CN117655333A - Porous metal body and preparation method thereof, atomizer heating element and preparation method thereof - Google Patents
Porous metal body and preparation method thereof, atomizer heating element and preparation method thereof Download PDFInfo
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- CN117655333A CN117655333A CN202311515428.5A CN202311515428A CN117655333A CN 117655333 A CN117655333 A CN 117655333A CN 202311515428 A CN202311515428 A CN 202311515428A CN 117655333 A CN117655333 A CN 117655333A
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 155
- 239000002184 metal Substances 0.000 title claims abstract description 155
- 238000010438 heat treatment Methods 0.000 title claims abstract description 62
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 239000000843 powder Substances 0.000 claims abstract description 100
- 239000000203 mixture Substances 0.000 claims abstract description 63
- 238000005245 sintering Methods 0.000 claims abstract description 43
- 238000003825 pressing Methods 0.000 claims abstract description 22
- 238000001816 cooling Methods 0.000 claims abstract description 20
- 238000002156 mixing Methods 0.000 claims abstract description 19
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 18
- 238000000227 grinding Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 238000002161 passivation Methods 0.000 claims description 4
- 239000010936 titanium Substances 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 229910000619 316 stainless steel Inorganic materials 0.000 claims description 3
- 229910001120 nichrome Inorganic materials 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000000889 atomisation Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 6
- -1 titanium hydride Chemical compound 0.000 description 28
- 229910000048 titanium hydride Inorganic materials 0.000 description 28
- 239000002245 particle Substances 0.000 description 22
- 239000011148 porous material Substances 0.000 description 22
- 238000000748 compression moulding Methods 0.000 description 15
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 14
- 239000001257 hydrogen Substances 0.000 description 14
- 229910052739 hydrogen Inorganic materials 0.000 description 14
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 14
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 12
- 241000208125 Nicotiana Species 0.000 description 10
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 10
- 230000008569 process Effects 0.000 description 6
- 239000000443 aerosol Substances 0.000 description 4
- 239000003571 electronic cigarette Substances 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 235000019504 cigarettes Nutrition 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 239000002923 metal particle Substances 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000462 isostatic pressing Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052987 metal hydride Inorganic materials 0.000 description 1
- 150000004681 metal hydrides Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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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
- A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
- A24F40/46—Shape or structure of electric heating means
-
- 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
- B22F3/02—Compacting only
-
- 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
- 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
- B22F3/11—Making porous workpieces or articles
-
- 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
- B22F3/24—After-treatment of workpieces or articles
-
- 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
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
-
- 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
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/241—Chemical after-treatment on the surface
-
- 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
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/247—Removing material: carving, cleaning, grinding, hobbing, honing, lapping, polishing, milling, shaving, skiving, turning the surface
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a porous metal body and a preparation method thereof, an atomizer heating body and a preparation method thereof, wherein the preparation method of the porous metal body comprises the following steps: mixing hydrogenated metal powder, oxidized metal powder and metal powder to obtain a mixture; pressing the mixture into a blank to obtain a green body; and sintering the green body in vacuum, and cooling to obtain the porous metal body. The porous metal body preparation method provided by the invention can enable the holes of the porous metal body to be through holes, and is applied to an atomizer to enable the atomization effect to be better.
Description
Technical Field
The invention relates to the field of atomizers, in particular to a porous metal body and a preparation method thereof, an atomizer heating body and a preparation method thereof.
Background
The atomizer of the electronic cigarette is a main component for storing cigarette liquid and generating aerosol, and comprises a heating component, wherein the heating component comprises an oil guide body and a heating body. The oil guide body is made of porous materials, and the porous materials have pores, so that the porous materials can absorb tobacco tar. The heating element can atomize tobacco tar in the holes of the porous heating element to form aerosol.
However, many blind holes exist in the prior porous material, so that the through holes are difficult to manufacture, the uniformity of atomization of tobacco tar is not high, and the smoke output is not large.
Disclosure of Invention
In view of the shortcomings of the prior art, the invention provides a porous metal body and a preparation method thereof, an atomizer heating body and a preparation method thereof, and aims to solve the problems that a plurality of blind holes exist in the existing porous material, through holes are difficult to manufacture, so that the uniformity of atomization of tobacco tar is low and the smoke output is low.
