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Fabrication, Characterization, and Magnetic Properties of BaAlFe11O19 Particles Via Auto Combustion Method

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Abstract

Al-substituted barium hexaferrite particles have been successfully synthesized via sol-gel auto combustion method in the presence of citric acid as fuel. Thermal decomposition, phase evolution, and the microstructure of products were characterized by DTA/TG, XRD, and SEM. Magnetic measurements were carried out on a VSM. To investigate the effects of citric acid to metal nitrate (CA/MN) molar ratios and combustion temperatures on the morphology, phase structure, and magnetic properties of products and finding the optimal condition, several experiments were carried out. The results revealed that the formation temperature, crystallite size as well as magnetic properties are significantly influenced by these parameters. A saturation magnetization of 56.96 emu/g and a coercivity of 7279 Oe were obtained in BaAlFe11O19 powders with CA/MN = 1.0. High Ms and Hc values make them particularly suitable for hard magnetic applications.

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Acknowledgments

We would like to acknowledge the financial support from the National Natural Science Foundation of China (No. 11174230).

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Authors and Affiliations

  1. School of Electronic and Electrical Engineering, Wuhan Textile University, Wuhan, China

    Danfeng Wang & Jianzheng Cheng

  2. School of Microelectronics, Xidian University, Xi’an, China

    Danfeng Wang & Chunlong Fei

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  1. Danfeng Wang
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  2. Jianzheng Cheng
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  3. Chunlong Fei
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Correspondence to Jianzheng Cheng or Chunlong Fei.

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Wang, D., Cheng, J. & Fei, C. Fabrication, Characterization, and Magnetic Properties of BaAlFe11O19 Particles Via Auto Combustion Method. J Supercond Nov Magn 29, 2327–2331 (2016). https://doi.org/10.1007/s10948-016-3538-7

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  • DOI: https://doi.org/10.1007/s10948-016-3538-7

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