STARTING MATERIAL FOR MULLITE SINTERED COMPACT, MULLITE SINTERED COMPACT AND ITS PRODUCTION

摘要

PURPOSE:To provide a mullite sintered compact having high creep resistance without reducing the high strength of a mullite sintered compact at high temp. CONSTITUTION:This starting material for a mullite sintered compact contains =99.5wt.%, in total, of Al2O3 and SiO2 in (71.2-72.5):(28.8-27.5) weight ratio of Al2O3:SiO2 and has =0.05wt.% alkali content and 0.05-0.50 weight ratio of ZrO2.