In order to achieve the above object, the present invention provides a method for preparing a porous metal body, comprising the steps of: mixing hydrogenated metal powder, oxidized metal powder and metal powder to obtain a mixture; pressing the mixture into a blank to obtain a green body; and sintering the green body in vacuum, and cooling to obtain the porous metal body.
Optionally, the mass of the hydrogenated metal powder accounts for 10-50% of the mass of the mixture.
Alternatively, the hydrogenated metal powder has a diameter of 1 μm to 50 μm.
Optionally, the diameter of the oxidized metal powder is 1-20 μm; and/or the diameter of the metal powder is 1-20 μm.
Optionally, the metal species include titanium, nickel, nichrome, or 316L stainless steel.
Optionally, the pressure of the pressed blank is 100Mpa-200Mpa.
Optionally, the vacuum sintering temperature is 1100-1450 ℃; and/or the vacuum sintering time is 2-24 hours. .
In order to achieve the above object, the present invention also provides a porous metal body prepared by the above method.
In order to achieve the above object, the present invention further provides a method for preparing a heating element of an atomizer, including: and passivating, partially grinding and adding an electrode to the porous metal body to obtain the porous metal body heating body.
In order to achieve the above purpose, the invention also provides an atomizer heating element, which is prepared by the method.
The invention has the beneficial effects that: the preparation method of the porous metal body provided by the invention utilizes the mixture and the pressing of the hydrogenated metal powder, the oxidized metal powder and the metal powder to prepare a blank, and then sintering, wherein during sintering, the metal hydride is heated and decomposed to generate tiny and uniform hydrogen bubbles, the hydrogen bubbles escape to form through holes, and meanwhile, the water formed in the process of reducing the metal oxide is changed into water vapor due to the high sintering temperature by utilizing the reduction effect of hydrogen, and the through holes are formed when the hydrogen escapes. The vacuum sintering can enable the porous green body to shrink and densify into a porous metal body with a certain microscopic pore and performance, and the porous metal body is sintered to form more uniform metal particles, so that the heat conducting performance of the porous metal body is improved. In addition, during sintering, generated hydrogen also has a penetrating effect, and can enter the powder particles at high temperature and high pressure to change the surface energy of the particles and promote the combination of the particles. The pores prepared by the invention are porous metal bodies with uniform density of through holes, and after the porous metal bodies are used for heating bodies of electronic cigarette atomizers, the through holes with more uniform pore diameters ensure that the obtained cigarettes have larger quantity, quick heat transfer, more uniform heating and full taste, ensure that the tobacco tar has excellent atomization effect, and have great industrial popularization value.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other related drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for preparing an atomizer heating element according to the invention.
FIG. 2 is a scanning electron microscope image of a porous metal body according to an embodiment of the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below, and it should be understood that the following embodiments are only for explaining the present invention and are not limited thereto.
Unless otherwise specified, all technical and scientific terms used herein have the ordinary meaning of the field to which the claimed subject matter pertains.
The atomizer of the electronic cigarette is a main component for storing cigarette liquid and generating aerosol, and comprises a heating component, wherein the heating component comprises an oil guide body and a heating body. The oil guide body is made of porous materials, and the porous materials have pores, so that the porous materials can absorb tobacco tar. The heating element can atomize tobacco tar in the holes of the porous heating element to form aerosol.
However, many blind holes exist in the prior porous material, so that the through holes are difficult to manufacture, the uniformity of atomization of tobacco tar is not high, and the smoke output is not large.
In order to solve the problems, the invention provides a porous metal body and a preparation method thereof, an atomizer heating element and a preparation method thereof, wherein the preparation method of the porous metal body comprises the following steps:
s1, mixing hydrogenated metal powder, oxidized metal powder and metal powder to obtain a mixture;
the hydrogenated metal powder, the oxidized metal powder and the metal powder are uniformly mixed together, so that various raw materials become a mixture for pressing, and the particles of the mixture are loosely stacked and have larger gaps, so that the mixture can be compressed. The mixing method is divided into dry type, semi-dry type and wet type, and in the powder premixing process, pores are not uniform easily due to uneven distribution due to different specific gravities and particle sizes of particles with different components.
