Abstract
Mullite precursor is prepared by partial hydrolysis method of metal alkoxides and then mixed with zirconium alkoxide to yield homogeneous and fine mullite-zirconia composite powder with the mean particle size of about 60 nm at 1200°C. Fairly amount of tetragonal zirconia was identified by X-ray diffraction in the temperature range from 1200 to 1700°C because of the combination of the surface energy effect and the constraint of the rigid mullite-matrix.
