Er3+-substituted W-type barium ferrite: preparation and electromagnetic properties

• Published in: Journal of rare earths Vol. 28; no. 6; pp. 940 - 943
• Main Authors: HUANG, Xiaogu, ZHANG, Jing, WANG, Hongzhou, YAN, Shaoteng, WANG, Lixi, ZHANG, Qitu
• Format: Journal Article
• Language: English
• Published: College of Materials Science and Engineering,Nanjing University of Technology,Nanjing 210009,China%College of Materials Science and Engineering,Nanjing University of Technology,Nanjing 210009,China 01.12.2010; Jiangsu Provincial Key Laboratory of New Materials of Inorganic and Its Composites,Nanjing University of Technology,Nanjing 210009,China
• Subjects: addition; analysis; analyzer; barium; electromagnetic; electron; ferrite; fluorescence; GHz; improved; loss; microscopy; microwave; network; properties; range; SEM; structure; X-ray; XRD; XRF; W-type barium ferrite; permittivity; rare earth; microwave absorbing properties; permeability
• ISSN: 1002-0721; 2509-4963
• DOI: 10.1016/S1002-0721(09)60211-8

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 mcrphology 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 absoption performance.The maximum of reflection loss(RL)reached about-27.4 dB and RL was below-10dB at the frequency range from 8.4 GHz to 18 GHz,when the thickness was 2.6 mm.