X、U铁氧体的溶胶-凝胶合成及微波性能研究  

Preparation and microwave properties of X,U-type ferrites by citrate sol-gel process

作　　者：张海军[1] 姚熹[2] 张良莹[2] 吴明忠[2] 

机构地区：[1]郑州大学高温材料研究所,河南郑州450052 [2]同济大学功能材料研究所,上海200092

出　　处：《功能材料》2003年第1期39-40,43,共3页Journal of Functional Materials

基　　金：国家自然科学重大基金资助项目(59995320);上海市重点学科建设资助项目

摘　　要：　以柠檬酸铁、碳酸钡、硝酸钴、硝酸锌以及柠檬酸等为原料,采用sol gel工艺合成了Ba2Zn2Fe28O46(Zn2 X)、Ba2Co2Fe28O46(Co2 X)、Ba4Zn2Fe36O60(Zn2 U)、Ba4Co2Fe36O60(Co2 U)铁氧体。采用XRD、SEM对其相成分和显微结构进行研究。并对其复介电常数、复磁导率在100MHz～6.0GHz下的变化规律进行了对比。结果表明,铁氧体试样的磁导率虚部随测试频率的变化曲线上显示出非常明显的由自然共振引起的共振峰。Ba2Zn2Fe28O46(Zn2)X, Ba2Co2Fe28O46(Co2-X), Ba4Zn2Fe36O60(Zn2-U), Ba4Co2Fe36O60(Co2-U) ferrites were prepared by citrate sol-gel process using ferric citrate, BaCO3, Co(NO3)2, Zn(NO3)2 and citrate acid as raw materials; X-ray diffractometry and scanning electron microscopy were used to obtain detailed information on the crystallography of the ferrite powders. The complex dielectric constant and complex permeability dispersion were investigated in 1 MHz-6 GHz ranges. It was showed that very obvious resonance phenomena due to natural resonance were observed in μ'' spectrum for almost all samples.

关 键 词：溶胶-凝胶合成 微波性能 柠檬酸 X型铁氧体 U型铁氧体 

分 类 号：TM277[一般工业技术—材料科学与工程]