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Influence of citric acid content on magnetic properties of BaFe12O19 powder prepared by sol-gel auto-combustion method

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Journal of Shanghai University (English Edition)

Abstract

BaFe12O19 powders with nanocrystalline sizes were produced by sol-gel auto-combustion method. The precursors were prepared under the molar ratios of citric acid to the metal nitrate of 0.5, 1.0 and 1.5. Appropriate ethylene diamine (C2H8N2) was added in order to adjust pH of 7. The ions distribution of citric acid at different pH explains the effect of citric acid in the starting solution. The XRD patterns of the as-burnt powders and annealing powders show different phases for different citric acid content. In addition, the lattice constants (a, c) derived from X-ray diffraction pattern were changed from 0.58881 nm to 0.58997 nm and 2.32057 nm to 2.32296 nm respectively. The data from VSM indicated that the powder with high citric acid content took on good magnetic properties. Pure single BaFe12O19 of the specific maximum magnetization M(1 T) ≈ 49.73 Am2/kg, the specific remanent magnetization M r ≈ 30.77 Am2/kg and the coercive force H c ≈ 467 kA/m was produced when the molar ratios of citric acid to the metal nitrate was 1.5.

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Authors and Affiliations

  1. Department of Physics, College of Sciences, Shanghai University, Shanghai, 200444, P. R. China

    Zhong Min-jian  (钟敏建) (Prof.), Xu Guo-qing  (徐国庆), Ma Hong-liang  (马洪良), Zhou Jiong  (周炯), Yue Zhong-yue  (岳中岳) & He Zheng-ming  (何正明)

Authors
  1. Zhong Min-jian  (钟敏建)
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  2. Xu Guo-qing  (徐国庆)
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  3. Ma Hong-liang  (马洪良)
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  4. Zhou Jiong  (周炯)
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  5. Yue Zhong-yue  (岳中岳)
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  6. He Zheng-ming  (何正明)
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Correspondence to Zhong Min-jian  (钟敏建).

Additional information

Project supported by the Shanghai Nano-Technology Promotion Center and Science and Technology of Shanghai Municipality (Grant No.O452nm049)

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Zhong, Mj., Xu, Gq., Ma, Hl. et al. Influence of citric acid content on magnetic properties of BaFe12O19 powder prepared by sol-gel auto-combustion method. J. of Shanghai Univ. 11, 263–267 (2007). https://doi.org/10.1007/s11741-007-0315-z

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  • DOI: https://doi.org/10.1007/s11741-007-0315-z

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