中国粉体技术2012，Vol.18Issue(5)：32-36,5.DOI:10.3969/j.issn.1008-5548.2012.05.008
溶胶-凝胶法制备CaCu3Ti4O12粉体及其电性能
Preparation of CaCu3Ti4O12 Powders by Sol-Gel Process and Electric Properties
摘要
Abstract
CaCuTi4O12 powders were prepared by sol-gel method and characterized by TG-DTA, XRD and SEM. The sintering characteristics and electric properties of CaCu3Ti4O12 powders were investigated. The results show that CaCu3Ti4O12 powders with a diameter of 80~100 nm and narrow particle size distribution can be obtained by low temperature calcining the xerogel at 750 ℃. CaCu3Ti4O12 ceramics made from the powder can be sintered at 1 000 ℃ to acquire the dense structure. The sintering temperature is lower by 100~200 ℃ than the sample obtained by solid reaction method using micron powders. The sintering range of CaCu3Ti4O12 ceramics is also widened. At the sintering temperature of 1 050 ℃ for 2 h, CaCu3Ti4O12 ceramics made from powder have good electric properties. The relative dielectric constant value is 20 190, loss tangent is 0.022, and nonlinear coefficient is 4.530.关键词
溶胶-凝胶法/电性能/物相结构/微观结构Key words
sol-gel process/ electric properties/ phase structure/ micro-structure分类
化学化工引用本文复制引用
王茂华,王秋丽,张笑林..溶胶-凝胶法制备CaCu3Ti4O12粉体及其电性能[J].中国粉体技术,2012,18(5):32-36,5.基金项目
江苏省自然科学基金项目,编号:BK2009539 （）
常州市科技创新项目,编号:CC20110048 （）
常州市科技计划项目,编号:CN2010051. （）
