Alumina sintered body and method for producing the same
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United States of America Patent
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Jan 30, 2007
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N/A
app pub date -
Nov 24, 2004
filing date -
Nov 27, 2003
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Abstract
An alumina sintered body having communicating pores of 400 1100 .ANG. in average pore diameter and 4 16% in porosity and being obtainable by mixing first alumina particles 1 having a particle diameter of 0.2 0.7 .mu.m and a sphericity of 0.7 1.0 as an aggregate and second alumina particles having a particle diameter of 0.01 0.1 .mu.m as a pore forming material to embed a plurality of the second alumina particles 2 in the spaces between the first alumina particles 1, and sintering the mixture at a temperature of 1200 1400.degree. C. The alumina sintered body can be used for a part for various gas permeable industrial materials inclusive of protective film for gas sensors, and the like.
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