Structure and Dielectric Properties of (Gd0.4Sm0.5Yb0.1)2(Zr1-xCex)2O7 Ceramics

摘要：

　　Complex rare-earth zirconates (Gd0.4Sm0.5Yb0.1)2(Zr1-xCex)2O7 (x=0,0.3,0.4) powders were synthesized by co-precipitation method.XRD and SEM results revealed that the complex rare-earth zirconates with single pyrochlore structure were prepared and no other phases existed among the grains.The dielectric properties of these compounds were investigated at low and microwave frequencies.It was found that they have intermediate dielectric constants and low dielectric loss in the whole frequency region,and they show the dielectric permittivity with weak frequency dependence.Substituting Zr4+ by Ce4+ leaded to smaller permittivity.Meanwhile,the dielectric contant values increase with increasing in the r(A3+)/r(B4+) value in the pyrochlore-type phase region,which can be explained by the increase in the degree of ordering of oxygen vacancy.This new series of pyrochlore type oxides would be potential candidates for electronic ceramic applications and microwave frequency components.

关键词： Complex rare-earth zirconates pyrochlores dielectric properties

作者: Liu Ling Xu Qiang Wang Fuchi

作者单位: School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China

会议类型: 国际会议

会议名称: The Sixth China International Conference on High-Performance Ceramics(第六届中国先进陶瓷国际研讨会(CICC-6))

会议地点: 哈尔滨

会议语种:英文

页码: 394-397

在线出版日期: 2009-08-16（万方平台首次上网日期，不代表论文的发表时间）