Preparation and Microwave Absorption Performance of Cerium Ion Doped Nickel-based Ferrite
Abstract:The cerium ion doped nickel-based ferrite (NiCexFe2-xO4, x = 0.02, 0.04, 0.06, 0.08, 0.10) powers were prepared by a sol–gel method. The structure and electromagnetic properties of the powders were characterized by X-ray diffractometer, scanning electron microscope, vibrating sample magnetometer and vector network analyzer, respectively. The results show that the powder is a pure spinel ferrite when the doping amount of cerium x≤0.06. All the powders with different Ce3+ doping amounts exhibit superparamagnetic, and the powder with the Ce3+ doping amount of 0.06 has a maximum saturation magnetization of 59.47 A•m2/kg at room temperature. The real part of the complex permittivity ε′ is maximum at the doping amount of 0.08, and becomes minimum at the doping amount of 0.04. The maximum imaginary part ε″ is obtained at the doping amount of 0.06 and the minimum ε″ is achieved at the doping amount of 0.10. The variation of the cerium doping amount has little effect on the real part of the complex permeability μ′ of samples. However, the imaginary part of complex permeability μ″ firstly increases and then decreases with increasing the cerium doping amount in the range of 2–6 GHz. The analysis on the impedance matching and absorbing properties of the unintentional doped samples and the doped samples indicates that the matching thickness of the doped sample is reduced by 1.52 mm, its minimum reflectance is decreased by 11.16 dB, and the width of the band with the reflectance less than –10 dB is increased by 1.80 GHz. The electromagnetic wave absorption properties of the nickel ferrite can be improved when x = 0.06.
Document Type: Research Article
Affiliations: No. 603 Faculty, Xi′an Research Institute of High Technology, Xi′an 710025, China
Publication date: 2013-06-01
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- Journal of the Chinese Ceramic Society (JCCS), published in Chinese and in English, is a comprehensive monthly periodical focused on the fields of inorganic and non-metallic materials. The main purpose of the JCCS is to report the latest creative achievements in research, production and design for ceramics, glass, cementing materials, refractory, artificial crystals and other non-metallic materials. JCCS is regarded as an important journal in inorganic and non-metallic materials sciences in China and has been awarded by China Association for Science and Technology. The full-text of papers in JCCS is also published by CNKI (China National Knowledge Infrastructure). JCCS is indexed in EI Compendex, CA( Chemical Abstracts) ,SA and Ж and more than 20 databases.
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