S2, pressing the mixture into a blank to obtain a green body;
the mixture is formed by overlapping particles of hydrogenated metal powder, oxidized metal powder and metal powder, arch bridge phenomenon exists among the particles, when the mixture is subjected to pressure, acting force among the particles is overcome, particle rearrangement occurs, the arch bridge effect is destroyed, and the filling density in a die is improved. When the stress born by the particles in the embodiment of the invention reaches the yield limit of the particles, the particles are subjected to plastic deformation, and the high-strength green body is obtained after demoulding.
The mixture is pressed to form a blank body with a certain shape, size and density, and semi-finished products with preset shapes can be obtained by adopting modes of isostatic pressing, compression molding, extrusion molding or rolling and the like.
In some embodiments, the pressing is compression molding and the mold is an atomizer heat generating body mold.
And S3, sintering the green body in vacuum, and cooling to obtain the porous metal body.
The hydrogenated metal powder is heated and decomposed to generate tiny and uniform hydrogen bubbles, the action of hydrogen causes through holes, namely hydrogen holes, to be generated in the powder particles, water is generated in the process of reducing metal oxide by hydrogen, and the through holes are also formed when the hydrogen escapes due to the fact that the high temperature of sintering turns into water vapor. Vacuum sintering can shrink and densify a porous green body into a porous metal body with micropores. In the sintering process, the generated hydrogen can improve the fluidity of the powder particles and also has a permeation effect, can enter the powder particles at high temperature and high pressure, changes the surface energy of the particles, improves the contact area of the powder particles, and promotes the combination of the particles, thereby improving the uniformity and density of sintering, forming more uniform metal particles and improving the heat conduction performance of the porous metal body obtained by sintering. In step S3, the temperature of cooling may be room temperature, that is, after sintering the green body in vacuum, cooling to room temperature.
In the embodiment of the application, the atomizer can be applied to not only the electronic cigarette, but also other atomizing devices, such as a medical atomizing device, and is not limited herein.
In some embodiments, the porous metal body has a pore size of 5 μm to 100 μm. In some embodiments, the porous metal body has a pore size of 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, or 90 μm.
In some embodiments, the porous metal body has a porosity of 40% to 80%. In some embodiments, the porous metal body has a porosity of 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, or 80%.
Further, the mass of the hydrogenated metal powder accounts for 10-50% of the mass of the mixture. In some embodiments, the mass of the hydrogenated metal powder comprises 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50% of the mass of the mixture.
Further, the diameter of the hydrogenated metal powder is 1 μm to 50 μm. The diameter of the hydrogenated metal powder affects the amount of hydrogen gas generated, and further changes the pore size and porosity of the porous metal body. In some embodiments, the hydrogenated metal powder has a diameter of 5 μm to 30 μm. In some embodiments, the hydrogenated metal powder has a diameter of 5 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, or 50 μm.
Further, the diameter of the oxidized metal powder is 1-20 μm; and/or the diameter of the metal powder is 1-20 μm. The smaller the diameter of the powder, the finer the particles and the larger the specific surface area, and the easier the molding and sintering in the subsequent steps. In some embodiments, the oxidized metal powder has a diameter of 5 μm, 10 μm, 15 μm, or 20 μm. In some embodiments, the metal powder has a diameter of 5 μm, 10 μm, 15 μm, or 20 μm.
Further, the metal species include titanium, nickel, nichrome, or 316L stainless steel. In some embodiments, the metal is preferably titanium, i.e., the mix includes titanium hydride powder, titanium oxide powder, and titanium powder.
Further, the pressure of the pressed blank is 100Mpa-200Mpa. When the powder of the mixture is compressed in the mold, the powder flows and deforms in the mold, and overcomes the internal friction force of the powder and the external friction force of the powder and the mold, so that the powder is compressed into a green body. As the pressure increases, the porosity of the green body decreases. In some embodiments, the pressure at which the green compact is pressed is 100Mpa, 120Mpa, 140Mpa, 160Mpa, 180Mpa, or 200Mpa.
Further, the vacuum sintering temperature is 1100-1450 ℃.
