摘要
采用溶胶-凝胶方法制备了(Ba0.90Ca0.10)TiO3陶瓷,在电场1.5～20kV/cm下,在频率为0.01～10Hz范围内,对其电滞回线进行了分析。实验结果表明(Ba0.90Ca0.10)TiO3陶瓷的电滞回线随电场值和频率的变化明显,在低电场下,随着频率的增加矫顽场(Ec)单调减小,在低频下剩余极化(Pr)增加;而在高电场下,随着频率的增加Ec单调增大,电滞回线达到饱和时,电滞回线随不同测试频率无明显变化。
Barium calcium titanate（Ba0.90Ca0.10）TiO3 ceramics were prepared by sol-gel technique.The evolution of the ferroelectric hysteresis loops was analyzed at frequencies ranging from 0.01 to 10 Hz and in a field of 1.5-20kV/cm.The results show that the electric field and frequency dependence of hysteresis loops are obvious.At low field,coercive field（Ec） decreases monotonically with frequency increasing,and remanent polarization increases at low frequency.But at high field,Ec increases monotonically with frequency increasing,and the evolution of the hysteresis loops is not obvious with different testing frequency when the hysteresis loops become saturated.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2011年第12期2245-2248,共4页
Journal of Functional Materials
基金
国家自然科学基金资助项目(50872093,50872094)
国家高技术研究发展计划(863计划)资助项目(2007AA03Z524)
天津师范大学服务天津市和滨海新区专项基金资助项目(52LE21)
关键词
溶胶-凝胶
陶瓷
电滞回线
铁电性
电场
sol-gel
ceramics
hysteresis loops
ferroelectricity
electric field
