Improved high Q value of 0.5LaAlO3-0.5SrTiO3 microwave dielectric ceramics at low sintering temperature

被引：33

作者：

Huang, CL ^{[1
]}

Hsu, CS ^{[1
]}

机构：

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

来源：

MATERIALS RESEARCH BULLETIN | 2001年 / 36卷 / 15期

关键词：

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

D O I：

10.1016/S0025-5408(01)00757-7

中图分类号：

T [工业技术];

学科分类号：

08 [工学];

摘要：

The dielectric properties and the microstructures of 0.5LaAlO(3)-0.5SrTiO(3) ceramics with B2O3 additions (0.25 - 1 wt%) prepared with conventional solid-state route have been investigated. Doping with B2O3 (up to 0.5 wt%) can effectively promote the densification and the dielectric properties of 0.5LaAlO(3)-0.5SrTiO(3) ceramics. It is found that LaAlO3-SrTiO3 ceramics can be sintered at 1400 degreesC due to the liquid phase effect of B2O3 addition observed by Scanning Electronic Microscopy. The dielectric constant as well as the Q X f value decreases with increasing B2O3 content. At 1430 degreesC, 0.5LaAlO(3)-0.5SrTiO(3) ceramics with 0.25 wt% B2O3 addition possesses a dielectric constant (epsilon (r)) of 34.5, a Q X f value of 43,200 (at 7 GHz) and a temperature coefficient of resonant frequency (tau (f)) of - 10.7 ppm/degreesC. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：2677 / 2687

页数：11

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