Effect of rare earth oxides on the microstructure and microwave dielectric properties of CaO-MgO-Nb2O5-TiO2 system ceramics

被引：0

作者：

Wang, H ^{[1
]}

Chen, W ^{[1
]}

Liu, T ^{[1
]}

机构：

[1] Wuhan Univ Technol, Sch Mat Sci & Engn, Wuhan 430070, Peoples R China

来源：

JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION | 2005年 / 20卷 / 04期

关键词：

perovskite; microwave dielectric ceramic; dielectric properties;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

La2O3 and SrO-doped CaO-MgO-Nb2O5-TiO2 system, ceramics were prepared by solid-state ceramic technique. The microstructure and microwave dielectric properties of CaO-MgO-Nb2O5-TiO2-La2O3 ceramics can be adjusted by varying the amount of La3+ or Sr2+ ions respectively. The replacement of Ca2+ by La3+ at A-site of the ceramics increases the quality factor Q value (at 7.6 GHz) as well as the temperature coefficient of resonant frequency tau(f) and decreases the dielectric constant epsilon(r) and the substitution of Sr2+ at A-site in this ceramics system exhibits opposite characteristics. The microwave properties of La3+, Sr2+-doped CaO-MgO-Nb2O5-TiO2 system ceramics depend on the degree of octahedral distortion, inside materials.

引用

页码：83 / 86

页数：4

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