Effect of La2O3 substitutions on structure and dielectric properties of Bi2O3-ZnO-Nb2O5-based pyrochlore ceramics

被引：29

作者：

Wang, H ^{[1
]}

Zhang, DS ^{[1
]}

Wang, XL ^{[1
]}

Yao, X ^{[1
]}

机构：

[1] Xian Jiao Tong Univ, Elect Mat Res Lab, Xian 710049, Peoples R China

来源：

JOURNAL OF MATERIALS RESEARCH | 1999年 / 14卷 / 02期

关键词：

Number:; -; Acronym:; XJTU; Sponsor: XiâÇÖan Jiaotong University;

D O I：

10.1557/JMR.1999.0078

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of La2O3 substitutions on structure and dielectric properties of Bi2O3-ZnO-Nb2O5-based ceramics was investigated. Bi1.5-xLaxZn0.5(Zn0.5Nb1.5)O-7 samples were prepared by conventional ceramic processing technology. The crystal structure of the Bi1.5Zn0.5(Zn0.5Nb1.5)O-7 Sample was characterized as a pure cubic pyrochlore. With a lower amount of La2O3 substitution, the crystal structures were still cubic pyrochlore. Superlattice x-ray diffraction line was identified for some compositions. With the increasing amount of La2O3 substitution, the crystal structure gradually transformed from pure cubic pyrochlore to LaNbO4 phase. The dielectric properties regularly changed with the structure change. The structure-properties relations of the ceramics are discussed.

引用

页码：546 / 548

页数：3

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