CN109741839A - A kind of heat insulating metal and ceramic multilayer hollow sphere and preparation method thereof - Google Patents
A kind of heat insulating metal and ceramic multilayer hollow sphere and preparation method thereof Download PDFInfo
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- CN109741839A CN109741839A CN201811584366.2A CN201811584366A CN109741839A CN 109741839 A CN109741839 A CN 109741839A CN 201811584366 A CN201811584366 A CN 201811584366A CN 109741839 A CN109741839 A CN 109741839A
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 80
- 239000002184 metal Substances 0.000 title claims abstract description 80
- 239000000919 ceramic Substances 0.000 title claims abstract description 68
- 238000002360 preparation method Methods 0.000 title claims abstract description 42
- 239000000843 powder Substances 0.000 claims abstract description 37
- 238000000576 coating method Methods 0.000 claims abstract description 31
- 239000011248 coating agent Substances 0.000 claims abstract description 26
- 239000011230 binding agent Substances 0.000 claims abstract description 24
- 210000001161 mammalian embryo Anatomy 0.000 claims abstract description 23
- 238000001035 drying Methods 0.000 claims abstract description 13
- 238000002309 gasification Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 14
- 238000010792 warming Methods 0.000 claims description 14
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
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- 229940068984 polyvinyl alcohol Drugs 0.000 claims description 7
- 235000019422 polyvinyl alcohol Nutrition 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 7
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 3
- 238000009689 gas atomisation Methods 0.000 claims description 3
- 230000001788 irregular Effects 0.000 claims description 3
- 238000001465 metallisation Methods 0.000 claims description 3
- 229920002401 polyacrylamide Polymers 0.000 claims description 3
- 238000009692 water atomization Methods 0.000 claims description 3
- 239000003595 mist Substances 0.000 claims description 2
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- 239000002131 composite material Substances 0.000 abstract description 15
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 15
- 238000005245 sintering Methods 0.000 description 14
- 229910010293 ceramic material Inorganic materials 0.000 description 11
- 229910001220 stainless steel Inorganic materials 0.000 description 9
- 239000010935 stainless steel Substances 0.000 description 9
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 239000007769 metal material Substances 0.000 description 5
- 238000000889 atomisation Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000008187 granular material Substances 0.000 description 3
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- 238000013016 damping Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000009740 moulding (composite fabrication) Methods 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
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- 239000005995 Aluminium silicate Substances 0.000 description 1
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- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The present invention is to provide a kind of heat insulating metals and ceramic multilayer hollow sphere and preparation method thereof.Using automatic coating machine to ceramic hollow ball sprinkling metal powder and misty binder solution, metal powder is coated in the surface of ceramic hollow ball, drying obtains multi-layer hollow element embryo；Gasification volatilization is carried out to the binder in multi-layer hollow element embryo, is then sintered and heat insulating metal and ceramic multilayer hollow sphere is prepared.The present invention carries out two kinds of material hollow spheres compound, obtaining has high-intensitive, low thermally conductive, advantages of good shielding performance MULTILAYER COMPOSITE hollow sphere, overcome that existing ceramic hollow ball deformation force is poor, brittleness is big, and two kinds of respective defects of material such as metal hollow ball is heat-insulated, shielding properties is insufficient, it lays the foundation to develop heat-insulation composite material and the component of China's Nuclear Electricity.
Description
Technical field
The present invention relates to a kind of heat-barrier materials, and the present invention also relates to a kind of preparation methods of heat-barrier material.Specifically
Say it is a kind of metal and ceramic multilayer hollow sphere and preparation method thereof.
