摘要
应用溶胶－凝胶方法合成了ＹＳＺ（Ｚｒ０２＋９ｍｏｌ％Ｙ３Ｏ３）超细粉末。对凝胶形成超细粉末的热分解及晶化过程用ｘ射线衍射（ＸＲＤ）和热重一差热（ＴＧ－ＤＴＡ）等分析方法进行了研究。试验表明，溶胶一凝胶法制备ＹＳＺ超细粉末的反应过程分为：水份和有机溶剂的挥发；有机基团的燃烧和无定形Ｚｒ０２的形成；无定形Ｚｒ０２向立方相Ｚｒ０２的转变三个阶段。在４７０℃时，凝胶转变为ＹＳＺ固溶体，形成立方相Ｚｒ０２结构。
Ultrafine YSZ powders were prepared by sol--gel method. The decomposition and crystalliztion process from gel to YSZ powders were investigated by using XRD and TG--DTA. The results show that the reactions in preparing ultrafine YSZ powders by sol--gel method can be divided into three stages: evaporation of residual water and organic of amorphous zirconia; transition from the amorphous zirconia into cubic phase zirconia. The gel transit into YSZ solid solution near 470℃, at witct the cubic phase of yttria-stabilized zirconia(YSZ) forms.
出处
《材料科学与工艺》
EI
CAS
CSCD
1997年第2期49-52,共4页
Materials Science and Technology
