采用传统固相法制备了(Ba0.85Ca0.15)(Ti0.9Zr0.1-xSnx)O3 (CBTZS-x)无铅压电陶瓷,研究了不同Sn含量(x=0～0.1)对CBTZS-x陶瓷相结构、介电以及压电性能的影响.实验结果表明:所有样品均为纯钙钛矿结构;随着Sn含量增加,室温下样品逐渐由三方和四方相共存结构转变为四方相结构,且三方-四方相转变温度TR-T和居里温度TC均逐渐减小,当x=0.04时,TR-T更接近于室温,此时表现出优异的压电性能;样品的剩余极化强度Pr和矫顽场Ec巨随着x增加均呈现出减小的趋势,而相对介电常数εr则逐渐增大.当x=0.04时,CBTZS-x材料的综合性能最佳:d33=665pC/N,kp=55.6％,εr=4520,Pr=12.5 μC/cm2,E=1.6 kV/cm,表明该陶瓷材料具有很好的应用前景.
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