Correlating the microstructure with magnetic properties of Ti-doped high-frequency MnZn ferrite |
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| Affiliation: | 1. School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Key Laboratory of Novel Materials for Information Technology of Zhejiang Province, Zhejiang University, Hangzhou 310027, China;2. Institute of Advanced Magnetic Materials, College of Materials & Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310012, China;1. Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, International Center for Dielectric Research, School of Electronic Science and Engineering & International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology, Xi’an Jiaotong University, Xi’an 710049, China;2. School of Microelectronics, Xidian University, Xi’an 710071, China;3. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;4. State Key Laboratory for Manufacturing Systems Engineering & International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology, Xi''an Jiaotong University, Xi''an 710049, China;1. School of Material Science and Engineering, Zhengzhou University, Henan 450001, China;2. School of Material Science and Engineering, Luoyang Institute of Science and Technology, Henan 471023, China;3. State Key Laboratory of Advanced Refractories, Sinosteel Luoyang Institute of Refractories Research Co., Ltd., Henan 471039, China;1. Univ. Grenoble Alpes, CEA, Liten, DTNM, 38000 Grenoble, France;2. CEA DAM Le Ripault, F-37260 Monts, France;1. Provincial Key Laboratory of Informational Service for Rural Area of Southwestern Hunan, Shaoyang University, Shaoyang 422000, China;2. College of Information Engineering, Shaoyang University, Shaoyang 422000, China;1. School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China;2. Tianjin Dagang Oilfield Shengda Technology Company Limited 300280, China;3. Mianyang Westmag Technology Corporation Limited 621000, China;1. Department of Applied and Environmental Chemistry, Interdisciplinary Excellence Centre, University of Szeged, H-6720, Rerrich Béla tér 1, Szeged 6720, Hungary;2. HK-Ceram Ltd., Bese László utca 10, Szentes 6600, Hungary;3. MTA-SZTE Reaction Kinetics and Surface Chemistry Research Group, University of Szeged, Rerrich Béla tér 1, Szeged 6720, Hungary |
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| Abstract: | In this study, high-frequency MnZn ferrites are prepared for power applications at 10 MHz using solid-state reaction method. The sample doped with 3000 ppm TiO2 yields the optimal comprehensive magnetic properties, with an initial permeability of 792, power loss of 415 kW/m3 (10 MHz, 5 mT, 25 ℃), and saturation induction of 460 mT. This indicates significant progress compared to previously reported results. The mechanisms of property optimisation, microstructure and domain structure evolution also discussed with TiO2 doping. The precipitation of Ti at the grain boundary can promote a high-density microstructure and favour the formation of magnetic monodomain in MnZn ferrites. Our results elucidate the correlations between microstructure, domain structure, and high-frequency performance, and present a potential roadmap for the development of high-frequency soft magnetic ferrites. |
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| Keywords: | MnZn ferrite MHz application Magnetization process Residual loss Monodomain structure |
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