Background technique
China's Nuclear Electricity constantly flourishes in recent years, and advanced Nuclear Power technology constantly upgrades, multiple for high-performance nuclear power
Closing heat-barrier material has high requirements.Such as: the heat-insulated barrel member in the reactor system of nuclear power equipment of new generation, it is desirable that in structure
In the lesser situation of part thickness, construction material has the lower coefficient of heat conduction.Shown according to research and bibliography at this stage
Metal hollow ball composite material can satisfy requirement of this kind of component to the coefficient of conductivity.Metal hollow ball composite material is a kind of logical
The methods of oversintering or casting link together the metal hollow ball of random arrangement in three-dimensional space the porous light being prepared into
Material.Unique hollow structure make such composite material have low-density, high specific strength, high specific stiffness, it is low it is thermally conductive, it is high shielding,
The multi-functional characteristic such as high energy-absorbing, impact resistance, high acoustic absorption, high-damping, has broad application prospects in nuclear power field.Metal hollow
Why ball and its composite material have the performances such as outstanding heat-insulated, shielding, are primarily due to when energy such as heat, neutron, rays
When amount is transmitted in hollow structure, on the one hand transmitted along the longer ball wall of route, on the one hand along inner air
It propagates and the change in path occurs in ball wall, two kinds of paths can slow down energy transmission speed, reach and stop the energy such as hot-fluid, ray
The effect of amount.And root, it was found that when the hole diameter of material is less than 4mm, free convection will not occur for the gas in stomata.It is comprehensive
Upper described, metal hollow ball composite material realizes heat-insulated purpose by following three aspects, first is that the bulk density of material is made to exist
It is small as far as possible while keeping enough mechanical strengths；Second is that the convection current of gas is preferably minimized；Third is that will be by enough
More interfaces and it is preferably minimized heat radiation by the study on the modification of material.Only by the hollow sphere and its compound of metal material preparation
Material has some limitations, if the heat-proof quality of metal material is poor and the feature of shielding properties deficiency, to limit
Application of the metal hollow ball composite material in nuclear power field.
It is well known that using ceramics as the ceramic material of representative, due to low heating conduction, thus have it is good every
Hot property and good shielding properties.But ceramic hollow ball made from single ceramic material, that there are brittleness is big, intensity is low, difficult
The problems such as to bear load and deformation, makes it difficult to be applied to manufacture some components for having strength demand.
Application No. is in the patent document of 201611084221.7 (publication date: on May 31st, 2017), disclose one kind not
Rust steel-ceramic composite preparation method is infused by the processing to ceramic material and to the control of technique by metal powder
Penetrate the seamless connection for realizing metal and ceramic matrix, make the metal-ceramic composite material being prepared not only had it is high-intensitive but also
With corrosion resistant ceramic plane.
Summary of the invention
The purpose of the present invention is to provide a kind of intensity height, thermally conductive low, advantages of good shielding performance heat insulating metal and ceramic multilayers
Hollow sphere.The object of the invention is also to provide the combination of a kind of metal and ceramic hollow ball and formings well, obtained more
The heat insulating metal of the excellent in mechanical performance of layer hollow sphere and the preparation method of ceramic multilayer hollow sphere.
The object of the present invention is achieved like this:
Heat insulating metal and ceramic multilayer hollow sphere of the invention is using ceramic hollow ball as endothecium structure and template, using painting
Coating method obtains multi-layer hollow element embryo in ceramic hollow ball surface metallization powder；To the metal powder of multi-layer hollow element embryo into
Row sintering preparation, obtains one layer of metal shell, obtained heat insulating metal and ceramic multilayer hollow sphere outside ceramic hollow ball.
Heat insulating metal of the invention can also include: with ceramic multilayer hollow sphere
1. the diameter range of the ceramic hollow ball are as follows: 0.2-10mm；Wall thickness range are as follows: 10-1000 μm.
2. the thickness range of the metal shell are as follows: 10-2000 μm.
Heat insulating metal of the invention and ceramic multilayer hollow sphere the preparation method comprises the following steps:
Using automatic coating machine to ceramic hollow ball sprinkling metal powder and misty binder solution, metal powder is coated in
The surface of ceramic hollow ball, drying obtain multi-layer hollow element embryo；Gasification is carried out to the binder in multi-layer hollow element embryo to wave
Hair, is then sintered preparation.
The preparation method of heat insulating metal of the invention and ceramic multilayer hollow sphere can also include:
1. the mist binder solution is poly-vinyl alcohol solution, polyacrylamide solution or ethyl silicate solution, it is added
Binder quality be metal powder quality 1%-5%.
2. automatic coating machine revolving speed is 30-200r/min, coating time 10-60min.
3. the temperature of the drying is 30-60 DEG C, drying time 10-60min.
4. the metal powder is the particle size range being prepared using gas atomization, water atomization or mechanical attrition method
Are as follows: it is not more than 60 μm；Shape is the metal powder of spherical, strip or irregular shape.
