Enhancement of Giant Dielectric Response in CaCu3Ti4O12 Ceramics by Zn Substitution

被引：147

作者：

Ni, Lei ^{[1
]}

Chen, Xiang Ming ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Mat Sci & Engn, Lab Dielect Mat, Hangzhou 310027, Zhejiang, Peoples R China

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2010年 / 93卷 / 01期

基金：

美国国家科学基金会;

关键词：

COPPER-TITANATE; CONSTANT; CONDUCTION;

D O I：

10.1111/j.1551-2916.2009.03384.x

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：

Zn-substituted CaCu3Ti4O12 ceramics were synthesized by solid-state sintering. Their microstructures and dielectric properties were investigated. Ca(Cu1-xZnx)(3)Ti4O12 single-phase structures were obtained up to x = 0.1, and the Cu+/CU2+ and Ti3+/Ti4+ mixed-valent structure was enhanced with increasing Zn substitution. The giant dielectric response was significantly enhanced by Zn substitution. The dielectric constant increased with increasing x, and a giant dielectric constant plateau as high as similar to 9 x 10(4) was achieved for x = 0.1 at 10 kHz, while that for x = 0 was similar to 3 x 10(4). The enhanced giant dielectric response was profoundly concerned with the modified mixed-valent structure.

引用

页码：184 / 189

页数：6

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