Structure determination and microwave dielectric properties of La(MgSn)0.5O3 ceramics

被引：15

作者：

Babu, G. Santosh ^{[1
]}

Subramanian, V. ^{[1
]}

Murthy, V. R. K. ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Phys, Madras 600036, Tamil Nadu, India

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2007年 / 27卷 / 8-9期

关键词：

La(MgSn)(0.5)O-3; powders-solid state reaction; X-ray methods; dielectric properties;

D O I：

10.1016/j.jeurceramsoc.2006.11.024

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

La(MgSn)(0.5)O-3 (LMS) has been prepared by solid-state reaction method. A single perovskite phase with super lattice reflections corresponding to octahedral tilting, A-site cation displacement and 1:1 B-site ordering was observed in X-ray diffraction pattern. The Rietveld analysis was carried out with the initial model obtained from Structure Prediction and Diagnostics Software (SPuDS). The structure is determined to be monoclinic with space group P2(1)/n corresponding to a(-)a(-)c(+) tilting system. Long range ordering parameter (LRO) between Mg2+ and Sn4+ ions is calculated to be 89%. Dielectric characterization at microwave frequencies is also carried out. The dielectric constant (epsilon(Gamma)), product of quality factor and resonant frequency (Q.f) and temperature coefficient of resonant frequency (tau(f)) of the sample sintered at 1600 degrees C are 20.1, 63,000 (GHz) and -78 (ppm/degrees C), respectively. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：2973 / 2976

页数：4

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