5. the gasification volatilization is to be warming up to 220-350 DEG C with 2-5 DEG C/min heating rate, 30-60min is kept the temperature.
6. the sintering preparation is to be warming up to 0.7-0.95T with 5-20 DEG C/min heating ratem, keep the temperature 2-6h, Zhi Housui
Furnace is cooling, TmFor the melting temperature of metal.
Effectively to bring the advantage of ceramic material and metal material respectively into play, gold is prepared the invention proposes a kind of
Category/ceramic multilayer hollow sphere method.The multiple layer metal hollow sphere as made from such method can combine metal and pottery well
The thermal stabilization shield performance of the materials such as the intensity of metal material and ceramics is carried out good combination by the ceramic materials such as porcelain.It is obtained
Multi-layer hollow, outer layer metal shell can effectively improve the intensity of former ceramic hollow ball, make hollow sphere in different stress shapes
Deformational behavior under state becomes ductile fracture from brittle fracture；The ceramic shells such as internal layer ceramics also mention while providing support
For effective heat-insulated and shielding action.Therefore, compared to the metal hollow ball of single layer, ceramics and metallic multilayer compound hollow microballoon
Multilayered structure make hollow sphere have good mechanics and heat-proof quality.Composite material is prepared with such multi-layer hollow, no
It is only capable of playing feature of hollow ball structure itself, makes composite material that there is lightweight, the advantage of energy-absorbing, vibration damping；Due to inner ceramic
The introducing of layer, can more play the advantage of ceramic material, effectively improve the heat-insulated and shielding properties of Hollow Sphere Composites.For exploitation
The heat-insulation composite material and component of China's Nuclear Electricity lay the foundation.
Be in order to solve existing ceramic hollow ball deformation force is poor, brittleness is big and metal hollow ball is heat-insulated, shielding properties not
The equal two kinds of respective defects of material of foot, the present invention two kinds of material hollow spheres are carried out it is compound, obtain have it is high-intensitive, low it is thermally conductive,
The MULTILAYER COMPOSITE hollow sphere of advantages of good shielding performance.
In order to achieve the object of the present invention, using ceramic hollow ball as the endothecium structure of multi-layer hollow and template, using painting
Coating method obtains multi-layer hollow element embryo in its surface metallization powder；Preparation is sintered to metal-powder in high temperature furnace,
One layer of metal shell with certain thickness and intensity is obtained outside ceramic hollow ball, so that multi-layer hollow be made.
Ceramic hollow ball of the invention is the ceramics with different-diameter, different wall thickness obtained by different preparation methods
Hollow sphere.The methods of described different preparation methods, including melt blowout method, powder metallurgic method；The different-diameter is straight
Diameter range are as follows: 0.2-10mm；The different wall thickness, wall thickness range are as follows: 10-1000 μm.
Ceramic hollow ball of the invention, using aluminium oxide ceramics as the ceramic material for being prepared as hollow sphere of representative, including
Pure alumina, aluminium oxide and certain element oxide (SiO2, MgO etc.) mixture, kaolin or other ceramic materials.It is described
Other ceramic materials sintering range be higher than outer layer metal material melting point.
Coating method of the invention: ceramic hollow ball is put into the tourelle of automatic coating machine；It opens after rolling, makes
With ceramic hollow ball template sprinkling metal powder and misty binder solution of the spray nozzle device of automatic coating machine into tourelle；
Metal powder, is coated in the surface of ceramic hollow ball by the revolving speed and setting coating time for adjusting automatic coating machine；Coating is completed
Afterwards, it opens hot air pipe and bottom heater is dried to obtain multi-layer hollow element embryo.
The revolving speed of automatic coating machine is 0-500r/min, coating time 10-60min.
Binder includes poly-vinyl alcohol solution, polyacrylamide solution and ethyl silicate solution etc..
The mass concentration ratio range of binder are as follows: 1%-5%；The binder quality of addition is the 1%- of metal powder quality
5%.
Drying temperature is 30-60 DEG C, drying time 10-60min.
Metal powder of the invention is the metal as made from different preparation methods, with different-grain diameter, different powder shapes
Powder.The different preparation methods include the powder preparation methods such as gas atomization, water atomization, mechanical attrition method；It is described
Different-grain diameter range are as follows: be not more than 60 μm；The different powder shapes, include spherical shape, strip, irregular shape
Powder.
