无机材料学报2013，Vol.28Issue(6)：629-634,6.DOI:10.3724/SP.J.1077.2013.12402
BaZrO3掺杂对(K0.49Na0.51)0.98Li0.02(Nb0.77Ta0.18Sb0.05)O3无铅压电陶瓷的结构与电性能的影响
Effect of BaZrO3 Depant on the Structure and Electric Properties of (K0.49Na0.51)0.98Li0.02(Nb0.77Ta0.18Sb0.05)O3 Lead-free Piezoceramics
摘要
Abstract
(K0.45Na0.55)0.98Li0.020Nb0.77Ta0.18Sb0.05)O3-xBaZrO3 (NKNLST-xBZ,x =0-0.020 mol) lead-free piezoelectric ceramics were prepared by solid state reaction method.The effect of BaZrO3 doping amount on the piezoelectric,dielectric,electromechanical and ferroelectric properties were investigated systematically.The results revealed that the crystal structures transformed from orthorhombic phase to tetragonal phase with BaZrO3 doping amount increasing,and the coexistence of orthorhombic-tetragonal phases were observed in the x range from 0.005 to 0.008.Under the condition of two phases co-existence,the ceramic grain became small and uniform and dielectric loss tanδ significantly decreased,while the piezoelectric constant d33 and planar electro-mechanical coupling factor kp increased.The dielectric constant ε33(T)/ε0 of this system ceramics increased continuously with the increase of the BaZrO3 doping amount and the phase transition temperatures shifted to lower temperature.The optimized piezoelectric properties could be obtained at the x =0.005 composition ceramic as follows:the mized piezoelectric properties could be obtained at the x =0.005 composition ceramic as follows:the piezoelectric constant d33 =372 pC/N,planar electromechanical coupling coefficientkp =47.2％,dielectric loss tan δ =3.1％,ahigh dielectric constant ε33(T)/ε0 =1470 and Curie temperature Tc=208 ℃.关键词
铌酸钾钠/锆酸钡/无铅压电陶瓷/钙钛矿Key words
sodium potassium niobate/ barium zirconate/ lead-free piezoelectric ceramics/ perovskite分类
化学化工引用本文复制引用
李月明,肖祖贵,沈宗洋,王竹梅,洪燕,潘铁政,吴芬..BaZrO3掺杂对(K0.49Na0.51)0.98Li0.02(Nb0.77Ta0.18Sb0.05)O3无铅压电陶瓷的结构与电性能的影响[J].无机材料学报,2013,28(6):629-634,6.基金项目
国家自然科学基金(51262011,50962007,51102121) （51262011,50962007,51102121）
江西省自然科学基金(20114BAB206023) （20114BAB206023）
江西省主要学科学术和技术带头人培养计划(2010DD01100) （2010DD01100）
江西省教育厅科技项目(GJJ12508) （GJJ12508）
景德镇市学科带头人项目 （）
National Natural Science Foundation of China (51262011,50962007,51102121) （51262011,50962007,51102121）
Jiangxi Provincial Natural Science Foundation of China (20114BAB206023) （20114BAB206023）
Jiangxi Provincial Major Disciplines of Academic and Technical Leaders Project (2010DD01100) （2010DD01100）
Project of Science and Technology of Jiangxi Provincial Department of Education (GJJ12508) （GJJ12508）
Project of Discip1ines Leaders of Jingdezhen （）
