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.
出处
《中国稀土学报》
CAS
CSCD
北大核心
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
关键词
锰锌铁氧体
微波电磁特性
钐掺杂
稀土
Mn-Zn ferrite
microwave electromagnetic properties
Sm^3＋ substitution
rare earths
