Microstructure-dependent giant dielectric response in CaCu3Ti4O12 ceramics

被引：139

作者：

Ni, L. ^{[1
]}

Chen, X. M. ^{[1
]}

Liu, X. Q. ^{[1
]}

Hou, R. Z. ^{[1
]}

机构：

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

来源：

SOLID STATE COMMUNICATIONS | 2006年 / 139卷 / 02期

基金：

中国国家自然科学基金;

关键词：

CaCu3Ti4O12; perovskite-related compound; dielectric properties; giant dielectric constant; microstructures;

D O I：

10.1016/j.ssc.2006.05.015

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

CaCU3Ti4O12 ceramics were prepared at the sintering temperatures ranged from 1025 to 1125 degrees C, and the dielectric characteristics were evaluated together with the microstructures. The giant dielectric constant with the maximum of 53,120 was obtained in CaCU3Ti4O12 ceramics at room temperature and 10 kHz, and strong processing and microstructure dependence of dielectric characteristics of the present ceramics was determined. The precipitation of the dispersed Cu-rich secondary phases of CuO and/or CU2O and their network structure provided the extrinsic origins of the enhanced giant dielectric response, and the present findings would offer the greater potential for enhancing the giant dielectric constant and controlling the dielectric loss in CaCu3Ti4O12 ceramics by optimizing the microstructures. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：45 / 50

页数：6

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