In this scheme, the high temperature causes the titanium hydride metal powder to decompose hydrogen, and the action of the hydrogen causes through holes to be formed inside the powder particles. The vacuum sintering causes the green body to shrink, and a series of complex physicochemical processes such as diffusion, melting, flowing, shrinkage, recrystallization and the like are generated among the compacted metal matrix powder, so that strong bonding force is generated among matrix particles, the compact is realized, and certain hardness and strength are provided. The hydrogen pores are correspondingly reduced, and a porous metal body with small-aperture through holes is obtained. Controlling the variation of the sintering temperature allows the green body to retain its original shape and to have the same dimensional shrinkage. In order to ensure the control of the temperature variation, the sintering process is carried out in a vacuum furnace which can accurately control the heating temperature.
In some embodiments, the vacuum sintering temperature is 1100 ℃, 1150 ℃, 1200 ℃, 1250 ℃, 1300 ℃, 1350 ℃, 1400 ℃, 1450 ℃. Preferably, the sintering temperature is not lower than 1350 ℃.
Further, the vacuum sintering time is 2-24 hours. In some embodiments, the vacuum sintering temperature is from 5 hours to 15 hours. In some embodiments, the vacuum sintering temperature is 3h, 8h, 13h, 18h, or 23h.
In order to solve the problems, the invention also provides a porous metal body prepared by the preparation method, wherein the holes are through holes, the through holes are rich and uniform, and the specific surface area is larger. The pore diameter of the through hole of the porous metal body is 5-100 mu m, and the porosity is 40% -80%.
In order to solve the problems, the invention also provides a preparation method of the atomizer heating element, which comprises the following steps:
s1, mixing hydrogenated metal powder, oxidized metal powder and metal powder to obtain a mixture;
s2, pressing the mixture into a blank to obtain a green body;
s3, sintering the green body in vacuum, and cooling to obtain a porous metal body;
and S4, passivating the porous metal body, partially grinding and adding an electrode to obtain the porous metal body heating body.
Preferably, the mass of the hydrogenated metal powder accounts for 10-50% of the mass of the mixture.
Passivation includes the use of a strong oxidizing agent to form a dense oxide film layer on the surface of the porous metal body, and the passivated area of the surface of the porous metal body after passivation is non-conductive. Grinding two oxidation layers with small areas on the surface of the porous metal body to expose conductive metal parts, and connecting conductors such as upper pins by welding, pressing and the like to manufacture electrodes to obtain the porous metal body heating body. The electrode and the power supply are connected to make other internal areas of the porous metal body except the surface passivation area conduct electricity, the porous metal body generates heat after conducting electricity to become a metal body heating body, and meanwhile the porous metal body can be used as an oil guide body to absorb tobacco tar. That is, after the surface of the porous metal body is passivated and then ground and the electrode is connected, the porous metal body is used as an oil guide body and also as a heating body.
In other embodiments, after the surface of the porous metal body is passivated, other heating elements such as resistance heating wires may be directly provided on the surface of the porous metal body without grinding, that is, the porous metal body may be used only as an oil guide body, not as a heating element, and the heating element may be provided on the surface of the porous metal body.
In order to solve the problems, the invention also provides an atomizer heating element, which is prepared from the porous metal body, and through holes with more uniform apertures enable smoke output to be larger, heat transfer to be fast, heating to be more uniform, taste to be full, and excellent atomization effect of tobacco tar to be ensured.
Example 1:
mixing 30 μm of titanium hydride powder, 20 μm of titanium oxide powder and 15 μm of titanium powder to obtain a mixture; the mass of the titanium hydride powder accounts for 10% of the mass of the mixture; placing the mixture into a heating element mould, carrying out compression molding under the pressure of 150Mpa, and pressing into a blank to obtain a green body; vacuum sintering the green body at 1300 ℃ for 10 hours, and cooling to room temperature to obtain a porous metal body; and passivating, partially grinding and adding an electrode to the porous metal body to obtain the porous metal body heating body.
Example 2:
mixing 30 μm of titanium hydride powder, 15 μm of titanium oxide powder and 20 μm of titanium powder to obtain a mixture; the mass of the titanium hydride powder accounts for 15% of the mass of the mixture; placing the mixture into a heating element mould, carrying out compression molding under the pressure of 150Mpa, and pressing into a blank to obtain a green body; vacuum sintering the green body at 1350 ℃ for 7 hours, and cooling to room temperature to obtain a porous metal body; and passivating, partially grinding and adding an electrode to the porous metal body to obtain the porous metal body heating body.
