Fe_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 Fe_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] 胡耀斌[1] 马家峰[2] 李文华[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：《人工晶体学报》2012年第2期425-429,共5页Journal of Synthetic Crystals

基　　金：国家自然科学基金(51102055);广西自然科学基金重点项目(2010GXNSFD013007);广西信息材料重点实验室主任基金资助项目(桂科能0710908-15-Z)

摘　　要：采用固相合成法制备了Fe2O3掺杂(Ba0.7Ca0.3)TiO3-Ba(Zr0.2Ti0.8)O3(简称BCZT)无铅压电陶瓷。借助XRD、SEM、阻抗分析仪等对该陶瓷的相组成、显微结构以及压电和介电性能进行了研究。结果表明,Fe2O3掺杂降低了BCZT无铅压电陶瓷的烧结温度并使居里温度Tc从85℃提高到95℃;当Fe2O3掺杂为0.02wt%～0.1wt%时,陶瓷样品均为ABO3型钙钛矿结构;少量Fe2O3掺杂促进了陶瓷晶粒的生长,但随着Fe2O3掺杂量进一步增加,陶瓷晶粒随之细化;当Fe2O3掺杂量为0.04wt%时,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、机械品质因数Qm、介电损耗tanδ和介电常数εr分别为400 pC/N,0.40,51,0.023和3482。Fe2O3 doped（Ba0.7Ca0.3）TiO3-Ba（Zr0.2Ti0.8）O3（BCZT） lead-free piezoelectric ceramics were prepared by the solid state synthesis method.The phase composition,microstructure,electrical properties of as-prepared ceramics were characterized by XRD,SEM,impedance analyzer and other techniques.The results show that Fe2O3 doping reduces sintering temperature of BCZT lead-free piezoelectric ceramics and the curie temperature Tc increases from 85 ℃ to 95 ℃.BCZT ceramic samples doped with 0.02wt%-0.1wt% Fe2O3 possess a typical ABO3 type perovskite structure;the grain size of those materials decreases as Fe2O3 content increasing.As doping 0.04wt% Fe2O3,the observed ceramic sample shows the best electrical properties,and its piezoelectric constant d33,electromechanical coupling factor kp,mechanical quality factor Qm,dielectric loss tanδ and dielectric constant εr reach optimum values of 400 pC/N,0.40,51,0.023,3482,respectively.

关 键 词：无铅压电陶瓷 FE2O3 压电性能 低温烧结 

分 类 号：TQ163[化学工程—高温制品工业]