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.
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页码：1645 / 1652
页数：8
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