| 摘要 |
PURPOSE:To obtain a stabilized sintered zirconia material having excellent thermal shock resistance and mechanical properties by adding La2O3, Pr2O11/3 or Nd2O3 to a zirconia composition containing Ln, Ho, Er or Yb and sintering the mixture. CONSTITUTION:This sintered zirconia material is produced by adding 0.01-0.5mol% of one or more substances selected from La2O3, Pr2O11/3 and Nd2O3 as a property-improving agent to a zirconia composition having an Ln2O3/ZrO2 molar ratio of 2/98 to 6/94 (Ln is Dy, Ho, Er or Yb). This zirconia composition may be incorporated with <5wt.% of Al2O3 and/or <2wt.% of SiO2 as a sintering assistant. The sintered material can be produced by forming the raw material powder to a prescribed form and sintering at 1300-1700 deg.C in air. |
