Abstract: Alumina-zirconia composite powders were prepared by two chemical methods, which were Sol-gel method and co-precipitation method, and then characterized by some equipments: size of the granularity was expressed by laser particle size analyzer, phase composition was analyzed by X-ray diffraction (XRD) and distribution of alumina and zirconia at microscopic view was observed by scanning electron microscope (SEM). The experimental results show that compared with co-precipitation method, the powder from Sol-gel method was preferable, of which the granularity was much thinner, the content of tetragonal zirconia was much higher and the distribution of alumina and zirconia was much evener.

Key words: Sol-gel method;co-precipitation method;alumina-zirconia composite powder