The melting range of the metal-powder: it is lower than internal layer ceramic material sintering temperature, powder metallurgy formation can be passed through.
The high temperature furnace includes that can provide vacuum or protective atmosphere, heating temperature to sinter to fusing up to outer layer metal
The heating and heat-insulating device of temperature.
The sintering preparation includes binder removal technique and two step of metal sintering process, makes the bonding in plain embryo first
Then the sintering preparation of multi-layer hollow is completed in the gasification volatilization of the organic principles such as agent.
The binder removal technique: it is warming up to 220-350 DEG C with 2-5 DEG C/min heating rate, keeps the temperature 30-60min.
The metal sintering process: 0.7-0.95T is warming up to 5-20 DEG C/min heating ratem(TmFor the fusing point of metal
Temperature), keep the temperature 2-6h, later furnace cooling.
The thickness range of the outer layer metal shell are as follows: 10-2000 μm.
The multi-layer hollow: outer layer metal shell is well combined with internal layer ceramic hollow ball, and no clear gap is opened
Split, hole the defects of；Multi-layer hollow roundness is preferable, has certain intensity.
Mainly illustrate the features of the present invention and technical principle from the following aspects:
1, the preparation of multi-layer hollow element embryo: the multi-layer hollow element embryo obtained by such coating method, roundness
Height, surface quality is good, is well combined with internal layer ceramic hollow ball.Have the characteristics that manufacturing cost is low, strong operability, has one
Fixed designability is, it can be achieved that produce in enormous quantities.
2, the preparation of outer layer metal shell: by choosing suitable preparation temperature and soaking time, metal-powder is in fusing point
Lower heating and thermal insulation, the surface free energy of powder granule increase, in the part that powder granule is in contact, from the powder surface of protrusion to
Material transport and diffusion occur for recessed contact portion, sintering neck are formed, so as to form connection；Part powder is due to temperature unevenness
Or ingredient unevenness is deformed and is melted, and is connected under the support of internal layer hollow sphere with internal layer ceramic material and other powder granules
It connects.Good combination and forming may be implemented under the supporting role of internal layer ceramic hollow ball in outer layer metal.The branch of inner shell
Support can help to efficiently reduce the hole of outer layer metal during the sintering process, and the microstructure of surface metal-layer is finer and close, energy
The effectively mechanical property of multi-layer hollow.
3, the combination of metal/ceramic shell: by choosing suitable preparation process, outer layer metal is with internal layer ceramics certain
At a temperature of obtain preferable combination, interface cohesion does not occur the defects of hole, cavity, cracking out.
Detailed description of the invention
Fig. 1 is multi-layer hollow structural schematic diagram of the invention, in which: 1 is ceramic hollow ball；2 be metal shell.
Fig. 2 is the surface topography of 316L stainless steel/alumina multi-layer hollow in the embodiment of the present invention 3.
Fig. 3 is the microstructure characteristic of 316L stainless steel/alumina multi-layer hollow in the embodiment of the present invention 3.
Fig. 4 is the interfacial microstructure of 316L stainless steel/alumina multi-layer hollow in the embodiment of the present invention 3.
Specific embodiment
It illustrates below and the present invention is described in more detail.
Embodiment 1
Alumina hollow ball after cleaning is put into the tourelle of automatic coating machine, grain is added thereto by step 1
The 316L powder of stainless steel that diameter is 30-35 μm；Binder is made using the polyvinyl alcohol water solution that concentration is 4-4.5%, passes through spray
Mouth device sprays the binder solution of atomization into tourelle, while opening tourelle.Adjusting revolving speed is 40-50r/min,
Coating time is 15-20min.After the completion of coating, the hot air pipe and decentralization heating device of equipment are opened, to multi-layer hollow element embryo
It is dried.Drying time 20-30min.
Multi-layer hollow element embryo is placed into crucible, is put into vacuum high temperature furnace and is sintered preparation by step 2.Viscous
It ties agent and removes the stage, be warming up to 280-300 DEG C with 3-4 DEG C/min, keep the temperature 30-40min；In the metal sintering stage, then with 10-15
DEG C/min is warming up to 0.8-0.85 times of 316L stainless steel fusing point, keep the temperature 2-4h.316L stainless steel/oxidation is completed in furnace cooling afterwards
The preparation of aluminium multi-layer hollow.
