Process for forming mullite

Details Process for forming mullite Process for forming mullite

C - Chemistry, Metallurgy

04

B

25/141, 261/20

C04B 35/64 (2006.01) C04B 35/111 (2006.01) C04B 35/18 (2006.01) H05K 1/03 (2006.01)

Patent

CA 1118799

Abstract A method of forming ceramic material which includes mullite (3A)203?2S1O2) in any desired percentage. A particulate mixture is formed of (l) mullite in an amount of at least 3% by weight. (2) Al203 in an amount such that it is from stoichiometric to excess as necessary to form the desired mullite less the initially added mullite and (3) glass in an amount to provide sufficient S102 to combine with Al203 to form the desired mullite. The mix- ture is sintered to a temperature in the range of 1300°C to 1800°Cwherein the Al203 and SiO2 react to form mullite under the in- fluence of the initially added mullite.

322974

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