采用传统的陶瓷工艺制备了Sr掺杂Bi0.5(Na0.8K0.2)0.5TiO3无铅压电陶瓷(化学式为[Bi0.5(Na0.8K0.2)0.5]1-xSrxTiO3,x=0～0.1),研究了Sr掺杂对陶瓷样品的微观结构、压电以及介电性能的影响.X射线衍射结果表明:当掺杂量较小时(x=0,0.02),样品为四方相;随着掺杂量的增加(x=0.04～0.1),样品逐渐转变为三方相.压电与介电性能测试结果表明:样品的压电常数d33和机电耦合系数kp开始时都随着x的增加而逐渐增大,并分别在x=0.06和x=0.04时达到最大值,其后随着x的增加都逐渐减小;样品的介电常数εT33/ε0则随x的增加而几乎线性增加.在x=0.06时,样品的d33=178 pC/N,kp=31%,εT33/ε0=850.
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