Improved high Q value of CaTiO3-Ca(Mg1/3Nb2/3)O3 solid solution with near zero temperature coefficient of resonant frequency

被引：51

作者：

Huang, CL

Chen, HL

Wu, CC

机构：

[1] Natl Cheng Kung Univ, Dept Elect Engn, Tainan 70101, Taiwan

[2] Tainan Womans Coll Art & Technol, Tainan, Taiwan

来源：

MATERIALS RESEARCH BULLETIN | 2001年 / 36卷 / 09期

关键词：

ceramics; oxides; X-ray diffraction; dielectric properties;

D O I：

10.1016/S0025-5408(01)00652-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The crystal structures and the microwave dielectric properties of (1-x)CaTiO3-xCa(Mg1/3Nb2/3)O-3 perovskite ceramic system have been investigated, (1-x)CaTiO3-xCa(Mg1/3Nb2/3)O-3 solid solution exhibited orthorhombic crystal structures for all compositions. With x = 0.66, a new microwave dielectric ceramic material 0.34CaTiO(3)-0.66Ca(Mg1/3Nb2/3)O-3 applicable to microwave devices is suggested and possesses the dielectric properties of a dielectric constant epsilon (r) similar to 48, a QXf values similar to 32,500 (at 6.7 GHz) and a tau (f) value similar to -2 ppm/degreesC at 1450 degreesC for 3 h. Further improvement of the QXf value can be achieved by extending the sintering time to 6 h, It reveals a higher QXf value of 34,000 (at 6.7 GHz) without degrading other microwave dielectric properties of 0.34CaTiO(3)-0.66Ca(Mg1/3Nb2/3)O-3 ceramics. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：1645 / 1652

页数：8

共 9 条

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