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Effects of Atmosphere on the Microstructure and Magnetic Properties of Strontium Ferrites with Microwave-Assisted Sintering

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Abstract

The effects of atmosphere on the microstructure and magnetic properties of strontium ferrites have been investigated in this work by applying the microwave-assisted sintering process. Two different atmospheres have been selected, including micro vacuum (P = 0.025 ∼0.03 MPa) and adequate oxygen (continuously bubbled air into the oven cavity). Compared with the samples sintered in micro vacuum, the samples sintered in adequate oxygen show significant increase in magnetic properties, especially the remanence and coercivity. The optimal magnetic properties of strontium ferrite sintered at 1050 °C in adequate oxygen atmosphere are obtained as remanence (B r), coercivity (H cj), and maximum magnetic energy product ((BH)max) of 422.5 mT, 386.1 kA/m, and 32.26 kJ/m3, respectively.

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Acknowledgment

This work was supported by the Project of the Shanghai Education Commission of the People’s Republic of China (14ZZ165 and J51504) and state key laboratory for advanced metals and materials of the People’s Republic of China (2013–Z02).

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Authors and Affiliations

  1. Department of Material Science and Engineering, Shanghai Institute of Technology, Shanghai, 201418, China

    Minglin Jin, Xiuting Wang, Zhanyong Wang, Hanhan Jiang & Kejia Liu

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  1. Minglin Jin
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  2. Xiuting Wang
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  3. Zhanyong Wang
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  4. Hanhan Jiang
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  5. Kejia Liu
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Correspondence to Minglin Jin.

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Jin, M., Wang, X., Wang, Z. et al. Effects of Atmosphere on the Microstructure and Magnetic Properties of Strontium Ferrites with Microwave-Assisted Sintering. J Supercond Nov Magn 28, 3059–3063 (2015). https://doi.org/10.1007/s10948-015-3117-3

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  • DOI: https://doi.org/10.1007/s10948-015-3117-3

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