| 摘要 |
PURPOSE:To obtain the title ceramic having excellent mechanical strength, fracture toughness, wear resistance, etc., at a low cost by adding cerium oxide powder as a stabilizing agent to a mixture of alumina powder and zirconia powder, forming, and calcining the admixture. CONSTITUTION:From 600-90wt.% alumina powder or perferably easy-tosinter alumina powder having <=10mum alpha-crystal grain diameter, 9-37wt.% zirconia powder or preferably high-purity zirconia powder to be used for piezoelectric ceramics, and 1-10wt.% CeO2 powder as the stabilizing agent are mixed. The mixture is formed, and then calcined at 1480-1700 deg.C to obtain an alumina ceramic contg. zirconia. The crystal phase of the ceramic is preferably composed essentially of a tetragonal zirconia crystal and an alpha-alumina crystal. |
