【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。更多还原

【Abstract】 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.v2=0.1 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.更多还原