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Preparation method of porous ceramics with concentric holes and porous ceramics

A technology of porous ceramics and concentric holes, applied in the field of ceramics, can solve the problem of no concentric holes, etc., and achieve the effect of large specific surface area

Active Publication Date: 2019-04-16
PINGXIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, few studies have reported concentric holes

Method used

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  • Preparation method of porous ceramics with concentric holes and porous ceramics

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Embodiment 1

[0055] A method for preparing porous ceramics with concentric holes, consisting of the following parts by weight: D 50 60 parts of 37.6μm silicon carbide powder, D 50 40 parts of alumina powder with a diameter of 3.5 μm, 40 parts of soaked millet, 4 parts of acrylamide, 0.4 part of methylenebisacrylamide, 0.015 part of ammonium persulfate, and 0.3 part of dispersant.

[0056] With above-mentioned proportioning, implement according to the following steps:

[0057] (1) Mix the silicon carbide powder, alumina powder, acrylamide, methylenebisacrylamide and dispersant with water evenly, and prepare a stable suspension with a solid phase content of 45 vol.% in a planetary ball mill for 5 hours.

[0058] (2) Soak the millet in water to make it completely swollen and the surface is slightly pulverized, then take it out and dry it in the air until there is no moisture on the surface. Then the processed millet is made into a template, the prepared stable suspension is injected into th...

Embodiment 2

[0063] A porous ceramic with concentric pores, consisting of the following parts by weight: D 50 95 parts of 37.6μm silicon carbide powder, D 50 5 parts of alumina powder with a diameter of 3.5 μm, 42 parts of soaked sorghum rice, 5 parts of acrylamide, 0.5 part of methylenebisacrylamide, 0.015 part of ammonium persulfate, and 0.3 part of dispersant.

[0064] With above-mentioned proportioning, implement according to the following steps:

[0065] (1) Mix the silicon carbide powder, alumina powder, acrylamide, methylenebisacrylamide and dispersant with water evenly, and prepare a stable suspension with a solid phase content of 45 vol.% in a planetary ball mill for 4 hours.

[0066] (2) Soak the sorghum rice in the suspension so that it is completely imbibed and the surface is pulverized, then take it out and dry it in the air until there is no moisture on the surface. Then the processed sorghum rice is made into a template, the prepared stable suspension is injected into the ...

Embodiment 3

[0070] A porous ceramic with concentric pores, consisting of the following parts by weight: D 50 97 parts of alumina powder of 3.5 μm, D 50 3 parts of magnesium oxide powder with a diameter of 2.3 μm, 42 parts of soaked mung beans, 6 parts of acrylamide, 0.6 parts of methylenebisacrylamide, 0.02 parts of ammonium persulfate, and 0.2 parts of dispersant.

[0071] With above-mentioned proportioning, implement according to the following steps:

[0072] (1) Mix alumina powder, magnesium oxide powder, methacrylamide, methylene bisacrylamide and dispersant with water, and planetary ball mill for 4 hours to prepare a stable suspension with a solid content of 50 vol.%.

[0073] (2) Soak the mung bean in the suspension to make it completely swollen and the surface is slightly pulverized, then take it out and dry it in the air until there is no moisture on the surface. Then the soaked mung beans are made into a template, the prepared stable suspension is injected into the template, an...

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Abstract

The invention relates to the fields of ceramics, and particularly discloses a preparation method of porous ceramics with concentric holes and the porous ceramics. The method comprises the steps that (1), suspension gel mold injection slurry is prepared, organic monomers, a crosslinking agent, a dispersing agent and deionized water are firstly mixed, ceramic powder is added, and therefore the suspension gel mold injection slurry with the solid content of 35-60% is prepared; (2), a pore forming agent is soaked to prepare a template; (3), a catalyst and an initiator are added to the slurry prepared in step (1), the slurry is injected into the template, and a green body is obtained after the demolding of the gel is conducted; (4), degreasing is conducted on the dried green body, then sinteringis conducted, and therefore the porous ceramics with the concentric holes are obtained. By means of the method, the porous ceramics with the concentric holes can be prepared, the specific surface area of the porous ceramics is larger, and the porous ceramics is suitable for filtering and catalyst carriers.

Description

technical field [0001] The invention relates to the field of ceramics, in particular to a method for preparing porous ceramics with concentric holes and the porous ceramics. Background technique [0002] Porous ceramic material is a kind of ceramic material with opening aperture and high opening porosity, which is made of high-quality raw materials such as corundum sand, silicon carbide, cordierite, etc., through molding and high-temperature sintering process. , anti-acid, alkali and organic medium corrosion, good biological inertness, controllable pore structure and high opening porosity, long service life, good product regeneration performance, etc., can be applied to precision filtration and separation of various media, High-pressure gas exhaust silencer and electrolytic diaphragm, etc. It has the following characteristics: First, the porosity is high, and the important feature of porous ceramics is that it has more uniform and controllable pores. Stomata can be divided...

Claims

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Application Information

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IPC IPC(8): C04B35/577C04B35/117C04B35/185C04B35/622C04B38/06
CPCC04B35/117C04B35/185C04B35/565C04B35/622C04B38/067C04B38/0675C04B2235/3217C04B2235/3206C04B2235/3244C04B2235/5436C04B2235/6023C04B2235/6567C04B2235/656C04B2235/96C04B38/0074
Inventor 郭新爽万力肖林峰彭霞曹勤李诗咏宋鹏辉
Owner PINGXIANG UNIV
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