Effects of Sm substitution on microwave dielectric properties of Ba4La9.33(Ti0.95Zr0.05)18O54 ceramics

被引：9

作者：

Gao, Xufang ^{[1
]}

Qiu, Tai ^{[1
]}

机构：

[1] Nanjing Univ Technol, Coll Mat Sci & Engn, Nanjing 210009, Jiangsu, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 502卷 / 02期

关键词：

Dielectric response; Ceramics; Sintering; Rare earth alloys and compounds; Microstructure; ZERO-TEMPERATURE COEFFICIENT; SOLID-SOLUTIONS; BA6-3XR8+2XTI18O54 R; CRYSTAL-STRUCTURE; LA; MICROSTRUCTURES; R=ND; PR;

D O I：

10.1016/j.jallcom.2010.01.033

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Sm substitution for La was investigated for the modification of Ba4La9.33(Ti0.95Zr0.05)(18)O-54 ceramics. A single-phase solid solution with tungstenbronze-like structure formed in the whole range of y values in Ba-4(La1-ySmy)(9.33)(Ti0.95Zr0.05)(18)O-54 ceramics, As Sm content increased, there was a constriction of the b-axis and c-axis, and decrease in the cell volume. The Qf value did not obey the mixing rules and it varied nonlinearly with composition y. Small levels of Sm substitution improved the Qf value with a decrease of dielectric constant. The temperature coefficient of resonant frequency varied from positive to negative and decreased continuously with the increase of Sm content. A near zero tau(f) value (-2.38 x 10(-6)/degrees C) was obtained at the composition of y = 0.7. (C) 2010 Published by Elsevier B.V.

引用

页码：333 / 337

页数：5

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