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Preparation method of high-porosity aluminum oxide ceramic filter
The invention relates to a preparation method of high-porosity aluminum oxide ceramic filter. The preparation method comprises the following steps: preparing aluminum oxide compound powder and aluminum oxide ceramic slurry; freezing and forming the slurry; lyophilizing a frozen blank; and sintering a dried blank. The preparation method specifically comprises the following steps: respectively dissolving soluble aluminum salt, titanium salt, magnesium salt, yttrium salt, lanthanum salt and cerium salt in deionized water, gathering one or more ammonia solutions in the solution to form a mixed solution and settling, and carrying out vacuum filtration, washing by deionized water, drying and calcining to obtain aluminum oxide compound powder; uniformly mixing a tertiary butanol solvent, a dispersant and an adhesive to prepare a premixed solution, ball-milling the aluminum oxide compound powder and the premixed solution at constant temperature, and degassing in vacuum to prepare suspended slurry; freezing and forming the slurry at a temperature lower than the solification temperature of the solvent; lyophilizing the formed frozen blank to obtain a porous blank body; and firing the blank body at a low temperature and sintering the blank body at a high temperature to obtain the aluminum oxide ceramic filter. The whole process is free of any pore forming materials and pollution-free and is an ideal method for preparing the directional high-porosity and high-strength ceramic filter.
Preparation method of high-porosity aluminum oxide ceramic filter
The invention relates to a preparation method of high-porosity aluminum oxide ceramic filter. The preparation method comprises the following steps: preparing aluminum oxide compound powder and aluminum oxide ceramic slurry; freezing and forming the slurry; lyophilizing a frozen blank; and sintering a dried blank. The preparation method specifically comprises the following steps: respectively dissolving soluble aluminum salt, titanium salt, magnesium salt, yttrium salt, lanthanum salt and cerium salt in deionized water, gathering one or more ammonia solutions in the solution to form a mixed solution and settling, and carrying out vacuum filtration, washing by deionized water, drying and calcining to obtain aluminum oxide compound powder; uniformly mixing a tertiary butanol solvent, a dispersant and an adhesive to prepare a premixed solution, ball-milling the aluminum oxide compound powder and the premixed solution at constant temperature, and degassing in vacuum to prepare suspended slurry; freezing and forming the slurry at a temperature lower than the solification temperature of the solvent; lyophilizing the formed frozen blank to obtain a porous blank body; and firing the blank body at a low temperature and sintering the blank body at a high temperature to obtain the aluminum oxide ceramic filter. The whole process is free of any pore forming materials and pollution-free and is an ideal method for preparing the directional high-porosity and high-strength ceramic filter.
Preparation method of high-porosity aluminum oxide ceramic filter
HU JINLING (author) / HAN SHAOJUAN (author) / XU ZHUANGZHI (author) / XUE JIAN (author) / WU XUEKUN (author)
2015-06-03
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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