the substrate.
In one embodiment of the present invention, the organic vehicle includes: a resin and an organic solvent; the resin is selected from at least one of ethyl cellulose, polymethacrylic resin, rosin resin and phenolic resin;
the solvent is at least one selected from diethylene glycol butyl ether acetic acid, diethylene glycol ethyl ether acetate, diethylene glycol butyl ether, terpineol, tributyl citrate, butyl carbitol, alcohol ester dodeca and oleic acid.
The organic carrier in the nickel-based slurry is well known to those skilled in the art, and particularly, in a more preferred embodiment, the organic carrier is obtained by combining terpineol, tributyl citrate, butyl carbitol and ethyl cellulose.
In an embodiment of the invention, a preparation method of a nickel-based slurry for an electronic cigarette atomizing core comprises the following steps:
(1) preliminarily premixing the sphere-like nickel-based metal powder, the rod-like nickel-based metal powder and the inorganic glass powder, and performing ball milling;
(2) drying the mixed powder after ball milling;
(3) mixing resin and an organic solvent to prepare an organic carrier;
(4) and (3) mixing the dried mixed powder in the step (2) with a prepared organic carrier, and carrying out ball milling or open milling by a double-roller machine to obtain the nickel-based slurry for the electronic cigarette atomizing core.
In an embodiment of the present invention, the electronic cigarette aerosol core includes an aerosol core substrate and a conductive layer on the aerosol core substrate, and a film thickness of the conductive layer may be 20 to 80 μm, preferably 60 μm; the atomizing core substrate in the electronic cigarette atomizing core is well known to those skilled in the art, and specifically, in one embodiment, the atomizing core substrate is a porous ceramic atomizing core;
in some embodiments of the invention, the atomizing core substrate may also be a porous glass atomizing core;
the conductive coating is formed by metallizing and sintering the nickel-based slurry;
in an embodiment of the invention, the application of the nickel-based paste for the electronic cigarette atomization core is to print the nickel-based paste for the electronic cigarette atomization core on a porous ceramic atomization core by adopting a screen printing process and perform metallization sintering in a protective atmosphere.
Specifically, in an embodiment of the present invention, the nickel-based slurry may be linearly distributed on the porous ceramic atomizing core, so as to uniformly heat the porous ceramic atomizing core and prevent the soot from being accumulated inside the porous ceramic atomizing core.
In addition, as further preferred, can also replace porous ceramic atomizing core with porous high temperature resistant glass atomizing core, can effectively prevent that porous ceramic from dropping the problem that influences the suction taste.
In another embodiment of the invention, the nickel-based slurry may also be transferred to the porous ceramic atomizing core using a deposition, spray, or like process.
In an embodiment of the invention, the metallization sintering is specifically sintering in an ammonia nitrogen atmosphere furnace at 900-1150 ℃ for 20-30 minutes.
The present invention will be further illustrated by the following examples.
Example 1
Pouring 35g of spheroidal nickel-chromium alloy powder, 5g of rodlike nickel-chromium powder and 40g of inorganic glass powder with the melting point of 700 ℃ into a zirconia ball milling tank, using absolute ethyl alcohol as a ball milling medium, carrying out ball milling for 4-10 hours at the rotating speed of 300r/min, then putting the ball milling tank into a vacuum drying oven, drying for 3 hours at the temperature of 100 ℃, and finally screening the dried nickel-based alloy powder and the inorganic glass powder by a 100-mesh screen.
Terpineol, butyl carbitol and ethyl cellulose are mixed according to the mass ratio: 80%: 15%: 5% of the mixture was mixed, stirred in a water bath at 80 ℃ for 3 hours until the ethyl cellulose was completely dissolved, cooled to room temperature and added with oleic acid, 1.5% of the organic mixture.
Weighing the nickel-chromium alloy mixture and the organic carrier according to the mass fractions of 80% and 20%, and uniformly mixing and stirring to obtain the metal slurry. And (4) silk-screening the slurry on the porous ceramic substrate for 3-6 times. And finally, putting the porous ceramic plate coated with the metal slurry into a drying box, and drying for 1 hour at 100 ℃.
And (3) putting the porous ceramic substrate coated with the metal slurry into an ammonia decomposing furnace for sintering for 30 min.
The film thickness was 60 μm as measured under a microscope, the resistance was 1.2. omega. as measured on a resistance tester, and the bonding force between the metal film and the porous ceramic substrate was 8N as measured on a tensile tester.
Example 2
30g of spheroidal nickel-chromium alloy powder, 10g of rodlike nickel-chromium powder and 40g of inorganic glass powder with the melting point of 700 ℃ are poured into a zirconia ball milling tank, absolute ethyl alcohol is used as a ball milling medium, ball milling is carried out for 4-10 hours at the rotating speed of 300r/min, then the ball milling tank is placed into a vacuum drying oven, drying is carried out for 3 hours at the temperature of 100 ℃, and finally the dried nickel-based alloy powder and the inorganic glass powder pass through a 100-mesh screen.
