Abstract
The Mn-Zn ferrite doped with Sm3+, Mn0.3Zn0.7 Fe2-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″ and μ″ 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.
Original language | English |
---|---|
Pages (from-to) | 414-418 |
Number of pages | 5 |
Journal | Zhongguo Xitu Xuebao/Journal of the Chinese Rare Earth Society |
Volume | 27 |
Issue number | 3 |
State | Published - Jun 2009 |
Keywords
- Microwave electromagnetic properties
- Mn-Zn ferrite
- Rare earths
- Sm substitution