溶胶共沉淀法制备ZrO_2超微粉末新工艺

A New of Preparaing Ultrafine ZrO_2 Powder with Sol coprecipitational Method

制定出以NH4 HCO3 为沉淀剂的溶胶共沉淀法制备超微粉末的新工艺 .工艺参数为 :溶液浓度 1mol/L ;pH值为 5 ;在沉淀和烘干中PVA总质量分数为 10 % ;煅烧工艺 6 0 0℃× 2h .用此工艺可制备出粒度为0 .42 μm 的ZrO2

A new technique from which the ZrO 2 ultrafine powder can be prepared with sol precipitation method (NH 4HCO 3 Precipitant) has been worked out. The optimal technique parameters are: solution concentration 1.0?mol/L; pH=5; total PVA quantity used in deposition and drying w (PVA)=10?%; Calcine technology 600?℃×2?h. The particle size of ZrO 2 powder prepared with this technique is 0.42?μm.