| 摘要 |
PROBLEM TO BE SOLVED: To produce an aluminous sintered compact having high strength in the temp. range from room temp. to a high temp. SOLUTION: Alumina powder having <=2μm average particle diameter is mixed with 0.001-50vol.% silicon oxynitride powder having <=1μm average particle diameter or 0.001-50vol.% (expressed in terms of silicon oxynitride) organosilicon compd. convertible into an inorg. compd. having an Si-N-O bond by thermal decomposition, e.g. polysilazane or polycarbosilane, and the resultant mixture is compacted in a prescribed shape and fired at >=1,200 deg.C to obtain the objective high strength aluminous sintered compact contg. 0.001-50vol.% dispersed inorg. crystal grains having <=1μm average grain diameter and Si-N-O bonds in the alumina crystal grains and on the grain boundaries of the alumina matrix having <=10μm average grain diameter. |
