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Method for preparing high-porosity in-situ grown magnesium borate whisker porous ceramics
The invention discloses a method for preparing high-porosity in-situ grown magnesium borate whisker porous ceramics. The method is that basic magnesium carbonate and boric acid are used as the raw materials; nitrate is used as a catalyst; sodium methyl cellulose is used as a binder; and polyacrylamide is used as a dispersing agent. The method comprises the steps of (1) mixing the materials through a ball mill; (2) preparing slurry; (3) shaping by injection molding and directionally freezing and curing; (4) freezing and drying in a vacuum condition; (5) sintering at the normal temperature; and (6) washing. Compared with the prior art, the method has the advantages that the in-situ grown magnesium borate whisker porous ceramics with high porosity reaching 85% can be prepared, the problem of relatively low porosity of the in-situ grown magnesium borate whisker porous ceramics prepared by the prior art can be solved, and the problem that non-uniform material mixing leads to non-uniform growing of whiskers in the magnesium borate whisker porous ceramics preparation process can be solved.
Method for preparing high-porosity in-situ grown magnesium borate whisker porous ceramics
The invention discloses a method for preparing high-porosity in-situ grown magnesium borate whisker porous ceramics. The method is that basic magnesium carbonate and boric acid are used as the raw materials; nitrate is used as a catalyst; sodium methyl cellulose is used as a binder; and polyacrylamide is used as a dispersing agent. The method comprises the steps of (1) mixing the materials through a ball mill; (2) preparing slurry; (3) shaping by injection molding and directionally freezing and curing; (4) freezing and drying in a vacuum condition; (5) sintering at the normal temperature; and (6) washing. Compared with the prior art, the method has the advantages that the in-situ grown magnesium borate whisker porous ceramics with high porosity reaching 85% can be prepared, the problem of relatively low porosity of the in-situ grown magnesium borate whisker porous ceramics prepared by the prior art can be solved, and the problem that non-uniform material mixing leads to non-uniform growing of whiskers in the magnesium borate whisker porous ceramics preparation process can be solved.
Method for preparing high-porosity in-situ grown magnesium borate whisker porous ceramics
CHEN SHANHUA (author) / GU LIHUAN (author) / SUN GANG (author) / CHEN BO (author) / CHENG JUNCHAO (author) / JIANG ZHIPENG (author)
2015-04-01
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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