摘要
采用传统固相烧结法合成了Mn掺杂改性BNT基复合体系无铅压电陶瓷,并对其微观结构和电学性能进行了表征和研究。结果表明,Mn掺杂量小于0.6wt%时,样品均保持钙钛矿结构。掺杂量为0.30wt%时,陶瓷样品综合性能最佳,压电常数d 33=174 pC/N,介电常数εr=9800,介电损耗tanδ=0.04,剩余极化强度P r高达36μC/cm^2,矫顽场强度E c降至25 kV/cm,样品具有良好的温度稳定性。并通过扫描电镜中的成份面扫,探讨了Mn掺杂的占位分布和掺杂机制。
Mn-doped BNT-based lead-free piezoelectric ceramics were synthesized by traditional solid-state sintering method,their microstructures and electrical properties were also characterized and studied.The results show that all the experimental samples have pure perovskite structure in the range of Mn doping less than 0.6wt%.The ceramics with 0.30wt%Mn doping exhibite optimum properties the remanent polarization of P r=36μC/cm^2,the piezoelectric constant of d 33=174 pC/N,the dielectric constant ofεr=9800,the dielectric lose of tanδ=0.04,the coercive field E c=25 kV/cm,and with good temperature stability.Component surface by scanning electron microscope(SEM)sweep preliminary of Mn doped accounted for distribution and the doping mechanism was studied.
作者
赵北龙
刘立英
华梦婷
ZHAO Beilong;LIU Liying;HUA Mengting(Department of Materials Engineering,Hebei Polytechnic of Building Materials,Qinhuangdao 066004,China;School of Applied Mathematics,Beijing University of Technology,Beijing 100124,China)
出处
《硅酸盐通报》
CAS
北大核心
2020年第1期254-259,共6页
Bulletin of the Chinese Ceramic Society
关键词
BNT
无铅压电陶瓷
掺杂改性
介电性能
压电性能
BNT
lead-free piezoelectric ceramic
doping modification
dielectric property
piezoelectric property