Example 3:
mixing 30 μm of titanium hydride powder, 20 μm of titanium oxide powder and 20 μm of titanium powder to obtain a mixture; the mass of the titanium hydride powder accounts for 20% of the mass of the mixture; placing the mixture into a heating element mould, carrying out compression molding under the pressure of 150Mpa, and pressing into a blank to obtain a green body; vacuum sintering the green body at 1380 ℃ for 5 hours, and cooling to room temperature to obtain a porous metal body; and passivating, partially grinding and adding an electrode to the porous metal body to obtain the porous metal body heating body.
Example 4:
mixing 50 μm of titanium hydride powder, 15 μm of titanium oxide powder and 15 μm of titanium powder to obtain a mixture; the mass of the titanium hydride powder accounts for 20% of the mass of the mixture; placing the mixture into a heating element mould, carrying out compression molding under the pressure of 200Mpa, and pressing into a blank to obtain a green body; vacuum sintering the green body at 1200 ℃ for 12 hours, and cooling to room temperature to obtain a porous metal body; and passivating, partially grinding and adding an electrode to the porous metal body to obtain the porous metal body heating body.
Example 5:
mixing 50 μm of titanium hydride powder, 20 μm of titanium oxide powder and 20 μm of titanium powder to obtain a mixture; the mass of the titanium hydride powder accounts for 25% of the mass of the mixture; placing the mixture into a heating element mould, carrying out compression molding under the pressure of 200Mpa, and pressing into a blank to obtain a green body; vacuum sintering the green body at 1100 ℃ for 15 hours, and cooling to room temperature to obtain a porous metal body; and passivating, partially grinding and adding an electrode to the porous metal body to obtain the porous metal body heating body.
Example 6:
mixing 50 μm of titanium hydride powder, 10 μm of titanium oxide powder and 10 μm of titanium powder to obtain a mixture; the mass of the titanium hydride powder accounts for 30% of the mass of the mixture; placing the mixture into a heating element mould, carrying out compression molding under the pressure of 200Mpa, and pressing into a blank to obtain a green body; vacuum sintering the green compact at 1450 ℃ for 3 hours, and cooling to room temperature to obtain a porous metal body; and passivating, partially grinding and adding an electrode to the porous metal body to obtain the porous metal body heating body.
Example 7:
mixing 40 μm of titanium hydride powder, 20 μm of titanium oxide powder and 20 μm of titanium powder to obtain a mixture; the mass of the titanium hydride powder accounts for 35% of the mass of the mixture; placing the mixture into a heating element mould, carrying out compression molding under the pressure of 200Mpa, and pressing into a blank to obtain a green body; vacuum sintering the green compact at 1450 ℃ for 3 hours, and cooling to room temperature to obtain a porous metal body; and passivating, partially grinding and adding an electrode to the porous metal body to obtain the porous metal body heating body.
Example 8:
mixing 15 μm of titanium hydride powder, 10 μm of titanium oxide powder and 10 μm of titanium powder to obtain a mixture; the mass of the titanium hydride powder accounts for 40% of the mass of the mixture; placing the mixture into a heating element mould, carrying out compression molding under the pressure of 200Mpa, and pressing into a blank to obtain a green body; vacuum sintering the green compact at 1450 ℃ for 3 hours, and cooling to room temperature to obtain a porous metal body; and passivating, partially grinding and adding an electrode to the porous metal body to obtain the porous metal body heating body.
Example 9:
mixing 15 μm titanium hydride powder, 15 μm titanium oxide powder and 15 μm titanium powder to obtain a mixture; the mass of the titanium hydride powder accounts for 45% of the mass of the mixture; placing the mixture into a heating element mould, carrying out compression molding under the pressure of 200Mpa, and pressing into a blank to obtain a green body; vacuum sintering the green compact at 1450 ℃ for 3 hours, and cooling to room temperature to obtain a porous metal body; and passivating, partially grinding and adding an electrode to the porous metal body to obtain the porous metal body heating body.
