摘要
Zirconia is an important material of transformation toughening. Consequently, a clear understanding of the regularity of phase transformation, a full realization of all forms of zirconia, and a deep investigation into the methods of preparation and even dispersion of high purity ZrO<sub>2</sub> ultrafine particles （henceforth simplified as ZrO<sub>2</sub> UFP ） will undoubtedly stimu-