Terpineol, butyl carbitol and ethyl cellulose are mixed according to the mass ratio: 80%: 15%: 5% are mixed, stirred in a water bath at 80 ℃ for 3 hours until the ethylcellulose is completely dissolved, cooled to room temperature and then oleic acid is added in an amount of 1.5% of the organic mixture.
Weighing the nichrome mixture and the organic carrier according to the mass fractions of 80% and 20%, and uniformly mixing and stirring to obtain the metal slurry. And (4) silk-screening the slurry on the porous ceramic substrate for 3-6 times. And finally, putting the porous ceramic plate coated with the metal slurry into a drying box, and drying for 1 hour at 100 ℃.
The porous ceramic substrate coated with the metal slurry was placed in an ammonia decomposition furnace to be sintered for 30 min.
The film thickness was 60 μm as measured under a microscope, the resistance was 1.1. omega. as measured on a resistance tester, and the bonding force between the metal film and the porous ceramic substrate was 10N as measured on a tensile tester.
Example 3
Pouring 25g of spheroidal nickel-chromium alloy powder, 15g of rodlike nickel-chromium powder and 40g of inorganic glass powder with the melting point of 700 ℃ into a zirconia ball milling tank, using absolute ethyl alcohol as a ball milling medium, carrying out ball milling for 4-10 hours at the rotating speed of 300r/min, then putting the ball milling tank into a vacuum drying oven, drying for 3 hours at the temperature of 100 ℃, and finally screening the dried nickel-based alloy powder and the inorganic glass powder by a 100-mesh screen.
Terpineol, butyl carbitol and ethyl cellulose are mixed according to the mass ratio: 80%: 15%: 5% of the mixture was mixed, stirred in a water bath at 80 ℃ for 3 hours until the ethyl cellulose was completely dissolved, cooled to room temperature and added with oleic acid, 1.5% of the organic mixture.
Weighing the nickel-chromium alloy mixture and the organic carrier according to the mass fractions of 80% and 20%, and uniformly mixing and stirring to obtain the metal slurry. And (4) silk-screening the slurry on the porous ceramic substrate for 3-6 times. And finally, putting the porous ceramic plate coated with the metal slurry into a drying box, and drying for 1 hour at 100 ℃.
The porous ceramic substrate coated with the metal slurry was placed in an ammonia decomposition furnace to be sintered for 30 min.
The film thickness was 60 μm as measured under a microscope, the resistance was 1.05. omega. as measured on a resistance tester, and the bonding force between the metal film and the porous ceramic substrate was 12N as measured on a tensile tester.
Example 4
Pouring 25g of spheroidal nichrome powder, 15g of rod-like nichrome powder and 40g of inorganic glass powder with the melting point of 700 ℃ into a zirconia ball milling tank, using absolute ethyl alcohol as a ball milling medium, carrying out ball milling for 4-10 hours at the rotating speed of 300r/min, then putting the ball milling tank into a vacuum drying oven, drying for 3 hours at the temperature of 100 ℃, and finally screening the dried nickel-based alloy powder and the inorganic glass powder through a 100-mesh screen.
The preparation method comprises the following steps of mixing terpineol, butyl carbitol and ethyl cellulose in a mass ratio: 80%: 15%: 5% of the mixture was mixed, stirred in a water bath at 80 ℃ for 3 hours until the ethyl cellulose was completely dissolved, cooled to room temperature and added with oleic acid, 1.5% of the organic mixture.
Weighing the nickel-chromium-iron alloy mixture and the organic carrier according to the mass fractions of 80% and 20%, and uniformly mixing and stirring to obtain the metal slurry. And (4) silk-screening the slurry on the porous ceramic substrate for 3-6 times. And finally, putting the porous ceramic plate coated with the metal slurry into a drying box, and drying for 1 hour at 100 ℃.
The porous ceramic substrate coated with the metal slurry was placed in an ammonia decomposition furnace to be sintered for 30 min.
The film thickness was 60 μm as measured under a microscope, the resistance was 1.15. omega. as measured on a resistance tester, and the bonding force between the metal film and the porous ceramic substrate was 10N as measured on a tensile tester.
Comparative example 1
50g of spherical nickel-chromium alloy powder and 30g of inorganic glass powder with the melting point of 700 ℃ are poured into a zirconia ball milling tank, absolute ethyl alcohol is used as a ball milling medium, ball milling is carried out for 4-10 hours at the rotating speed of 300r/min, then the ball milling tank is placed into a vacuum drying oven, drying is carried out for 3 hours at the temperature of 100 ℃, and finally the mixture of the dried nickel-based alloy powder and the inorganic glass powder is screened by a 100-mesh screen.
