Liu Zhenying
(School of Materials Science and Engineering, Anhui Polytechnic University, Huainan 232001)
Abstract:ZrO2 /Al2O3 composite powders with different molar ratios were prepared by co-precipitation method using ZrOCl2·8H2O and AlCI3·6H2O as raw materials and ammonia as precipitator. The Al (OH)3 and Zr (OH)4 colloidal precipitates were produced by controlling the relative content of ZrO2 and Al2O3, adding proper dispersants, adjusting the pH value, controlling the amount and the adding order of the precipitators. Then the colloidal precipitates were calcined to get ZrO2 and Al2O3micrometer and nanometer powders. After pressing and high temperature sintering of these powders, high temperature structural ceramic with baddeleyite and corundum eutectoid fine crystallization was obtained.
Keywords:zirconia, aluminium oxide, composite, structural ceramic