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

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/e 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/ec will reach its maximum.When G/t=0.9,pc/ec 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.