Embodiment 2
Alumina hollow ball after cleaning is put into the tourelle of automatic coating machine, grain is added thereto by step 1
The pure titanium powder that diameter is 15-20 μm；Binder is made using the polyvinyl alcohol water solution that concentration is 2.5-3%, passes through spray nozzle device
The binder solution of atomization is sprayed into tourelle, while opening tourelle.Adjusting revolving speed is 40-50r/min, when coating
Between be 15-20min.After the completion of coating, the hot air pipe and decentralization heating device of equipment are opened, multi-layer hollow element embryo is dried
It is dry.Drying time 30-40min.
Multi-layer hollow element embryo is placed into crucible, is put into vacuum high temperature furnace and is sintered preparation by step 2.Viscous
It ties agent and removes the stage, be warming up to 280-300 DEG C with 2-2.5 DEG C/min, keep the temperature 30-40min；In the metal sintering stage, then with 10-
15 DEG C/min is warming up to 0.8 times of pure titanium fusing point, keeps the temperature 3h.Pure titanium/aluminum oxide multi-layer hollow sphere system is completed in furnace cooling afterwards
It is standby.
Embodiment 3
Alumina hollow ball after cleaning is put into the tourelle of automatic coating machine, grain is added thereto by step 1
The 316L powder of stainless steel that diameter is 30 μm；Using concentration be 4% polyvinyl alcohol water solution make binder, by spray nozzle device to
The binder solution of atomization is sprayed in tourelle, while opening tourelle.Adjusting revolving speed is 50r/min, and coating time is
15-20min.After the completion of coating, the hot air pipe and decentralization heating device of equipment are opened, multi-layer hollow element embryo is dried.
Drying time 30min.
Multi-layer hollow element embryo is placed into crucible, is put into vacuum high temperature furnace and is sintered preparation by step 2.Viscous
It ties agent and removes the stage, be warming up to 300 DEG C with 3 DEG C/min, keep the temperature 30min；It is warming up in the metal sintering stage, then with 10 DEG C/min
0.8 times of 316L stainless steel fusing point keeps the temperature 4h.The preparation of 316L stainless steel/alumina multi-layer hollow is completed in furnace cooling afterwards.
Embodiment 4
Alumina hollow ball after cleaning is put into the tourelle of automatic coating machine, grain is added thereto by step 1
The pure titanium powder that diameter is 20 μm；Binder is made using the polyvinyl alcohol water solution that concentration is 3%, is filled by spray nozzle device to rolling
The binder solution of middle sprinkling atomization is set, while opening tourelle.Adjusting revolving speed is 50r/min, coating time 15-
20min.After the completion of coating, the hot air pipe and decentralization heating device of equipment are opened, multi-layer hollow element embryo is dried.Drying
Time 30min.
Multi-layer hollow element embryo is placed into crucible, is put into vacuum high temperature furnace and is sintered preparation by step 2.Viscous
It ties agent and removes the stage, be warming up to 300 DEG C with 2 DEG C/min, keep the temperature 30min；It is warming up in the metal sintering stage, then with 10 DEG C/min
0.8 times of pure titanium fusing point keeps the temperature 3h.The preparation of pure titanium/aluminum oxide multi-layer hollow sphere is completed in furnace cooling afterwards.
Claims (10)
1. a kind of heat insulating metal and ceramic multilayer hollow sphere, it is characterized in that: being adopted using ceramic hollow ball as endothecium structure and template
Multi-layer hollow element embryo is obtained in ceramic hollow ball surface metallization powder with coating method；To the metal of multi-layer hollow element embryo
Powder is sintered preparation, and one layer of metal shell is obtained outside ceramic hollow ball, and obtained heat insulating metal and ceramic multilayer are empty
Bulbus cordis.
2. heat insulating metal according to claim 1 and ceramic multilayer hollow sphere, it is characterized in that: the ceramic hollow ball is straight
Diameter range are as follows: 0.2-10mm；Wall thickness range are as follows: 10-1000 μm.
3. heat insulating metal according to claim 1 or 2 and ceramic multilayer hollow sphere, it is characterized in that: the metal shell
Thickness range are as follows: 10-2000 μm.
