Er3+-substituted W-type barium ferrite: preparation and electromagnetic properties
来源期刊：Journal of Rare Earths2010年第6期
论文作者：黄啸谷 张静 王洪洲 闫绍腾 王丽熙 张其土
文章页码：940 - 943
摘 要：Er3+-substituted W-type barium ferrites Ba1-xErx（Zn0.3Co0.7）2Fe16O27 （x=0.00, 0.05, 0.10, 0.15, 0.20） were synthesized by polymer adsorbent combustion method. Samples were characterized by X-ray diffraction analysis （XRD）, X-ray fluorescence （XRF）, scanning electron microscopy （SEM） and network analyzer to investigate the relationships among Er3+ concentration, crystal structure, surface morphology and electromagnetic properties. All the XRD patterns showed pure phase of W-type barium ferrite when x≤0.15, while the impurity phase of ErFeO3 appeared when x=0.20. The pure W-type barium ferrite showed a hexagonal flake shape. In addition, the microwave electromagnetic properties of samples were analyzed in the frequency range of 2-18 GHz. It was indicated that the electromagnetic properties were significantly improved when Er3+ doping content was 0.10. The reasons were also discussed using electromagnetic theory. The optimized ferrite exhibited excellent microwave absorption performance. The maximum of reflection loss （RL） reached about-27.4 dB and RL was below-10 dB at the frequency range from 8.4 GHz to 18 GHz, when the thickness was 2.6 mm.
黄啸谷1，张静1，王洪洲1，闫绍腾1，王丽熙1，张其土1,2
1. College of Materials Science and Engineering, Nanjing University of Technology2. Jiangsu Provincial Key Laboratory of New Materials of Inorganic and Its Composites, Nanjing University of Technology
摘 要：Er3+-substituted W-type barium ferrites Ba1-xErx（Zn0.3Co0.7）2Fe16O27 （x=0.00, 0.05, 0.10, 0.15, 0.20） were synthesized by polymer adsorbent combustion method. Samples were characterized by X-ray diffraction analysis （XRD）, X-ray fluorescence （XRF）, scanning electron microscopy （SEM） and network analyzer to investigate the relationships among Er3+ concentration, crystal structure, surface morphology and electromagnetic properties. All the XRD patterns showed pure phase of W-type barium ferrite when x≤0.15, while the impurity phase of ErFeO3 appeared when x=0.20. The pure W-type barium ferrite showed a hexagonal flake shape. In addition, the microwave electromagnetic properties of samples were analyzed in the frequency range of 2-18 GHz. It was indicated that the electromagnetic properties were significantly improved when Er3+ doping content was 0.10. The reasons were also discussed using electromagnetic theory. The optimized ferrite exhibited excellent microwave absorption performance. The maximum of reflection loss （RL） reached about-27.4 dB and RL was below-10 dB at the frequency range from 8.4 GHz to 18 GHz, when the thickness was 2.6 mm.
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