Effect of sintering aid CuO-MnO2 on dielectric properties of 0.5Ba(Mg1/3Nb2/3)O3-0.5Ba(Ni1/3Nb2/3)O3 ceramics

被引：4

作者：

Tian Zhongqing ^{[1
]}

Zhang Chunyan ^{[1
]}

Wang Hao ^{[2
]}

Huang Weijiu ^{[1
]}

Lin Lin ^{[1
]}

机构：

[1] Chongqing Inst Technol, Sch Mat Sci & Engn, Chongqing 400050, Peoples R China

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

来源：

JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION | 2009年 / 24卷 / 01期

关键词：

ceramics; oxides; X-ray diffraction; dielectric properties; BA(MG1/3TA2/3)O-3 CERAMICS; MICROWAVE FREQUENCY; MICROSTRUCTURE; BA(ZN1/3TA2/3)O-3; RESONATOR; ADDITIVES; SYSTEM; PHASE; CUO;

D O I：

10.1007/s11595-009-1123-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Microstructures and microwave dielectric properties of 0.5Ba(Mg1/3Nb2/3)O-3-0.5Ba(Ni1/3Nb2/3)O-3 ceramics with x wt% CuO-x wt% MnO2 additions (x=0.25-1) prepared by conventional solid-state route were investigated. It is found that low level-doping of CuO-MnO2 can significantly improve the density of the specimens and their microwave dielectric properties. The relative density of 0.5Ba(Mg1/3Nb2/3)O-3-0.5Ba(Ni1/3Nb2/3)O-3 ceramics can be increased by 95% sintering at 1 330 A degrees C due to the liquid phase effect. The second phase is not observed in ceramics with CuO-MnO2 addition. The parameter epsilon (r) increases with increasing sintering temperature, and Q (f) is effectively promoted by CuO-MnO2 addition. Higher CuO-MnO2 content would make tau(f) value more positive. Meanwhile, epsilon (r) value of 30.5, Q (f) value of 63 200 GHz and tau (f) value of 0.5 ppm/A degrees C were obtained for 0.5Ba(Mg1/3Nb2/3)O-3-0.5Ba(Ni1/3Nb2/3)O-3 ceramics with 0.5 wt% CuO-0.5 wt% MnO2 addition sintered at 1 330 A degrees C for 4 h.

引用

页码：123 / 126

页数：4

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