4. the preparation method of a kind of heat insulating metal and ceramic multilayer hollow sphere, it is characterized in that: empty to ceramics using automatic coating machine
Bulbus cordis sprays metal powder and misty binder solution, and metal powder is coated in the surface of ceramic hollow ball, and drying obtains multilayer
Hollow sphere element embryo；Gasification volatilization is carried out to the binder in multi-layer hollow element embryo, is then sintered preparation.
5. the preparation method of heat insulating metal according to claim 4 and ceramic multilayer hollow sphere, it is characterized in that: the mist
Binder solution is poly-vinyl alcohol solution, polyacrylamide solution or ethyl silicate solution, and the binder quality of addition is metal
The 1%-5% of powder quality.
6. the preparation method of heat insulating metal according to claim 4 and ceramic multilayer hollow sphere, it is characterized in that: automatic coating
Machine revolving speed is 30-200r/min, coating time 10-60min.
7. the preparation method of heat insulating metal according to claim 4 and ceramic multilayer hollow sphere, it is characterized in that: the drying
Temperature be 30-60 DEG C, drying time 10-60min.
8. the preparation method of heat insulating metal according to claim 4 and ceramic multilayer hollow sphere, it is characterized in that: the metal
Powder is the particle size range being prepared using gas atomization, water atomization or mechanical attrition method are as follows: is not more than 60 μm；Shape is
The metal powder of spherical, strip or irregular shape.
9. the preparation method of heat insulating metal according to claim 4 and ceramic multilayer hollow sphere, it is characterized in that: the gasification
Volatilization is that 220-350 DEG C is warming up to 2-5 DEG C/min heating rate, keeps the temperature 30-60min.
10. the preparation method of heat insulating metal according to claim 4 and ceramic multilayer hollow sphere, it is characterized in that: the burning
Knot preparation is to be warming up to 0.7-0.95T with 5-20 DEG C/min heating ratem, keep the temperature 2-6h, later furnace cooling, TmFor metal
Melting temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811584366.2A CN109741839A (en) | 2018-12-24 | 2018-12-24 | A kind of heat insulating metal and ceramic multilayer hollow sphere and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811584366.2A CN109741839A (en) | 2018-12-24 | 2018-12-24 | A kind of heat insulating metal and ceramic multilayer hollow sphere and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109741839A true CN109741839A (en) | 2019-05-10 |
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Cited By (5)
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| CN110170649A (en) * | 2019-05-28 | 2019-08-27 | 哈尔滨工程大学 | A kind of preparation method of composite hollow ball |
| RU2733591C1 (en) * | 2019-12-03 | 2020-10-05 | Акционерное Общество "Российский Концерн По Производству Электрической И Тепловой Энергии На Атомных Станциях" (Ао "Концерн Росэнергоатом") | Device for installation of external heat insulation of housing of nuclear reactor |
| CN112209732A (en) * | 2020-10-13 | 2021-01-12 | 杜文中 | Preparation process of porous hollow ceramic adsorption ball |
| CN112820431A (en) * | 2020-12-31 | 2021-05-18 | 中核北方核燃料元件有限公司 | Metal wall microcapsule nuclear fuel pellet added with oxide and preparation method thereof |
| CN116060622A (en) * | 2023-02-09 | 2023-05-05 | 哈尔滨工程大学 | Heat insulation material with hollow shell structure and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110170649A (en) * | 2019-05-28 | 2019-08-27 | 哈尔滨工程大学 | A kind of preparation method of composite hollow ball |
| CN110170649B (en) * | 2019-05-28 | 2021-07-13 | 哈尔滨工程大学 | Preparation method of composite hollow sphere |
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| KR102637224B1 (en) | 2019-12-03 | 2024-02-15 | 조인트 스탁 컴퍼니 “로제네르고아톰” | Device for installing external thermal insulation in a nuclear reactor vessel |
| CN112209732A (en) * | 2020-10-13 | 2021-01-12 | 杜文中 | Preparation process of porous hollow ceramic adsorption ball |
| CN112820431A (en) * | 2020-12-31 | 2021-05-18 | 中核北方核燃料元件有限公司 | Metal wall microcapsule nuclear fuel pellet added with oxide and preparation method thereof |
| CN116060622A (en) * | 2023-02-09 | 2023-05-05 | 哈尔滨工程大学 | Heat insulation material with hollow shell structure and preparation method thereof |
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