| 摘要 |
PURPOSE:To obtain the titled powder enabling the production of the high-density sintered body of Al2O3 and ZrO2 with an atmospheric sintering method by calcining the composite deposit of Al2O3 and a Zr compd. obtained from an aq. dispersion contg. a Zr salt, Al2O3 powder, and a precipitant. CONSTITUTION:An aq. dispersion contg. a Zr salt (e.g., ZrOCl2) or a Zr salt and a stabilizer (e.g., Y2O3), Al2O3 powder, and a precipitant (an excess of aq. ammonia over the Zr salt) is agitated to form a composite deposit of the Al2O3 and the Zr compd. The obtained composite deposit is washed with water, dried, and calcined preferably at about 900 deg.C to produce the Al2O3-ZrO2 composite powder. Low-temp. sintering is made possible by using the composite powder produced by this method as the raw material, the sintered body can be densified without the growth of the crystal grain, and consequently an Al2O3-ZrO2 sintered body having stabilized strength and excellent durability under mechanical and thermal stress can be produced. |
