摘要
采用固相合成法制备了高温钙钛矿结构0.7Bi(Fe1-xAlx)O3-0.3BaTiO3+0.3%MnO2(BFAx-BT)无铅压电陶瓷。研究了BiAlO3改性对该体系陶瓷显微组织、电性能及温度稳定性的影响。结果表明:随BiAlO3含量的增加,陶瓷晶粒尺寸先增加后减小,压电性能的变化规律与晶粒尺寸变化一致,在x=0.01时,压电性能达到最大值d33=134 pC/N,kp=0.28。陶瓷弥散相变特征随BiAlO3含量的增加更加明显,适量BiAlO3添加显著增加了介电性能与压电性能的温度稳定性,特别是kp随温度增加在退极化温度前基本保持不变。
High-temperature perovskite of BFAx-BT lead-free piezoelectric ceramics were prepared by the conventional solid state reaction method.The effect of BiAlO3 modification on microstructure,electrical properties and temperature stability were investigated.The results indicated that,as the BiAlO3 content increasing,the grain size increased first and then decreased,d33 and kp increased initially then reduced.In particular,x=0.01 BFAx-BT ceramics show optimum piezoelectric properties of d33=134 pC/N,kp=0.28.The characteristics of diffusion phase transition were more evident with x.The temperature stability of dielectric and piezoelectric properties of BFAx-BT ceramics was improved by trace BiAlO3 addition.Especially,the kp kept almost constant when temperature below depoling temperature.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2012年第6期1608-1612,共5页
Journal of Synthetic Crystals
基金
国家自然科学基金(61261012)
广西自然科学基金(2010GXNSFD013007
2010GXNSFB013010)
广西教育厅重点项目(201012MS083)
广西信息材料重点实验室资助项目(桂科能1110908-09-Z)
关键词
无铅压电陶瓷
温度稳定性
居里温度
电性能
lead-free piezoelectric ceramic
temperature stability
Curie temperature
electrical properties
