中文摘要：

在A位和B位同时分别加入Ca2＋、Zr4＋和Sn4＋,采用传统的固相烧结法在1480℃烧结4 h制备了（Ba1–xCax）（Ti0.94Zr0.056Sn0.004）O3（BCxTZS）压电陶瓷。研究了Ca2＋含量x对BCxTZS陶瓷微观形貌、相结构和电学性能的影响。结果表明：少量Ca2＋有利于晶粒长大,x=0.05的样品具有最大的晶粒尺寸12.88μm,Ca2＋、Zr4＋和Sn4＋全部固溶到Ba TiO3晶格中形成单一固溶体。当0.00≤x≤0.03时,BCxTZS陶瓷的室温相结构为正交相（O）–四方相（T）两相共存;x=0.05时,O–菱方相（R）–T三相共存;x=0.07时,O相消失,R–T两相共存。所有样品具有较高的Curie温度（TC〉104℃）和良好的电学性能（d33=325 p C/N、kp=34%、Qm=151）,实现了电学性能和Curie温度的协同调控。

英文摘要：

Abstract： In this paper, Ca^2＋, Zr^4＋ and Sn^4＋ were simultaneously doped at A-sites and B-sites, respectively.（Ba（1-x）Cax）（Ti（0.94）Zr（0.056）Sn（0.004））O3 （BCxTZS） lead-free piezoelectric ceramics were fabricated by conventional solid-state sintering at 1 480℃ for 4 h. The effect of Ca^2＋ content （x） on the microstructure, phase structure and electrical properties were investigated. The results show that a small amount of Ca^2＋ is conducive to the grain growth, in which a greater grain size of 12.88μm is attained as x=0.05. Ca^2＋, Sn^4＋ and Zr4＋ ions completely diffuse into the BaTiO3 lattice to form a single solid solution. The phase structure is orthorhombic （O） -tetragonal （7） coexisted structure as 0.00≤x≤0.03, O-rhombohedral（R） -T multiphase coexisted structure as x-=0.05, and R-T coexisted structure as x=0.07, respectively. All the samples possess a high Curie temperature （i.e., Tc〉104℃）, along with the better piezoelectric properties （i.e., d33=325 pC/N, kp=34%, Qm=l 51） as x=0.05, improving the electrical properties and the Curie temperature.