Example 10:
mixing 20 mu m titanium hydride powder, 20 mu m titanium oxide powder and 20 mu m titanium powder to obtain a mixture; the mass of the titanium hydride powder accounts for 50% of the mass of the mixture; placing the mixture into a heating element mould, carrying out compression molding under the pressure of 200Mpa, and pressing into a blank to obtain a green body; vacuum sintering the green compact at 1450 ℃ for 3 hours, and cooling to room temperature to obtain a porous metal body; and passivating, partially grinding and adding an electrode to the porous metal body to obtain the porous metal body heating body.
Example 11:
mixing 20 μm titanium hydride powder, 15 μm titanium oxide powder and 5 μm titanium powder to obtain a mixture; the mass of the titanium hydride powder accounts for 50% of the mass of the mixture; placing the mixture into a heating element mould, carrying out compression molding under the pressure of 100Mpa, and pressing into a blank to obtain a green body; vacuum sintering the green compact at 1450 ℃ for 6 hours, and cooling to room temperature to obtain a porous metal body; and passivating, partially grinding and adding an electrode to the porous metal body to obtain the porous metal body heating body.
Example 12:
mixing 10 μm titanium hydride powder, 5 μm titanium oxide powder and 10 μm titanium powder to obtain a mixture; the mass of the titanium hydride powder accounts for 50% of the mass of the mixture; placing the mixture into a heating element mould, carrying out compression molding under the pressure of 150Mpa, and pressing into a blank to obtain a green body; vacuum sintering the green body at 1420 ℃ for 6 hours, and cooling to room temperature to obtain a porous metal body; and passivating, partially grinding and adding an electrode to the porous metal body to obtain the porous metal body heating body.
Example 13:
mixing 10 μm titanium hydride powder, 15 μm titanium oxide powder and 20 μm titanium powder to obtain a mixture; the mass of the titanium hydride powder accounts for 50% of the mass of the mixture; placing the mixture into a heating element mould, carrying out compression molding under the pressure of 150Mpa, and pressing into a blank to obtain a green body; vacuum sintering the green body at 1430 ℃ for 5 hours, and cooling to room temperature to obtain a porous metal body; and passivating, partially grinding and adding an electrode to the porous metal body to obtain the porous metal body heating body.
Further, the results of the examples are characterized to obtain a scanning electron microscope image, and referring to fig. 2, the holes of the porous metal body of the present invention are through holes, and the porous metal body has high porosity and uniform density.
The porosities and average pore diameters of examples 1 to 13 were measured by a Japanese microtrac-mrb mercury porosimeter, and the results of the measurement showed that the porosities of examples 1 to 13 were 40% to 80% and the pore diameters were 5 μm to 100. Mu.m.
The foregoing is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention, but various modifications and variations will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method for producing a porous metal body, comprising the steps of:
mixing hydrogenated metal powder, oxidized metal powder and metal powder to obtain a mixture;
pressing the mixture into a blank to obtain a green body;
and sintering the green body in vacuum, and cooling to obtain the porous metal body.
2. The method for producing a porous metal body according to claim 1, wherein the mass of the hydrogenated metal powder is 10% to 50% of the mass of the mixture.
3. The method for producing a porous metal body according to claim 1, wherein the diameter of the hydrogenated metal powder is 1 μm to 50 μm.
4. The method for producing a porous metal body according to claim 1, wherein the diameter of the oxidized metal powder is 1 μm to 20 μm;
and/or the diameter of the metal powder is 1-20 μm.
5. The method of producing a porous metal body according to claim 1, wherein the metal species comprises titanium, nickel, nichrome or 316L stainless steel.
6. The method for producing a porous metal body according to claim 1, wherein the pressure of the pressed blank is 100Mpa to 200Mpa.
7. The method of producing a porous metal body according to claim 1, wherein the vacuum sintering temperature is 1100 ℃ to 1450 ℃;
and/or the vacuum sintering time is 2-24 hours.
8. A porous metal body prepared by the preparation method according to any one of claims 1 to 7.
9. The preparation method of the atomizer heating element is characterized by comprising the following steps: the porous metal body produced by the production method according to any one of claims 1 to 7 is subjected to passivation, partial grinding, and electrode addition to obtain a porous metal body heat-generating body.
10. An atomizer heating element, characterized by being produced by the production method according to claim 9.
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