采用两步钶铁矿前驱体工艺制备了PbSnO3-Pb(Mg1/3Nb2/3)O3-PbTiO3(PSn-PMN-PT)三元系压电陶瓷,研究了Sn含量的变化对PSn-PMN-PT三元系压电陶瓷结构和性能的影响.XRD结果表明,所选成分均处于三方相和四方相共存的准同型相界上,当Sn含量减少时,PSn-PMN-PT的XRD图谱基本没有发生变化,而当Sn含量增加时,在XRD图谱中逐渐出现烧绿石相.电性能研究表明,缺失少量Sn可以提高PSn-PMN-PT的压电、介电和铁电性能,减小损耗;而添加过量Sn明显损害其压电和铁电性能,增加损耗.缺失0.2mol％Sn的PSn-PMN-PT具有最佳的压电和铁电性能,d33:～530 pC/N,kp:～56.4％,Qm:～570,εr:～3070,tanδ:～0.32％,Pr:～28.9 μC/cm2,EC:～8 kV/cm.
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