Dielectric properties of (1-y)Ca1-xLa2x/3TiO3-y(Li,Nd)1/2TiO3 ceramic system at microwave frequency

被引：76

作者：

Huang, CL ^{[1
]}

Tsai, JT ^{[1
]}

Chen, YB ^{[1
]}

机构：

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

来源：

MATERIALS RESEARCH BULLETIN | 2001年 / 36卷 / 3-4期

关键词：

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

D O I：

10.1016/S0025-5408(01)00528-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The solid solution of dielectric ceramic Ca1-xLa2x/3TiO3 system for the composition range of 0.1 less than or equal to x less than or equal to 0.9 is studied. The crystal structure of the system is single perovskite. From the X-ray diffraction patterns, the superstructure reflection lines are detected for the composition x greater than or equal to 0.5. With an increase in the substitution amount of La, the permittivity and the temperature coefficient of resonant frequency (TCF) decrease. A maximum Q x f value of 17600 appears at x = 0.4 since that the extrinsic origin for the dielectric loss degrades the e x f value due to the poor grain growth for the composition x greater than or equal to 0.5. (1-y)Ca1-xLa2x/3TiO3-y(Li,Nd)(1/2)TiO3 compounds are introduced to obtain a good temperature stability of resonant. frequency, With x = 0.4, the composition y = 0.5 shows good temperature stability (tau (f) = +4.5ppm/degreesC) with a high permittivity of 105 and Q x f value of 7000 GHz. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：547 / 556

页数：10

共 10 条

[1] X-RAY STUDY OF DEFICIENT PEROVSKITE LA2-3TIO3 [J].