New dielectric material system of x(Mg0.95Zn0.05Ti)O3-(1-x)Ca0.8Sm0.4/3TiO3 at microwave frequency

被引：14

作者：

Chen, Yuan-Bin ^{[1
]}

Huang, Cheng-Liang ^{[2
]}

Tasi, Shin-Tung ^{[2
]}

机构：

[1] Chang Jung Christian Univ, Dept Engn & Management, Tainan 71101, Taiwan

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

来源：

MATERIALS LETTERS | 2008年 / 62卷 / 15期

关键词：

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

D O I：

10.1016/j.matlet.2007.12.028

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructures and the microwave dielectric properties of the x(Mg0.95Zn0.05)TiO3-(1-x) Ca0.8Sm0.4/3TiO3 ceramic system were investigated. In order to achieve a temperature-stable material, we studied a method of combining a positive temperature coefficient material with a negative one. Ca0.8Sm0.4/3TiO3 has dielectric properties of dielectric constant epsilon(r) similar to 120, Q x f value similar to 13,800 GHz and a large positive tau(f) value similar to 400 ppm/degrees C. (Mg0.95Zn0.05)TiO3 possesses high dielectric constant (epsilon(r) similar to 16.21), high quality factor (Q x f value similar to 210,000 at 9 GHz) and negative tau(f) value (-59 ppm/degrees C). Sintering at 1300 degrees C with x=0.9, 0.9(Mg0.95Zn0.05Ti)O-3-0.1 Ca0.8Sm0.4/3TiO3 has a dielectric constant (epsilon(r)) of 22.7, a Q x f value of 124,000 GHz and a temperature coefficient of resonant frequency (tau(f)) of -6.3 ppm/degrees C. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：2454 / 2457

页数：4

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