摘要
采用固相合成法在氧化钇部分稳定氧化锆(YSZ)陶瓷材料的基础上引入氧化物Ta2O5以及稀土氧化物La2O3取代部分Y2O3,获得一种新型的La2O3-ZrO2-Y2O3-Ta2O5陶瓷材料。分别利用X射线衍射仪、扫描电子显微镜和STA-449C热膨胀仪对材料的物相组成、微观结构及热膨胀性能进行表征。结果表明,陶瓷材料的主晶相仍为四方相,晶粒尺寸减小,在RT~1200℃温度范围内热膨胀系数有所减小。
La2O3 and Ta2O5 co-doped with yttria partially stabilized zirconia(YSZ) was prepared by solid phase synthesis method.The phase structure was analysed by XRD,the fracture surface was observed by SEM,and the thermal expansion coefficient of ceramic materials was tested.The results showed that the ceramic was mainly consist of tetragonal phase,with the increased mole fracion of the La2O3,the size of grains,the thermal expansion coefficient and the heat capacity all decreased.
出处
《稀土》
EI
CAS
CSCD
北大核心
2012年第5期22-26,共5页
Chinese Rare Earths
基金
国家自然科学基金项目(50974074)
教育部新世纪优秀人才支持计划(NCET-10-0910)
内蒙古科技大学创新基金项目(2009NC015)
关键词
氧化锆
相结构
显微结构
热膨胀系数
ZrO2
structure
microscopic structure
thermal expansion coefficient