x(Mg0.7Zn0.3)0.95Co0.05TiO3-(1-x)(La0.5Na0.5)TiO3 ceramic at microwave frequency with a near zero temperature coefficient of resonant frequency

被引：19
|
作者：
Huang, Cheng-Liang [2 ]
Lin, Shih-Hung [3 ,4 ]
Liu, Shih-Sheng [2 ]
Chen, Yuan-Bin [1 ]
机构：
[1] Chang Jung Christian Univ, Dept Engn & Management Adv Technol, Tainan 71101, Taiwan
[2] Natl Cheng Kung Univ, Dept Elect Engn, Tainan 70101, Taiwan
[3] Natl Taiwan Univ, Grad Inst Elect Engn, Taipei 106, Taiwan
[4] Natl Taiwan Univ, Dept Elect Engn, Taipei 106, Taiwan
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 489卷 / 02期
关键词：
Microwave dielectric; Oxides; X-ray diffraction; Dielectric properties; DIELECTRIC-PROPERTIES; PERMITTIVITY;
D O I：
10.1016/j.jallcom.2009.09.103
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Dielectric properties of x(Mg0.7Zn0.3)(0.95)Co0.05TiO3-(1-x)(La0.5Na0.5)TiO3 ceramic were investigated at microwave frequencies. A nearly 0 ppm/degrees C temperature coefficient of resonant frequency was realized at x = 0.9. A two-phase system was confirmed by XRD analysis. A dielectric material applicable to microwave devices with a Q x f of 20,000-87,000 GHz and a dielectric constant of 21.27-26.2 was obtained at 1100 degrees C after 4 h of sintering. The microwave dielectric material 0.9(Mg0.7Zn0.3)(0.95)Co0.05TiO3-0.1 (La0.5Na0.5)TiO3 sintered at 1150 degrees C for 4 h has a dielectric constant of 24.56, a Q x f of 68,000 GHz, and a tau(f) value of 0 ppm/degrees C. It is proposed as a candidate dielectric for GPS patch antennas. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：541 / 544
页数：4
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