PbTiO_3-CoFe_2O_4磁电复合材料的结构和电性能  

Structure and Electrical Properties of PbTiO_3-CoFe_2O_4 Magnetoelectric Composites

作　　者：许有超[1] 刘敬松[1] 李涛[1] 

机构地区：[1]西南科技大学材料科学与工程学院,四川绵阳621010

出　　处：《中国粉体技术》2011年第1期55-58,共4页China Powder Science and Technology

基　　金：四川省教育厅青年基金项目;编号:09ZB095;西南科技大学博士启动基金(编号:08ZX7111)

摘　　要：采用传统固相烧结法制备不同组分的PbTiO3-CoFe2O4磁电复合材料,采用X射线衍射(XRD)和扫描电子显微镜(SEM)等手段进行分析表征。结果表明:PbTiO3-CoFe2O4复合材料的复合形式为0-3型。1 100℃烧结的PbTiO3-CoFe2O4复合材料具有良好的相结构,同时具有明显的铁电性和铁磁性。PbTiO3-CoFe2O4复合材料的磁性能呈现规律的变化,介电常数却由于元素扩散和铁磁相的约束及稀释作用等原因产生了异常的变化。PbTiO3-CoFe2O4 magnetoelectric composites were prepared by a conventional solid-state reaction method with different volume fraction. X-ray diffraction and scanning electronic microscopy were used to analyzed and characterization the samples. The ferroelectric and magnetic properties of PbTiO3-CoFe2O4 magnetoelectric composites were measured. The results showed that the PbTiO3-CoFe2O4 composites were 0-3 type and exhibited ferroelectric phase and ferromagnetic phage coexisting. The composites sintered at 1 100℃ appeared the best phase structure. The magnetic property changed regularly with the test frequency, but the dielectric permittivity showed the anomalies, which was attributed to constraints and dilutions from the ferromagnetic phase and the element diffusion.

关 键 词：磁电复合材料 介电常数 铁电性 铁磁性 

分 类 号：TM201[一般工业技术—材料科学与工程] TM282[电气工程—电工理论与新技术]