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Preparation Method of Metal/Ceramic Gradient Material by Pressure Filtration in Alternating Magnetic Field

A technology of alternating magnetic field and press-filter molding, which is applied in the field of material preparation to achieve the effects of cost reduction, process simplification and wide application range

Inactive Publication Date: 2017-08-11
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the above-mentioned methods have great limitations

Method used

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  • Preparation Method of Metal/Ceramic Gradient Material by Pressure Filtration in Alternating Magnetic Field

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) Mold preparation

[0029] Mix α-gypsum and β-gypsum mixed gypsum powder with water, add polyvinyl fluoride organic additives, the content of which is 5% of the mass of gypsum, stir for 3 minutes and pour, and the gypsum slurry is solidified, hardened and dried to make Obtain a gypsum mold, the inner mold cavity of the mold is a disc with a height of 15mm and a diameter of 15mm;

[0030] 2) Slurry preparation

[0031] Metallic Cu particles with a particle size of 0.1 μm and ZrO particles with a particle size of 0.1–1000 μm 2 Mix the ceramic particles according to the mass ratio of 0.1:1, add deionized water until the solid phase content reaches 30vol%, ball mill in a ball mill for 1 hour, and ultrasonically disperse for 1 minute to prepare a dispersed slurry;

[0032] 3) Press filter forming in alternating magnetic field

[0033] The dispersion slurry is injected into the plaster mold, and an alternating magnetic field is applied outside the mold. The alternating m...

Embodiment 2

[0038] 1) Mold preparation

[0039] Mix α-gypsum and β-gypsum mixed gypsum powder with water, add melamine resin organic additive, the content of which is 10% of the mass of gypsum, stir for 5 minutes and pour, and the gypsum slurry is solidified, hardened and dried to obtain gypsum Mold, the inner cavity of the mold is a disc with a height of 15mm and a diameter of 15mm;

[0040] 2) Slurry preparation

[0041] Mix metal Al particles with a particle size of 1 μm and ceramic SiC particles with a particle size of 1 μm at a mass ratio of 1:1, add deionized water until the solid phase content reaches 40vol%, ball mill in a ball mill for 2 hours, and ultrasonically disperse for 3 minutes , making a dispersion slurry;

[0042] 3) Press filter forming in alternating magnetic field

[0043] The dispersion slurry is injected into the plaster mold, and an alternating magnetic field is applied outside the mold. The alternating magnetic field is generated by the alternating current passi...

Embodiment 3

[0048] 1) Mold preparation

[0049] Mix α-gypsum and β-gypsum mixed gypsum powder with water, add phenolic resin organic additives, the content of which is 15% of the mass of gypsum, stir for 8 minutes and pour, and the gypsum slurry is solidified, hardened and dried to obtain gypsum Mold, the inner cavity of the mold is a disc with a height of 15mm and a diameter of 15mm;

[0050] 2) Slurry preparation

[0051] Metallic Ag particles with a particle size of 10 μm and ceramic SiO with a particle size of 10 μm 2 Mix the particles according to the mass ratio of 0.1:1, add deionized water until the solid phase content reaches 45vol%, ball mill in a ball mill for 5 hours, and ultrasonically disperse for 8 minutes to prepare a dispersed slurry;

[0052] 3) Press filter forming in alternating magnetic field

[0053] The dispersion slurry is injected into the plaster mold, and an alternating magnetic field is applied outside the mold. The alternating magnetic field is generated by ...

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Abstract

The invention discloses a pressing filtration forming preparation method for metal / ceramic gradient materials in an alternating magnetic field, and belongs to the field of material preparation. The method comprises the steps that 1, a multi-hole mold is prepared; 2, metal particles with the good electrical conductivity and ceramic particles with the high electrical resistivity are mixed with deionized water according to a certain ratio and stirred in a ball mill to form a uniformly-dispersed sizing agent; 3, pouring and pressing filtration forming are performed in the alternating magnetic field with the current strength being 0.1-20 A and the current frequency being 10<2>-10<5> Hz; 4, samples are dried and sintered. The method has the advantages that the alternating magnetic field is applied on the basis of the filter pressing forming technology to prepare the gradient materials, the current strength, frequency and other technological parameters are adjusted, the controllable gradient materials with the continuously-changing components can be conveniently obtained, and the cost is greatly lowered.

Description

technical field [0001] The invention relates to a method for preparing a metal / ceramic gradient material by pressure filtration in an alternating magnetic field, and belongs to the field of material preparation. Background technique [0002] Filtration molding is a ceramic component molding process that has developed rapidly in recent years and has attracted widespread attention. Its main principle is to make the slurry with solid phase ceramic particles dispersed in liquid medium under certain conditions pass The slurry pipeline enters the mold cavity, and part of the liquid medium is filtered out through the porous filter layer, so that the ceramic particles are closely arranged and solidified into a ceramic green body with a certain shape. [0003] Ceramic materials prepared from powder raw materials usually include several steps of powder preparation, powder processing, powder molding, and sintering densification. Each step has the potential to introduce defects. Some ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/16
Inventor 彭晓领李静杨艳婷徐靖才王攀峰金红晓金顶峰洪波王新庆葛洪良
Owner CHINA JILIANG UNIV
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