Method for producing aluminum titanate sintered compact
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United States of America Patent
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Dec 12, 2006
Grant Date -
Aug 18, 2005
app pub date -
Apr 16, 2003
filing date -
Apr 26, 2002
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Abstract
The present invention provides a raw material composition for preparing a sintered body of aluminum titanate, the composition comprising (i) 100 parts by weight of a mixture comprising 40 to 50 mol % of TiO.sub.2 and 60 to 50 mol % of Al.sub.2O.sub.3, (ii) 1 to 10 parts by weight of an alkali feldspar represented by the formula: (Na.sub.xK.sub.1-x)AlSi.sub.3O.sub.8 (0.ltoreq.x.ltoreq.1), and (iii) 1 to 10 parts by weight of at least one Mg-containing component selected from the group consisting of a Mg-containing oxide with spinel structure, MgCO.sub.3 and MgO, and a process for preparing a sintered body of aluminum titanate comprising sintering a formed product prepared from the raw material composition at 1300 to 1700.degree. C. According to the present invention, a sintered body of aluminum titanate having high mechanical strength and ability to be stably used at high temperatures, as well as its inherent properties of low coefficient of thermal expansion and high corrosion resistance, can be obtained.
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