Crystal structure refinement and microwave dielectric properties of new low dielectric loss AZrNb2O8 (A: Mn, Zn, Mg and Co) ceramics

被引：126
|
作者：
Ramarao, S. D. [1 ]
Murthy, V. R. K. [1 ]
机构：
[1] Indian Inst Technol Madras, Dept Phys, Microwave Lab, Madras 600036, Tamil Nadu, India
来源：
SCRIPTA MATERIALIA | 2013年 / 69卷 / 03期
关键词：
Rietveld refinement; Packing fraction; Octahedral distortions; Microwave dielectric properties; W CERAMICS; NI; FREQUENCIES; MO;
D O I：
10.1016/j.scriptamat.2013.04.018
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effects of substituting different cations (Mn, Zn, Mg and Co) at the A-site of AZrNb(2)O(8) compounds on structural parameters such as packing fraction and B-site octahedral distortion were studied using X-ray powder diffraction in conjunction with Rietveld refinement. Variations in the dielectric constant (epsilon(r)) were explained by the ionic polarizability of the compositions. The quality factor (Q x f) and temperature coefficient of resonant frequency (tau(f)) were correlated with the packing fraction and B-site octahedral distortions (delta) in these compositions, respectively. (c) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：274 / 277
页数：4
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