Enhanced microwave absorption features of Ba3Co2Fe24O41 hexaferrite by high lanthanium doping concentration |
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| Authors: | Ngo Tran Ruey-Bin Yang Woo Hyun Jeong Do Hung Manh The-Long Phan Bo Wha Lee |
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| Affiliation: | 1. Institute of Research and Development, Duy Tan University, Da Nang, Viet Nam;2. Department of Aerospace and Systems Engineering, Feng Chia University, Taichung, Taiwan;3. Department of Physics and Oxide Research Center, Hankuk University of Foreign Studies, Yongin, Korea;4. Institute of Materials Science, Vietnam Academy of Science and Technology, Ha Noi, Viet Nam |
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| Abstract: | Controlling material structure and its electromagnetic properties, including complex permittivity and permeability, could enhance the microwave absorption performance of the material in terms of reflection loss and effective absorption bandwidth. In this study, La-substituted barium hexaferrite, Ba3?xLaxCo2Fe24O41 (x = 0, 0.1, 0.3, and 0.5) compounds were successfully prepared using the solid-state reaction method, and their corresponding microstructures, static magnetic properties, and electromagnetic features in 2–18 GHz were investigated. The doping of La content increased saturation magnetization, coercivity, and remnant magnetization. The Ba2.7La0.3Co2Fe24O41 epoxied sample with 3.5 mm thickness possessed an excellent microwave absorption of ?47.3 dB at 3.52 GHz, and its corresponding effective absorption bandwidths were 3.75 GHz (2.25–6 GHz) and 0.57 GHz (17.43–18 GHz). It is shown that doping with various La concentrations on Ba3Co2Fe24O41 can be used as an effective technique to tune the performance of microwave absorbers based on barium hexaferrite. |
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| Keywords: | Ba3Co2Fe24O41 electromagnetic properties hexaferrite La doping microwave absorption |
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