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Porous silicon carbide ceramic and preparation method thereof
The invention relates to porous silicon carbide ceramic and a preparation method thereof. The preparation method comprises the following steps: mixing silicon carbide, aluminum hydroxide, fumed silica, water, a dispersant and a binder so as to obtain slurry, wherein the sum of the mass of aluminum hydroxide and fumed silica accounts for 5 to 30% of the sum of the mass of silicon carbide, aluminum hydroxide and fumed silica, and a mol ratio of aluminum hydroxide to fumed silica is 2-5: 1; drying the slurry so as to obtain mixed powder; molding the mixed powder to obtain a green body; and sintering the green body in an air atmosphere at 1310 to 1340 DEG C so as to obtain the porous silicon carbide ceramic. The preparation method can prepare the porous silicon carbide ceramic with good bending resistance at a low sintering temperature.
Porous silicon carbide ceramic and preparation method thereof
The invention relates to porous silicon carbide ceramic and a preparation method thereof. The preparation method comprises the following steps: mixing silicon carbide, aluminum hydroxide, fumed silica, water, a dispersant and a binder so as to obtain slurry, wherein the sum of the mass of aluminum hydroxide and fumed silica accounts for 5 to 30% of the sum of the mass of silicon carbide, aluminum hydroxide and fumed silica, and a mol ratio of aluminum hydroxide to fumed silica is 2-5: 1; drying the slurry so as to obtain mixed powder; molding the mixed powder to obtain a green body; and sintering the green body in an air atmosphere at 1310 to 1340 DEG C so as to obtain the porous silicon carbide ceramic. The preparation method can prepare the porous silicon carbide ceramic with good bending resistance at a low sintering temperature.
Porous silicon carbide ceramic and preparation method thereof
LIN YONGZHAO (author) / XIANG QIJUN (author) / TAN YICHENG (author)
2016-02-03
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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