| 摘要 |
For producing shaped articles from mixtures of 60 to 40% by weight of Al2O3 and 40 to 60% by weight of ZrO2, the starting mixture is shaped and fired. The shaped article produced according to the invention has a particularly good temperature shock resistance and high elasticity. In the process, a) the starting materials Al2O3 and ZrO2 are used in a purity of at least 99.0%, b) the starting materials are comminuted, separately or together, by fine grinding down to a particle size of less than 90 mu m or, if these already have a particle size of less than 90 mu m, are intimately mixed with one another, c) the mixture obtained in stage b) is either granulated or made up with water to give a slip, and the desired shaped article is formed from the granules or the slip, and dried, d) the shaped article is fired at temperatures of 1400 DEG C to 1800 DEG C and e) the cooling after firing is carried out at such a low rate that ZrO2 changes completely or almost completely to the monoclinic phase. |
