Densification, microstructural evolution, and dielectric properties of CaTiO3-LaGaO3 microwave ceramics

被引：12

作者：

Wang, Sea-Fue ^{[1
]}

Wang, Yuh-Ruey ^{[1
]}

Hsu, Jen-Chun ^{[1
]}

机构：

[1] Natl Taipei Univ Technol, Dept Mat & Minerals Resources Engn, Taipei 106, Taiwan

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2011年 / 72卷 / 09期

关键词：

Oxide; Electron microscopy; X-ray diffraction; Dielectric properties; SOLID-SOLUTION; SYSTEM; FREQUENCIES;

D O I：

10.1016/j.jpcs.2011.05.009

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The relations among the densification, microstructural evolution, and microwave dielectric properties of the (1-x)CaTiO3-xLaGaO(3) ceramics with x=0.34 and 0.36 were investigated in this study. The results indicated that (1-x)CaTiO3-LaGaO3 ceramics can be densified at 1300 degrees C with at least 97% of the theoretical value. The ceramics reported an orthorhombic perovskite structure, and no other detectable phases were found. Both epsilon(r) and Qxf values can be improved by slowing the cooling rate during sintering. The epsilon(r) and Qxf values of the 0.64CaTiO(3)-0.361.aGaO(3) ceramics at cooling rates of > 10 degrees C/min and 0.1 degrees C/min are 48.1 and 27,500 and 48.7 and 38,000, respectively. The higher densification obtained at a slower cooling rate plays an important role in improving the microwave dielectric properties. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：1011 / 1014

页数：4

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