Terpineol, butyl carbitol and ethyl cellulose are mixed according to the mass ratio: 80%: 15%: 5% are mixed, stirred in a water bath at 80 ℃ for 3 hours until the ethylcellulose is completely dissolved, cooled to room temperature and then oleic acid is added in an amount of 1.5% of the organic mixture.
Weighing the nichrome mixture and the organic carrier according to the mass fractions of 80% and 20%, and uniformly mixing and stirring to obtain the metal slurry. And (4) silk-screening the slurry on the porous ceramic substrate for 3-6 times. And finally, putting the porous ceramic plate coated with the metal slurry into a drying box, and drying for 1 hour at 100 ℃.
The porous ceramic substrate coated with the metal slurry was placed in an ammonia decomposition furnace to be sintered for 30 min.
The thickness of the film is 60 μm under the microscope test, the resistance is 1.7 omega on the resistance tester, and the bonding force between the metal film and the porous ceramic matrix is 0N and the film is directly separated on the tensile tester.
Comparative example 2
Pouring 40g of spherical nickel-chromium alloy powder and 40g of inorganic glass powder with the melting point of 700 ℃ into a zirconia ball milling tank, taking absolute ethyl alcohol as a ball milling medium, carrying out ball milling for 4-10 hours at the rotating speed of 300r/min, then putting the ball milling tank into a vacuum drying oven, drying for 3 hours at the temperature of 100 ℃, and finally screening the mixture of the dried nickel-base alloy powder and the inorganic glass powder through a 100-mesh screen.
Terpineol, butyl carbitol and ethyl cellulose are mixed according to the mass ratio: 80%: 15%: 5% of the mixture was mixed, stirred in a water bath at 80 ℃ for 3 hours until the ethyl cellulose was completely dissolved, cooled to room temperature and added with oleic acid, 1.5% of the organic mixture.
Weighing the nichrome mixture and the organic carrier according to the mass fractions of 80% and 20%, and uniformly mixing and stirring to obtain the metal slurry. And (4) silk-screening the slurry on the porous ceramic substrate for 3-6 times. And finally, putting the porous ceramic plate coated with the metal slurry into a drying box, and drying for 1 hour at 100 ℃.
And (3) putting the porous ceramic substrate coated with the metal slurry into an ammonia decomposing furnace for sintering for 30 min.
The film thickness is 60 μm under microscope test, the resistance is 3.5 omega on resistance tester, and the bonding force between the metal film and the porous ceramic matrix is 1.5N on tensile tester.
The relevant performance tests for each example and comparative example are shown in the following table:
TABLE 1
Figure BDA0002962318190000081
From the data in table 1, it can be seen that the weight ratio of the inorganic glass powder to the nickel-based metal powder in examples 1 to 4 is 1:1, the weight ratio of the inorganic glass powder to the nickel-based metal powder in comparative example 1 is 3:5, the binding force of the prepared coating is only 0N, and the coating can fall off, and the binding force of the conductive coating in examples 1 to 4 is greater than that of comparative example 1, so that the increase of the charge ratio of the inorganic glass powder can significantly increase the binding force of the coating to the substrate.
The resistance values of the examples 1 to 4 are not much different from that of the comparative example 1, while the resistance value of the comparative example 2 is obviously increased, so that the conductivity of the nickel-based metal powder is not changed much even if the charge ratio of the nickel-based metal powder is reduced in the examples 1 to 4 compared with that of the comparative example 1, and the conductivity of the comparative example 2 is obviously reduced, so that the coating prepared by the spherical nickel-based metal powder and the rod-like nickel-based metal powder has better conductivity compared with the coating prepared by the single spherical nickel-based metal powder.
Meanwhile, as can be seen from the data in examples 1 to 4, the binding force of the coating is in a positive correlation with the content of the rod-shaped nickel-based metal powder in the nickel-based metal powder mixture, and thus the binding force of the coating can be further improved by increasing the content of the rod-shaped nickel-based metal powder, but the resistance of the coating tends to decrease with the increase of the content of the rod-shaped nickel-based metal powder, so that the mass ratio of the spheroidal nickel-based metal powder to the rod-shaped nickel-based metal powder can be adjusted according to the resistance required by the electronic cigarette.
In conclusion, the invention can further improve the binding force of the nickel-based slurry to the substrate by improving the feeding ratio of the inorganic glass powder to the nickel-based metal powder in the production process, and effectively solves the problem that the service life of the electronic cigarette is influenced by the falling off of the conductive coating in the use process. The spherical-like nickel-based metal powder and the rod-like nickel-based metal powder are compounded, so that the close arrangement of the metal powder is facilitated, the metal contact point is improved, and the problem of reduction of the conductivity caused by reduction of the input ratio of the nickel-based metal powder can be effectively solved. Therefore, the nickel-based metal slurry provided by the invention has the excellent characteristic of further improving the bonding force to the base material while maintaining the effective conductivity.
