0-3/1-3混合连通型铁电陶瓷-铁电聚合物的热释电性  

Research on pyroelectric properties of ferroelectric ceramic ferroelectric polymer 0-3/1-3 composites

作　　者：姜胜林[1] 仝金雨[1] 刘栋[1] 金学淼[1] 邓传益[1] 任伏龙[1] 

机构地区：[1]华中科技大学电子科学与技术系,武汉430074

出　　处：《复合材料学报》2007年第4期140-144,共5页Acta Materiae Compositae Sinica

基　　金：国家重点基础研究发展973计划(2004CB619300);新世纪优秀人才支持计划(NCET-04-0703)

摘　　要：推导出了0-3/1-3混合连通型铁电陶瓷-铁电聚合物的热释电系数表达式,并详细讨论了陶瓷体积分数v2和陶瓷颗粒粒径与膜厚比(G/t)分别对复合材料的热释电系数pc及pc/cε(cε为复合材料的介电常数)的影响。结果表明:当G/t≥0.5时,不同陶瓷体积分数复合材料的热释电系数pc均趋向于某个定值,说明此时G/t对热释电系数的影响可忽略不计;另外当陶瓷体积分数为0.1时,随着G/t的增大,pc/cε出现一个极大值,且当G/t=0.9时,pc/cε比纯PZT陶瓷的大8倍,表明此条件为最佳工艺条件。而且,在低陶瓷体积分数和低G/t比时,理论曲线与实验数据符合较好。An expression was derived for the pyroelectric coefficient of ferroelectric ceramic-ferroelectric polymer 0-3/1-3 composites; the influence of ceramic volume fraction v2 and the ratio of ceramic grain size to film thickness （G/t） on the pyroelectric coefficient（pc） and Pc/ε c of ferroelectric composites is discussed. The results show that when G/t≥0. 5, at different ceramic volume fractions v2, the pyroelectric coefficient tends to become constant. This means that the influence of G/t on the pyroelectric coefficient is neglectable. When ceramic volume fraction v2 =0.1 and G/t increases, pc/εc will reach its maximum. When G/t=0. 9, pc/εc of ferroelectric composites is 8 times larger than that of pure PZT ceramics, v250.1 and G/t=0. 9 were the best technological condition. Additionally, theoretical curves and experimental data fit each other at low ceramic volume fractions and low G/t.

关 键 词：热释电效应 铁电陶瓷 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]