Microwave Absorbing Properties of Magnesium-substituted MnZn Ferrites Prepared by Citrate-EDTA Complexing Method

材料科学技术（英文）, 2010, 26(9): 787-792.

^1, , ^2, , ^3, , ^4,

1.College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China

2.College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China

3.College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China

4.College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China;Jiangsu Provincial Key Laboratory of New Materials of Inorganic and Its Composites, Nanjing University of Technology, Nanjing 210009, China

基金项目: This work was supported by the National Defence Fundamental Research of China(under grant No. MKPT-232)

Microwave Absorbing Properties of Magnesium-substituted MnZn Ferrites Prepared by Citrate-EDTA Complexing Method

Jie Song ^1, , Lixi Wang ^2, , Naicen Xu ^3, , Qitu Zhang ^4,

1.College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China

2.College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China

3.College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China

Keywords： Mn-Zn ferrite

Magnesium-substituted MnZn ferrites with composition of Mn0.4Zn0.6MgxFe(2-x)O4 (x=0.00, 0.05) were prepared by citrate-EDTA (ethylenediamine tetraacetic acid) complexing method. The crystal structure, sur-face morphology and electromagnetic properties of the calcined samples were characterized by X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM) and network analyzer (Agilent 8722ET). All the XRD patterns showed the single phase of the spinel-type MnZn ferrite without other intermediate phase. The lattice parameter and average particle size increased with the substitution of magnesium. The microwave electromagnetic properties of the samples have been studied at the frequency range from 2 to 18 GHz. It was shown that the values of ε' and ε" decreased slightly with the substitution of magnesium. The values of μ' and μ" were improved significantly, and the peak of μ" shifted to low frequency with Mg2+ ions substituting. Furthermore, the reasons have also been discussed by using electromagnetic theory. The reflection loss (RL) ascended after magnesium was substituted. Magnesium-substituted ferrite had excellent microwave absorption properties. The frequency (with respect to -10 dB) started from 11.3 GHz, and the bandwidth reached about 3.5 GHz. The peak value of RL was about -19 dB at a matching thickness of 3.1 mm.

参考文献

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Microwave Absorbing Properties of Magnesium-substituted MnZn Ferrites Prepared by Citrate-EDTA Complexing Method

参考文献