标题：Phase Transition and High Piezoactivity of Sb Doped （Na0.53K0.435Li0.035）Nb0.94Ta0.06 O3 Lead-Free Ceramics
作者机构：[亓鹏;王矜奉;明保全;王春明]School of Physics, Shandong University, Ji\'nan 250100.;[梁兴华]Foxconn Technology Group, Yantai 264006
通讯作者地址：[Qi, P]Shandong Univ, Sch Phys, Jinan 250100, Peoples R China.
摘要：Lead-free piezoelectric ceramics with the composition of (Na0.53K0.435Li0.035) Nb-0.94-xSbxTa0.06O3 (NKLNST) are synthesized by a conventional solid-state sintering process. An MPB-like region between orthorhombic and pseudocubic phases is found in this system. The density, piezoelectric and dielectric properties are enhanced greatly in this region. A composition (Na0.53K0.435Li0.035) (Nb0.86Sb0.08Ta0.06) O-3 is found to have excellent electrical properties: d(33) = 320 pC/ N, k(p) = 49% and k(t) = 43%, as well as relatively low loss, tan delta = 4.2%, and high relative density higher than 96%, which indicate that this ceramics is a promising lead-free piezoceramics replacing for lead zirconate titanate.