制备工艺对超细氧化钪透明陶瓷粉体性能的影响

Influence of Processing Conditions on Property of Ultrafine Powder of Transparent Sc_2O_3 Ceramics

以六次甲基四胺为沉淀剂,研究了不同液相反应温度、陈化时间、洗涤方式及煅烧温度对超细氧化钪粉体性能的影响。在液相反应温度为20和80℃均合成出絮状的前驱沉淀物,前躯体的晶化程度和煅烧产物的粒度均随着反应温度的提高而增加。在陈化溶液环境中,随着陈化时间的增加,粒子逐渐均匀长大。只用水洗涤的粉体产生了轻微团聚的现象,经水-无水乙醇洗涤的粉体分散性得到改善,而用水-无水乙醇-丙酮洗涤的颗粒分散更好。煅烧产物的尺寸随着煅烧温度的提高而增加。

The influence of reaction temperature,aging time,washing methods and calcination temperature of the precipitate precursors on ultrafine Sc2O3 powder which was synthesized using hexamethylenetetramine as a precipitating agent was investigated.The precipitation precursor with a floccule structure was synthesized at 20 and 80 ℃,respectively.The crystallinity of the precursor increased alone with elevated reaction temperature.The resultant Sc2O3 powder would grow following elevated reaction temperature,aging time and calcination temperature.The calcined powder which was only washed by distilled water appeared weak aggregation,however,it was well dispersed via the rinsing processes of distilled water and anhydrous alcohol.By applying the distilled water,ethanol and acetone washing processes,the dispersion of Sc2O3 powder was further improved.