マンガンを添加した正方晶PZTセラミックスの作製とその焦電的性質

概要

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High density tetragonal PZT ceramics with compositions of {Pb(Zr_xTi_<1-x>)O_3+0.5mass%MnO_2}, where x=0.10-0.50, were synthesized by hot isostatic pressing (HIP). Pressed samples with x=0.20 had the highest bulk density of 7.82 g/cm^3, which is 98.2% of the theoretical density. The pyroelectric properties of poled PZT ceramics with x=0.10-0.50 were evaluated. The Curie temperature T_C decreased linearly with increasing Zr content. The rate of linear decrease m calculated from the slope of the linear plot of T_C with x was approximately 3.0℃/mol% Zr. The PZT sample with x=0.20 exhibited the highest figure of merit F.M. of around 2.1×10^<-11> C・cm/J. Assuming that the volume specific heat C_V of the present sample with x=0.20 and that of {Pb(Zr_xTi_<1-x>)O_3+2mass%ZnBi_<2/3>Mn_<1/3>O_3}(PZT-ZBM) ceramic with x=0.30 that has already been reported are the same (3.1J/cm^3・K), the F.M. for voltage responsivity of pyroelectric IR sensors fabricated using these ceramics which have the same tetragonal structure should be nearly equal.
社団法人日本セラミックス協会の論文
1996-04-01