摘要
用正电子湮没技术,结合X射线衍射结构分析,对掺杂Y2O3的ZnO导电陶瓷烧结过程进行了研究,给出了掺杂含量、烧结温度和烧结时间对材料结构的影响特征,研究发现:Y2O3掺杂量增加,ZnO导电陶瓷材料完整性变差;烧结温度升高,ZnO陶瓷产生微空洞为主的缺陷;烧结时间增加,微空洞缺陷数目明显增加。同时对正电子湮没机制与ZnO陶瓷导电特性的关联进行了研究。
This paper presents the results of study of ZnO conductive ceramics doped with Y2O3 by positron annihilation technique and X-ray diffraction The effects of additive contents, sintering temperature and time on positron lifetime parameter are given The experiment results show that the material deteriorates its perfection when Y2O3 content rise Raising the sintering temperature mainly generates vacancy defects and a long sintering time clearly increases the number of vacancy defects Mechanism of positron annihilation and its correlation with conductivity are discussed
出处
《稀土》
EI
CAS
CSCD
北大核心
2003年第3期31-33,36,共4页
Chinese Rare Earths
基金
国家自然科学基金资助项目(19874017)
关键词
导电陶瓷
正电子湮没
缺陷
conductive ceramics
positron annihilation
defect
