钐掺杂对锰锌铁氧体微波电磁性能的影响  

Influence of Samarium Substitution on Microwave Magnetic Performance of Mn-Zn Ferrite

作　　者：宋杰[1] 许乃岑[1] 王丽熙[1] 张其土[1,2] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009 [2]南京工业大学江苏省无机及其复合新材料重点实验室,江苏南京210009

出　　处：《中国稀土学报》2009年第3期414-418,共5页Journal of the Chinese Society of Rare Earths

基　　金：民口配套项目(MKPT-232)资助

摘　　要：采用固相法合成了钐掺杂的锰锌铁氧体Mn0.3Zn0.7Fe2-xSmxO4(x=0,0.01,0.02,0.04,0.06),通过XRD对合成粉末进行了晶体结构的分析,结果表明:当x≤0.02时,制得的粉体为相对较纯的尖晶石型铁氧体。稀土掺杂锰锌铁氧体的晶格常数随着掺钐量的增加先增大后减少。使用Agilent8722ET网络分析仪在2～18GHz的频率范围内对其微波电磁特性进行测试,结果显示,当掺钐量为0.02时,在9～18GHz的频率范围内电磁参数ε′和ε″稍有增加,ε″最大值出现的位置移向低频。μ″和μ′峰值均大大增加,最大值分别达到6.2和5.5,该掺钐量下微波电磁性能最佳。利用微波电磁理论分析了电磁参数的变化机制。The Mn-Zn ferrite doped with Sm^3＋ ,Mn0.3Zn0.7Fe2-xSmxO4 （x =0, 0.01, 0.02, 0.04,0.06） , were prepared by the conventional ceramic technology. The structure and electromagnetic properties of the calcined samples were studied using powder X-ray diffraction （ XRD ） and network analyzer （ Agilent 8722ET）. When x was below 0.02, the XRD patterns showed the relatively pure phase of the spinel ferrite. The lattice parameters of ferrites first increased and then decreased with substitution amount. The micro-wave electromagnetic properties of the samples were studied at the frequency range from 2 to 18 GHz. It was shown that ε＇ and ε＂ increased slightly at the frequency range from 9 GHz to 18 GHz, and the maximum of ε＂ appeared at low frequency position when x = 0.02. The maxima of μ＂ andμ＇ were improved significantly, and the maxima were 6.2 and 5.5, respectively. It was indicated that the microwave electromagnetic properties were excellent when x =0.02. All the reasons were also discussed using electromagnetic theory.

关 键 词：锰锌铁氧体 微波电磁特性 钐掺杂 稀土 

分 类 号：TQ174.75[化学工程—陶瓷工业]