固相反应烧结法制备CCTO陶瓷  

CaCu_3Ti_4O_(12) ceramics prepared by solid state reaction sinter

作　　者：仲崇成[1] 严顺智[1] 郑兴华[1] 汤德平[1] 

机构地区：[1]福州大学材料科学与工程学院,福建福州350002

出　　处：《电子元件与材料》2007年第11期20-21,25,共3页Electronic Components And Materials

基　　金：福建省先进陶瓷技术重大专项资助项目(2005HZ02-3);福州大学人才基金资助项目(XJY-0413);福建省青年科技人才创新基金资助项目(2005J012)

摘　　要：采用固相反应烧结法制备了CaCu3Ti4O12(CCTO)陶瓷,研究了其烧结性能、结构和介电性能。在1120℃烧结即可获得单相CCTO致密陶瓷,其收缩率高达22.3%。εr随着烧结温度升高而明显增大,且具有明显的频率敏感性,利用复阻抗谱分析了CCTO陶瓷的介电特性。于1120℃,烧结3h制备的CCTO陶瓷的εr为3005(室温,1kHz)。CaCu3Ti4O12 （CCTO） ceramics were prepared by solid-state reaction sinter. The sintering behavior, crystal structure and dielectric properties of CCTO ceramics were investigated together with frequency and temperature dependence of dielectric properties. The single phase dense ceramics CCTO was sintered at 1 120 ℃ for 3 h, which the shrinkage reached 22.3%. Dielectric constant obviously increase with increase of sintering temperature and is strongly sensitive to frequency. These dielectric behaviors are analyzed by impedance spectra. The CCTO ceramics are obtained with dielectric constant of 3 005 （at room temperature and 1 kHz）.

关 键 词：无机非金属材料 钙钛矿 介电性能 固相反应烧结 CACU3TI4O12 

分 类 号：TB34[一般工业技术—材料科学与工程]