CaCu_3Ti_4O_(12)多孔陶瓷的介电性能  

Dielectric Properties of CaCu_3Ti_4O_(12) Porous Ceramics

作　　者：杨小炳[1] 黄旭[1] 郑兴华[1] 汤德平[1] 黄新华[1] 

机构地区：[1]福州大学材料科学与工程学院,福州350108

出　　处：《硅酸盐通报》2013年第3期394-397,共4页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(No.51001027);福建省高等学校新世纪优秀人才支持计划(XSJRC2007-16);福州大学发展基金(2010-XQ-01)

摘　　要：采用固相烧结法在较低温度(<1000℃)制备了CaCu3Ti4O12(CCTO)多孔陶瓷。研究了淀粉对CCTO陶瓷的气孔率、显微结构、介电性能的影响。随淀粉含量的增加,CCTO陶瓷的气孔率从32.4%大幅度上升到淀粉含量为5%和10%时的41.3%和48.6%;阻抗明显增大,介电常数和介电损耗明显降低。通过这些结构和性能的变化,分析讨论了CCTO的巨介电机理。CaCu3Ti4O12（CCTO）porous ceramics were prepared by solid-state reaction method with lower temperature （ 〈 1000℃ ）. Effects of starch on the porosity, microstructure and dielectric properties of CCTO ceramics have been investigated. With the content of starch increases, porosity increases from 32. 4% for CCTO ceramics to 41.3%, 48.6% for the samples with 5% ,10% starch, repectively. And the resistance increases, the dielectric constant and dielectric loss significantly reduces. The giant dielectric mechanism of CCTO has been also discussed and analyzed through the change of the structure and the performance.

关 键 词：CaCu3Ti4O12(CCTO)陶瓷 多孔陶瓷 介电性能 

分 类 号：TQ174[化学工程—陶瓷工业]