(Mo_(1/2)Sr_(1/2))^(4+)掺杂Bi_(1/2)Na_(1/2)TiO_3无铅压电陶瓷结构及其性能研究  

Study on structural and electrical properties of (Mo_(1/2)Sr_(1/2))^(4+) doped Bi_(1/2)Na_(1/2)TiO_3 based lead-free piezoceramics

作　　者：程仁飞 徐志军[1] 初瑞清[1] 郝继功[1] 杜鹃[1] 姬万滨[1] 李国荣[2] 

机构地区：[1]聊城大学材料科学与工程学院,山东聊城252059 [2]中国科学院上海硅酸盐研究所,上海200050

出　　处：《功能材料》2014年第15期15080-15083,15088,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51372110);国家高技术研究发展计划(863计划)资助项目(2013AA030801);山东省自然科学基金资助项目(ZR2012EMM004;ZR2011EMQ015);山东省优秀中青年科学家科研奖励基金资助项目(BS2010CL010)

摘　　要：采用传统陶瓷制备工艺制备出了Bi1/2Na1/2Ti1-x(Mo1/2Sr1/2)xO3(简称BNT-MS-100x)系无铅压电陶瓷材料,研究了(Mo1/2Sr1/2)4+掺杂量对BNT基陶瓷材料显微结构和电学性能的影响。研究结果表明,(Mo1/2Sr1/2)4+掺杂并未影响BNT陶瓷的晶体结构,仍为纯钙钛矿型结构,而且致密性良好。随着(Mo1/2Sr1/2)4+掺杂量增加,居里温度升高,剩余极化强度先增大后减小。当x=0.004时,BNT-MS-100x陶瓷的压电系数最大,d33=104pC/N,介电损耗最小,tanδ=4.11%。Lead-free piezoelectric ceramics,Bi1/2 Na1/2 Ti1 - （Mo 1/2 Sr1/2 ）O 3 （abbreviated as BNT-MS-100 ）, were fabricated by a conventional solid state reaction method.The effect of the doping of （Mo 1/2 Sr1/2 ）4＋ on the microstructure and electric properties of the ceramics were investigated.The results showed that the BNT-based ceramics with （Mo 1/2 Sr1/2 ）4＋ doping did not change the crystal structure and have formed a pure perovskite phase with a dense structure.With （Mo 1/2 Sr1/2 ）4＋ doping increases,the Curie temperature increased,the rem-nant polarization increased first and then decreased,giving its maximum value at =0.004,where the Bi1/2 Na1/2 Ti1 - （Mo 1/2 Sr1/2 ）O 3 ceramics exhibited the highest piezoelectric constant of 3 3 =104 pC/N,together with the lowest dielectric loss tan of 4.1 1%.

关 键 词：无铅压电陶瓷 钛酸铋钠 (Mo1 2Sr1 2)4+掺杂 

分 类 号：TM282[一般工业技术—材料科学与工程]