中文摘要：

采用传统工艺制备了无铅压电陶瓷（Na0.5K0.45Li0.05）SbxNb1-xO3，研究了Sb掺杂对其压电、铁电、介电等性质的影响．实验结果表明，样品的居里点（Tc）、正交一四方相变温度（TT-O）均随Sb含量的增加而降低，掺杂7mol％Sb时，样品的居里点从454℃降至345℃，no从100℃降至室温以下．Sb5＋的引入限制了晶粒的生长，但提高了样品的致密度，从而提高了样品的压电、铁电性能．组分为（Na0.5K0.45Li0.05）Sb0.05Nb0.95O3的样品具有较为优异的性能：d33=241pC／N，Qm=50，kp=38．3％，d31=-83pC／N，g31=-0．08Vm／N，Pr=17μC／cm2，同时，该组分样品表现最“软”，具有相对最高的弹性柔顺常数SE11=14．2．

英文摘要：

（Na0.5 K0.45 Li0.05） SbxNb1-xO3 ceramics were prepared by conventional oxide solid-solution technique and the effect of Sb on the piezoelectric, ferroelectric and dielectric properties were investigated. The results show that Both Curie temperature （To） and orthorhombic-tetragonal phase transition temperature （TT-o） decreased with increasing Sb content. For the composition with 7mol% Sb, TC and TT-o decreased from 454 oC and 100℃ to 345 oC and below room temperature,respectively. The addition of Sb inhibited the grain growth whereas,improved the ceramic density and piezoelectric, ferroelectric properties. The relative ＂soft＂ sample of （Na0. 5 K0. 45 Li0. 05 ） Sb0.05 Nb0.95O3 shows high performance of d33 =241 pC/N,Qm=50,kp =38.3% ,d31 =-83 pC/N,g31 =-0.08Vm/N,Pr=17μC/cm2 and SE11 =14.2.