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Preparation method of Fe-Al intermetallic compound porous membrane

A technology of intermetallic compounds and porous membranes, applied in the field of metal porous membrane materials, can solve the problems that metal porous membranes cannot have high precision, high permeability mechanical properties and renewable properties at the same time, and achieve mechanical properties and renewable properties Good, strong transmission performance, high precision effect

Active Publication Date: 2014-04-02
WESTERN BAODE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing a Fe-Al series intermetallic compound porous membrane, which solves the problem that the existing metal porous membrane cannot simultaneously have high precision, high permeability, mechanical properties and reproducibility

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The Fe with an average particle size of 1μm 3 The Al aerosolized spherical alloy powder is mixed with a polyvinyl butyral ethanol solution with a polyvinyl butyral mass concentration of 1% at a ratio of 800 g / L, and is formulated into a suspended particle slurry by mechanical stirring. Then use a spray gun to evenly spray the suspended particle slurry on the substrate, and select Fe for the substrate 3 Al porous pipe with size The surface average pore diameter is 30μm, and the air permeability is 300m 3 / kpa·h·m 2 , Spraying to obtain a film with a thickness of 100μm, and drying at room temperature for 60 minutes. In a hydrogen sintering furnace with high-purity hydrogen atmosphere, the temperature is slowly raised to 400°C at a rate of 1.9°C / min, and the temperature is kept for 301min for degreasing, and then at a rate of 4°C / min to 900°C, and the temperature is kept for 2 hours to complete the film sinter . Then the temperature is lowered to 450°C and kept for 305 min...

Embodiment 2

[0028] The Fe with an average particle size of 50μm 3 The Al aerosolized spherical alloy powder is mixed with a polyvinyl butyral ethanol solution with a mass concentration of 10% polyvinyl butyral at a ratio of 400 g / L, and is prepared into a suspended particle slurry through mechanical stirring. Then use a spray gun to evenly spray the suspended particle slurry on the substrate, and select Fe for the substrate 3 Al porous pipe with size The surface average pore diameter is 30μm, and the air permeability is 300m 3 / kpa·h·m 2 , Spraying to obtain a film with a thickness of 50μm, and drying at room temperature for 60 minutes. In a hydrogen sintering furnace with high-purity hydrogen atmosphere, the temperature is slowly raised to 280°C at a rate of 2.1°C / min, and kept for 295min for degreasing treatment, and then heated at a rate of 4°C / min to 1200°C, and kept for 1.7 hours to complete the film sintering . Then the temperature is lowered to 550°C and kept for 5 hours to complet...

Embodiment 3

[0030] The Fe with an average particle size of 25μm 3 The Al aerosolized spherical alloy powder is mixed with a polyvinyl butyral ethanol solution with a polyvinyl butyral mass concentration of 5% at a ratio of 600 g / L, and is prepared into a suspended particle slurry by mechanical stirring. Then use a spray gun to evenly spray the suspended particle slurry on the substrate, and select Fe for the substrate 3 Al porous pipe with size The surface average pore diameter is 10μm, and the air permeability is 100m 3 / kpa·h·m 2 , Spraying to obtain a film with a thickness of 100μm, and drying at room temperature for 60 minutes. In a hydrogen sintering furnace, the temperature is slowly raised to 400°C at a rate of 2°C / min in a high-purity hydrogen atmosphere, and the temperature is kept for 300 minutes for degreasing, and then at a rate of 3°C / min to 1150°C, and the temperature is kept for 1 hour to complete the film sintering . Then, the temperature is lowered to 500° C. and kept for...

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PUM

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Abstract

The invention discloses a preparation method of Fe-Al intermetallic compound porous membrane, which comprises the following steps: firstly, adding a binder into an organic solution, and then adding gas-atomized spherical alloy powder and preparing suspended particle slurry by mixing and stirring; spraying the suspended particle slurry on a matrix surface uniformly, and forming a film and drying at room temperature; carrying out low temperature degreasing and high temperature sintering for the matrix with sprayed film, and carrying out an ordering processing for the alloy phase, and obtaining the Fe-Al intermetallic compound porous membrane. The Fe-Al intermetallic compound porous membrane prepared by the method provided by the invention has the advantages of high precision, good permeability, good mechanical properties and reproducibility.

Description

Technical field [0001] The invention belongs to the technical field of metal porous film materials, and specifically relates to a method for preparing a Fe-Al intermetallic compound porous film. Background technique [0002] As a functional material for two-phase separation, metal porous membrane material is widely used in modern industry, especially in the production process of coal chemical industry and petrochemical industry. Because hydrogen sulfide gas is often present in the working environment, it will cause strong corrosion to equipment and functional components under high temperature and high pressure. In this environment, the metal porous membrane (that is, the functional part of the material) has a larger specific surface area, resulting in a faster corrosion rate, causing serious blockage of the pores and loss of function, which directly affects the stable operation of the entire production system. The Fe-Al intermetallic compound material has excellent resistance to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08B22F3/11
Inventor 张晓晗周济南海娟王耀辉戚乐刘荣臻吴引江段庆文
Owner WESTERN BAODE TECH CO LTD
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