Influence of Er3+ Substitution on Microwave Magnetic Performance of BaFe12O19
Barium hexaferrites doped with Er<3+>, Ba<,1-x>Er <,x>Fe<,12>O<,19>, x=0.0, 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). All the XRD patterns showed the single phase of the magnetoplumbite barium ferrite without other intermediate phase when x is below 0.02. The lattice parameters of ferrites doped with Er<3+> decreased, indicating that the substitution of Er<3+> occurs on Ba<2+> basis site and results in a contract of the crystal cell. The microwave electromagnetic properties of the samples have been studied at the frequency range from 2 to 18 GHz. It was shown that ε increased slightly, and the maximum of ε appeared at low frequency position with Er<3+> doping. μ and μ were improved significantly when x=0.01, and the maxima are 2 and 1.7, respectively. The reasons were also discussed using electromagnetic theory.
barium hexaferrites microwave electromagnetic properties Er<3+> substitution rare earths
Wang Lixi(王丽熙) Huang Qiang(黄强) Zhang Qitu(张其土) Song Jie(宋杰)
College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China
国际会议
第五届国际稀土开发与应用研讨会(The Fifth International Conference on Rare Earth Decelopment and Applicatin)
包头
英文
214-217
2007-08-07（万方平台首次上网日期，不代表论文的发表时间）