Low temperature sintering and microwave dielectric properties of Ba2Ti9O20 ceramics using glass additions

被引：66

作者：

Huang, CL ^{[1
]}

Weng, MH ^{[1
]}

Lion, CT ^{[1
]}

Wu, CC ^{[1
]}

机构：

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

来源：

MATERIALS RESEARCH BULLETIN | 2000年 / 35卷 / 14-15期

关键词：

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

D O I：

10.1016/S0025-5408(00)00432-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of glass additions on the microwave dielectric properties and the microstructures of Ba2Ti9O20 ceramics were investigated. The simple glasses B2O3 and SiO2 and the commercial glass PbO-B2O3-SiO2 (PBS) were selected as liquid phase sintering aids to lower the sintering temperature of Ba2Ti9O20 ceramics. With glass additions, the sintering temperatures can be effectively lowered. The dielectric properties of Ba2Ti9O20 ceramics with glass additions are strongly dependent on the densification, the microstructure, and the reaction between glasses and ceramics. Ba2Ti9O20 ceramics without glass addition sintered at 1380 degreesC has a dielectric constant epsilon (r) = 38.8, a quality factor Q = 7200 at 6.0 GHz, and a temperature coefficient of resonant frequency tau (f) = 4 ppm/degreesC. Among these glasses, 5 wt% B2O3 added Ba2Ti9O20 can be sintered to achieve theoretical densities of 96 and 95% at 1100 and 1200 degreesC, and gives epsilon (r) values of 36.5 and 36 together with Q values of 3200 and 6700 (at 6 GHz), respectively. Results of XRD analysis and scanning electron microscopy are also presented. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：2445 / 2456

页数：12

共 12 条

[1] MICROWAVE CHARACTERISTICS OF BAO-TIO2 CERAMICS PREPARED VIA A CITRATE ROUTE [J].