摘要
采用固相反应法制备了0.99Bi0.47Na0.47Ba0.06TiO3-0.01KNbO3+x mol%CuO(x=0,0.25,0.5,1,2)(BNBT-1%KN+x mol%CuO)无铅压电陶瓷。使用XRD、Agilent4294A精密阻抗分析仪等对该体系的结构、电学性能进行表征。结果显示所制备的压电陶瓷具有纯的钙钛矿结构;CuO掺杂能够对材料的电学性能有很大影响,少量掺杂能使铁电材料"硬化"。在x=0.5时,陶瓷样品的电性能达到:d33=170 pC/N,kp=24%,Qm=157,tanδ=2.1%,ε33=874;此外还发现少量的CuO还能提高BNBT-1%KN的退极化温度,在x=0.5时陶瓷具有最高的温度稳定性,退极化温度Td达到99℃。
The 0.99Bi0.47Na0.47Ba0.06TiO3-0.01KNbO3+x mol% CuO(x=0,0.25,0.5,1,2)(BNBT-1%KN+x mol% CuO) lead-free piezoelectric ceramics were fabricated by solid state reaction.The structure and electrical properties of the samples were analyzed by XED and impendance analyzer(Agilent 4294A).The XRD result shows that all samples possess pure perovskite structure.CuO-doping have great influences on the electrical properties of the ceramics greatly.BNBT-1%KN ceramics become "hard".When x=0.5,the ceramics exhibit electrical properties: d33=170 pC/N;kp=24%;Qm=157;tanδ=2.1%;ε33=874.Addition of proper amount of CuO can enhance the depolarization temperatures of BNBT-1%KN.The ceramic has the highest temperature stability at x=0.5,and the depolarization temperature Td achieves 99 ℃.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2011年第4期942-946,968,共6页
Journal of Synthetic Crystals
基金
国家自然科学基金(51002082)资助项目
宁波大学王宽诚幸福基金资助项目
关键词
无铅压电陶瓷
介电
掺杂
lead-free piezoelectric ceramics
dielectric
doping
作者简介
倪峰(1986-),男,浙江省人,硕士研究生。E-mail:nifeng0572@163.com
通讯作者:罗来慧,副教授。E-mail:llhsic@126.com