Sm_2O_3掺杂(Ba_(0.7)Ca_(0.3))TiO_3-Ba(Zr_(0.2)Ti_(0.8))O_3无铅压电陶瓷的制备与性能  

Preparation and Properties of Sm_2O_3 Doped (Ba_(0.7)Ca_(0.3))TiO_3-Ba(Zr_(0.2)Ti_(0.8))O_3 Lead-free Piezoelectric Ceramics

作　　者：崔业让[1] 刘心宇[1,2] 袁昌来[1,2] 翟霞[1] 胡耀斌[1] 李若雯[1] 

机构地区：[1]桂林电子科技大学广西信息材料重点实验室,桂林541004 [2]中南大学材料科学与工程学院,长沙410083

出　　处：《无机材料学报》2012年第7期731-734,共4页Journal of Inorganic Materials

基　　金：广西省自然科学基金(2010GXNSFD013007);广西信息材料重点实验室主任基金(桂科能0710908-15-Z)~~

摘　　要：采用固相合成法制备了Sm2O3掺杂的(Ba0.7Ca0.3)TiO3-Ba(Zr0.2Ti0.8)O3(BCZT)无铅压电陶瓷.借助XRD、SEM等手段对该陶瓷的显微结构与电性能进行了研究.结果表明,Sm2O3的掺杂降低了BCZT无铅压电陶瓷的烧结温度并使居里温度点Tc从85℃提高到95℃.当Sm2O3掺杂量为0.02wt%～0.1wt%时,样品具有典型ABO3型钙钛矿结构.Sm2O3掺杂量为0.02wt%时,所得陶瓷样品具有最优综合电性能,其压电常数d33、机电耦合系数kp、机械品质因子Qm、介电损耗tanδ和介电常数εr分别为590 pC/N、0.52、43、1.3%和3372.Sm2O3 doped（Ba0.7Ca0.3）TiO3-Ba（Zr0.2Ti0.8）O3（BCZT） lead-free piezoelectric ceramics were prepared by solid state synthesis method.The microstructure and electrical properties of prepared ceramics were investigated by XRD,SEM and other techniques.The results demonstrate that Sm2O3 doping reduces sintering temperature of BCZT lead-free piezoelectric ceramics and increases the Curie temperature Tc from 85℃ to 95℃.BCZT ceramics doped with 0.02wt%–0.1wt% Sm2O3 possess a typical ABO3type perovskite structure.With the doping of 0.02wt% Sm2O3,the BCZT ceramics show the optimum electrical properties,and its piezoelectric constant d33,electromechanical coupling factor kp,mechanical quality factor Qm,dielecteic loss tanδ and relative dielectric constant εr reach 590 pC/N,0.52,43,1.3% and 3372,respectively.

关 键 词：无铅压电陶瓷 SM2O3 压电性能 钙钛矿 

分 类 号：TQ174[化学工程—陶瓷工业]