Calcium-doped MgTiO3-MgTi2O5 ceramics prepared using a reaction-sintering process

被引：37

作者：

Liou, Yi-Cheng ^{[1
]}

Yang, Song-Ling ^{[1
]}

机构：

[1] Kun Shan Univ, Dept Elect Engn, Tainan 71003, Hsien, Taiwan

来源：

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY | 2007年 / 142卷 / 2-3期

关键词：

magnesium titanate; reaction-sintering process; calcium;

D O I：

10.1016/j.mseb.2007.06.027

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Calcium-doped MgTiO3-MgTiO5 (MCT) ceramics prepared using a reaction-sintering process were investigated. Without any calcination involved, the mixture of MgO, CaCO3, and TiO2 was pressed and sintered directly. MCT ceramics were obtained after 2-6 h sintering at 1150-1250 degrees C. MCT containing high percentage of MgTi2O5 phase (45.6%) was observed at 1150 degrees C/2h sintering and the percentage decreased to 37.2% at 1300 degrees C/2 h sintering. The maximum density 3.85 g/cm(3) could be obtained at 1250 degrees C. Dielectric constant at 10MHz reaches 23.7-25.9 in MCT ceramics sintered at 1150 and 1200 degrees C. epsilon(r) =22.4 and Qxf similar to 40,400 GHz (at 9.8 GHz) and a tau(f) value of -9.6ppm/degrees C were obtained in MCT ceramic sintered at 1300 degrees C/2 h. The reaction-sintering process has been proven a simple and effective method to produce dense MCT ceramics with good dielectric properties even without the addition of sintering aid. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：116 / 120

页数：5

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