摘要
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。
PbSnO3-Pb（Mg1/3Nb2/3）O3-PbTiO3 （PSn-PMN-PT） ternary ceramics were successfully prepared by two-step columbite precursor method. The effects of Sn content on the phase structure and electrical properties of PSn-PMN-PT were investigated. X-ray powder diffraction （XRD） results indicated that all studied PSn-PMN-PT compositions located around the morphotropic phase boundary （MPB）, with rhombohedral and tetragonal phases coexisted. With the decrease of Sn content, no change was observed in the XRD patterns of PSn-PMN-PT, while pyrochlore phase presented with excess Sn. The piezoelectric, dielectric and ferroelectric properties of PSn-PMN-PT were found to be improved with deficient Sn and deteriorate with increasing Sn content. In particular, the optimum piezoelectric and ferroelectric properties were achieved for PSn-PMN-PT ceramics with 0.2mol% deficient Sn, i.e. d33=~530 pC/N, kp=~56.4%, Qm=~570, εr=~3070, tanδ=~0.3%, Pr=~28.9 μC/cm2 and EC=~8 kV/cm.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2014年第1期28-32,共5页
Journal of Inorganic Materials
基金
国家自然科学基金(50742007,50972014,51132002)
863项目(2007AA03Z103)
声纳与水声技术国防科技重点实验室基金(914C24KF0901)~~
