Fe2O3掺杂(Ba0.7Ca0.3)TiO3-Ba(Zr0.2Ti0.8)O3无铅压电陶瓷的制备与性能

人工晶体学报, 2012, 41(2): 425-429.

Fe2O3掺杂(Ba0.7Ca0.3)TiO3-Ba(Zr0.2Ti0.8)O3无铅压电陶瓷的制备与性能

崔业让 ^1, , 刘心宇 ^2, , 袁昌来 ^3, , 胡耀斌 ^4, , 马家峰 ^5, , 李文华 ^6,

1.桂林电子科技大学广西信息材料重点实验室,桂林541004

2.桂林电子科技大学广西信息材料重点实验室,桂林541004;中南大学材料科学与工程学院,长沙410083

3.桂林电子科技大学广西信息材料重点实验室,桂林541004;中南大学材料科学与工程学院,长沙410083

4.桂林电子科技大学广西信息材料重点实验室,桂林541004

5.中南大学材料科学与工程学院,长沙410083

6.桂林电子科技大学广西信息材料重点实验室,桂林541004

基金项目: 广西自然科学基金重点项目(2010GXNSFD013007) 国家自然科学基金(51102055) 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)

关键词：无铅压电陶瓷 , Fe2O3 , 压电性能 , 低温烧结

Preparation and Properties of Fe2O3 Doped ( Ba0.7Ca0.3 ) TiO3-Ba ( Zr0.2 Ti0.8 ) O3 Lead-free Piezoelectric Ceramics

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.lwt％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.

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