铁电/铁磁复合材料的介电、铁电性能研究  

Research on Dielectric and Ferroelectric Properties of Ferroelectric/ferrite Composites

作　　者：陈江丽[1] 徐卓[1] 王斌科[1] 

机构地区：[1]西安交通大学电子材料与器件研究所,陕西西安710049

出　　处：《压电与声光》2010年第1期112-114,118,共4页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(10474077)

摘　　要：采用传统的固相烧结工艺制备了铁电/铁磁复合材料,组分为(1-x)NiFe_2O_4+xPbZr_(0.52)Ti_(0.48)O_3(其中x=0.5,0.6,0.7,0.8)。利用XRD和背散射电子像分析了复合材料的相成分,结果表明,复合材料由铁电相和铁磁相组成,无杂相生成。通过测量电阻率及压电性能得出复合材料的最佳烧结温度约为1 220℃。介电温谱研究表明,相变温度约为390℃,且不随频率变化,是铁电到顺电的相变。电滞回线呈束腰特征,剩余极化强度较小,随铁电体含量的增加剩余极化强度增大,铁电性加强。A group of ferroelectric and ferrite composites with composition （ 1 - x） NiFe2O4 ＋ xPbZr0. 52 Ti0.48 O3 （where x= 0.5,0.6,0.7,0.8） was prepared by the standard ceramic reaction method. XRD and SEM revealed a ferroelectric phase and ferrite phase without any other phase. The investigation of resistivity and piezoelectric coeffi cient showed the best sintering temperature was 1 220℃. The dependence of dielectric constant with temperature had been studied. The Curie temperature was about 390 ℃ without any change at all studied frequencies. The phase transition of composite was the ferroelectric to the paraelectric phase transition. The hysteresis loop appeared a phenomenon of double hysteresis loop. The remnant polarization of the composites was lower. With the increase content of the ferroelectric phase,the remnant polarization increased, and the ferroelectric properties also enhanced.

关 键 词：铁电/铁磁复合材料 PbZr0.52Ti0.48O3 NIFE2O4 介电 铁电 

分 类 号：TN384[电子电信—物理电子学] TM201.4[一般工业技术—材料科学与工程]