摘要
通过控制沉淀过程pH值以及粉体颗粒度,制得了一种四方相纯氧化锆粉体。在应力诱导下,这种四方相纯氧化锆粉体部分能发生相变。其相变临界粒径小于180A,它的亚稳保留受凝胶先驱体结构及临界粒径双重控制。
Tetragonal pure zirconia powders which can partially transform to monoclinic phase under stress inducement were prepared by controlling the final pH for precipitation of zirconia gel and the particle size. It is estimated that the transformation critical particle size of tetragonal pure zirconia powders is less then 180A,and the metastabilization of tetragonal pure zirconia powders is controlled both by the structure of zirconia gel precursor and the critical particle size.
