摘要
采用化学共沉淀法制得了氧化铈摩尔含量在2%-12%之间的CeO2/ZrO2复合纳米粉体。研究了随着氧化铈含量的增加,氧化锆组分由单斜相(m)到四方相(t)转变的过程,并分析了影响相变的主要因素。从X射线衍射图谱(XRD)和透射电镜图(TEM)可以得出:随着氧化铈摩尔含量的增加,氧化锆四方相体积分数也随之增加,二者基本呈线性关系,当氧化铈含量为12mol%时,氧化锆在室温下被完全稳定在四方相,离子置换固溶体的形成是使四方相稳定在室温下的主要原因。
CeO2/ZrO2 nano-powders containing 2% - 12% (tool) CeO2 are prepared by chemical co-precipitation method. The volume fraction f tetragonal ZrO2 is studied with the change of celia tool content, and the factors affecting phase transformation are analyzed. The results of XRD and TEM show that the tetragonal fraction increases linearly with the elevation of ceria tool content. Tetragonal zirconia is stabilized completely at room temperature as celia content reaches 12mol%. The primary factor stabilized tetragonal phase is ion replacement of cerium and zirconium,
出处
《材料导报》
EI
CAS
CSCD
北大核心
2005年第F05期201-202,208,共3页
Materials Reports
基金
山东省自然科学基金项目(Y2000F08)