摘要
本文用化学共沉淀法制备了Ｓｃ２Ｏ３稳定的ＺｒＯ２纳米超细粉．用ＸＲＤ、ＴＥＭ、ＳＥＭ以及ＢＥＴ测比表面等方法分析了粉体和烧结体的相组成显微结构及其性能．实验结果表明６．０、７．８、９．６ｍｏｌ％Ｓｃ２Ｏ３掺杂量的粉体易于烧结，而３．５、１２．０ｍｏｌ％Ｓｃ２Ｏ３掺杂量的粉体则不易烧结，原因在于样品冷却过程中相变引起的体积变化以及烧结体中双重显微结构的存在．为得到相组成较为单一、且稳定的ＺｒＯ２固体电解质，Ｓｃ２Ｏ３掺杂量直选在７．８ｍｏｌ％附近．
Nanometer zirconia ultrafine powders stabilized with scandia were prepared by chemical co-precipitation.The powders and their sintered specimens were studied by means of XRD,TEM, SEM and BET specific surface area techniques. It shows that zirconia powders stabilized with 6.0mol%, 7.8mol% and 9.6mol%scandia have good sinterability, while the specimens stabilized with 3.5mol% and 12.0mol% scandia are softly sintered, which is attributed to the exisence of dual microstructure and the volume change resulting from phase transitions when the specimens are cooled from sintering temperature. In order to obtain Zirconia solid electrolyte composed of simple and stable phases, the content of scandia near 7.8mol% should be selected.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
1996年第2期247-252,共6页
Journal of Inorganic Materials
关键词
超细粉
烧结
固化电解质
氧化锆
氧化钪
制备
zirconia stabilized with scandia,nanometer ultrafine powders,chemical co-precipitation,sintering,solid electrolyte
