37BiScO_3-63PbTiO_3铁电陶瓷的极化翻转行为研究  

Ferroelectric polarization reversal behavior in 63PbTiO_3-37BiScO_3 bulk ceramics

作　　者：余罡[1] 董显林[1] 王根水[1] 陈学锋[1] 曹菲[1] 

机构地区：[1]中国科学院上海硅酸盐研究所,中国科学院无机功能材料与器件重点实验室,上海200050

出　　处：《物理学报》2010年第12期8890-8896,共7页Acta Physica Sinica

基　　金：国家高技术研究发展计划(批准号:2007AA03Z106;2006AA03Z431)资助的课题~~

摘　　要：在正弦电场E=E0sin(2πft)加载下,通过改变电场E0(5—55kV/cm)和频率f(0.1—100Hz),测量了37BiScO3-63PbTiO3铁电陶瓷材料的电滞回线.数据拟合结果表明:在低电场和高电场阶段,剩余极化强度Pr的对数和矫顽场强Ec的对数都与电场强度E0的对数存在线性关系,而介于高电场与低电场之间则无线性关系存在,这种三阶段行为有别于现有的两阶段行为.这可归结于铁电陶瓷在不同的电场作用下铁电极化机理的不同.The ferroelectric hysteresis loops of 63PbTiO3-37BiScO3 ceramics are measured under sinusoidal electric field varying from 5 to 55 kV /cm in a frequency range from 0.1 to 100 Hz.The fitting results show that the logarithm of remanent polarization and the logarithm of coercive electric field are both linearly related to electric field in the first and third field regions,but not in the second region.The three-stage behavior is distinct from the existing two-stage behavior,and it can be attributed to the dependence of ferroelectric polarization behavior on field stage.

关 键 词：铁电陶瓷 极化翻转 电滞回线 

分 类 号：TM28[一般工业技术—材料科学与工程]