The above description is intended to be illustrative of the preferred embodiment of the present invention and should not be taken as limiting the invention, but rather, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Claims (12)

1. The nickel-based slurry for the electronic cigarette atomizing core is characterized by comprising the following components in parts by weight based on 100 parts of the total mass of the nickel-based slurry: 5-35 parts of spheroidal nickel-based metal powder, 5-15 parts of rod-shaped nickel-based metal powder, 30-60 parts of inorganic glass powder and 10-25 parts of organic carrier.
2. The electronic cigarette atomizing core nickel-based slurry of claim 1, wherein the sphere-like nickel-based metal powder and the rod-like nickel-based metal powder are at least one selected from metal nickel, nickel-chromium alloy and nickel-chromium-iron alloy.
3. The nickel-based paste for an electronic aerosolization core of claim 1, wherein the spheroidal nickel-based metal powder comprises a D50 of 0.1-5 μ ι η.
4. The nickel-based paste for the electronic aerosolization core of claim 1, wherein the rod-like nickel-based metal powder has an aspect ratio of 5-50.
5. The nickel-based paste for the electronic aerosolization core of claim 1, wherein the inorganic glass frit is selected from the group consisting of SiO 2 、Al 2 O 3 MgO and Na 2 At least one of O.
6. The nickel-based paste for the electronic cigarette atomizing core as claimed in claim 1, wherein the inorganic glass powder has a D50 of 1-3 μm and a softening point of 500-800 ℃.
7. The nickel-based paste for an electronic aerosolization core of claim 1, wherein the organic vehicle comprises: a resin and an organic solvent;
the resin is selected from at least one of ethyl cellulose, polymethacrylic resin, rosin resin and phenolic resin;
the organic solvent is at least one selected from diethylene glycol butyl ether acetic acid, diethylene glycol ethyl ether acetate, diethylene glycol butyl ether, terpineol, tributyl citrate, butyl carbitol, alcohol ester dodeca and oleic acid.
8. The method for preparing the nickel-based paste for the electronic cigarette atomizing core according to any one of claims 1 to 7, wherein the method for preparing the nickel-based paste comprises the following steps:
(1) preliminarily premixing the sphere-like nickel-based metal powder, the rod-like nickel-based metal powder and the inorganic glass powder, and performing ball milling;
(2) drying the mixed powder after ball milling;
(3) mixing resin and an organic solvent to prepare an organic carrier;
(4) and (3) mixing the dried mixed powder obtained in the step (2) with the prepared organic carrier, and performing ball milling or double-roller open milling to obtain the nickel-based slurry for the electronic cigarette atomizing core.
9. An electronic cigarette atomization core is characterized by comprising an atomization core substrate and a conducting layer positioned on the atomization core substrate;
the conductive layer is formed by metallizing and sintering the nickel-based slurry according to any one of claims 1 to 7.
10. An electronic cigarette comprising the electronic aerosolization core of claim 9.
11. The application of the nickel-based slurry for the electronic cigarette atomization core is characterized in that the nickel-based slurry for the electronic cigarette atomization core as claimed in any one of claims 1 to 7 is printed on a porous ceramic atomization core by a screen printing process, and metallized sintering is carried out under a protective atmosphere.
12. The application of the nickel-based slurry for the electronic cigarette atomizing core as recited in claim 11, wherein the metallization sintering is specifically sintering at 900-1150 ℃ for 20-30 minutes in an ammonia nitrogen atmosphere furnace.
CN202110241405.4A 2021-03-04 2021-03-04 Nickel-based slurry for electronic cigarette atomizing core, preparation method of nickel-based slurry, atomizing core, electronic cigarette and application Pending CN115005514A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115831441A (en) * 2022-12-19 2023-03-21 深圳市吉迩科技有限公司 Heating resistor slurry and manufacturing method of ceramic atomizing core with temperature control function
CN115947619A (en) * 2022-12-30 2023-04-11 深圳市爱斯强科技有限公司 Humidity-sensitive heating slurry, preparation method thereof and atomization core

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115831441A (en) * 2022-12-19 2023-03-21 深圳市吉迩科技有限公司 Heating resistor slurry and manufacturing method of ceramic atomizing core with temperature control function
CN115947619A (en) * 2022-12-30 2023-04-11 深圳市爱斯强科技有限公司 Humidity-sensitive heating slurry, preparation method thereof and atomization core
CN115947619B (en) * 2022-12-30 2023-09-05 深圳市爱斯强科技有限公司 Humidity-sensitive heating slurry, preparation method thereof and atomization core

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