锌铁氧体的合成及磁电性能  

Synthesis and magnetoelectric properties of zinc ferrite

作　　者：张变芳[1] 刘力虎[2] 

机构地区：[1]石家庄铁道学院数理系,河北石家庄050043 [2]河北师范大学物理科学与信息管理学院,河北石家庄050016

出　　处：《功能材料》2011年第B04期379-381,共3页Journal of Functional Materials

基　　金：国家杰出青年基金资助项目(50625518);河北省教育厅项目(Z2010305;2009155)

摘　　要：用化学共沉淀法制备了系列锌铁氧体微粉。借助于TG-DTA、XRD、SEM、VSM和PNA技术,对干凝胶的热分解过程、产物的物相、微观结构、磁性能和介电常数进行了研究。结果表明,随煅烧温度的提高,锌铁氧体微粉的粒径增大,磁性也增强;尖晶石结构的块状锌铁氧体具有负电阻率温度系数,而且随着煅烧温度的提高,介电常数减小。Zinc ferrite powders were prepared by chemical coprecipitation. The themal decomposition, phase composition, microstructure, magnetic properties and dielectric constant of zinc ferrite were characterized by TG-DTA, XRD, SEM, VSM and PNA techniques. The results showed that, with the calcination temperature increased, particle size of zinc ferrite powders increased and magnetism strengthened. Zinc ferrite massives of spinel structure had a negative temperature coefficient of resistivity, moreover, with the calcination temperature increased, dielectric constant decreased.

关 键 词：化学共沉淀法 锌铁氧体 电阻率 介电常数 

分 类 号：TM22[一般工业技术—材料科学与工程] TM27[电气工程—电工理论与新技术]