Development of Optimum Preparation Conditions of Fe-Deficient M-Type Ca–Sr–La System Hexagonal Ferrite Magnet
| Autor: | Shih-Hao Lin, Yung-Hsiung Hung, Chun-Hu Cheng, Ching-Chien Huang, Hsiao-Hsuan Hsu, Tsung-Han Hsiao, Chin-Chieh Mo, Chiu Chun-Hao, Yen-Hua Tai |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Materials science Iron oxide Analytical chemistry Order (ring theory) chemistry.chemical_element Type (model theory) 01 natural sciences Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry Magnet 0103 physical sciences Content (measure theory) Ferrite (magnet) Electrical and Electronic Engineering Cobalt Stoichiometry |
| Zdroj: | IEEE Transactions on Magnetics. 57:1-7 |
| ISSN: | 1941-0069 0018-9464 |
| DOI: | 10.1109/tmag.2020.3042095 |
| Popis: | In this work, an experiment was carried out to investigate the preparation condition of anisotropic Fe-deficient M-type Ca–Sr–La system ferrite with optimum magnetic and physical properties using the raw material Fe2O3 from steel industrial iron oxide waste. The compositions of the calcined ferrites were chosen according to the stoichiometry ${\mathrm {Ca}}_{1-x-y}$ La x Sr y Fe10.9CozO19, where M-type single-phase calcined powder was synthesized with a composition of $x = 0.45$ , $y = 0.18$ , and $z= 0$ . The effect of CaO, SiO2, and Co3O4 inter-additives on the Ca–Sr–La system ferrite was also discussed in order to obtain low-temperature sintered magnets. The magnetic properties of $B_{r} = 4570$ Gauss, $_{b}H_{c} = 4320$ Oe, $_{i}H_{c} = 5260$ Oe, and ( $BH$ ) $_{\mathrm {max}}= 5.16$ MGOe were obtained for Ca–Sr–La system hard magnets with low cobalt content at 1.85 wt%. The magnetic properties of the prepared magnets really good compared to that of the traditional Sr–La–cobalt (Co) M-type ferrite, which has been the highest grade M-type hard ferrite. The remarkable steel industrial iron oxide waste Fe2O3 is recycled to produce high-end permanent magnets under an output power of < 1 kW, which will eventually be used in high-efficiency motors. |
| Databáze: | OpenAIRE |
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