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<p>This study investigates the influence of manganese oxide chemical synthesis methods on the phase composition, microstructure, and magnetic properties of MnZn ferrites. Chemical precipitation produced α‑Mn<sub>2</sub>O<sub>3</sub> with a&#xa0;specific surface area of 1.1 m<sup>2</sup>/g, whereas sol-gel synthesis yielded α‑Mn<sub>3</sub>O<sub>4</sub> with a&#xa0;specific surface area of 4 m<sup>2</sup>/g. Ferrites sintered at 1300 °C using the chemically precipitated α‑Mn<sub>2</sub>O<sub>3</sub> exhibited an equiaxed grain structure with an average grain size of 6 ± 3 μm. In contrast, the use of sol-gel-derived α‑Mn<sub>3</sub>O<sub>4</sub> resulted in the formation of abnormally large ferrite grains with an average size of 120 ± 70 μm. The ferrites sintered with the chemically precipitated manganese oxide demonstrated a&#xa0;25% higher initial magnetic permeability, along with lower coercivity and magnetic loss levels.</p>

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Influence of manganese oxide synthesis method on the structure and properties of MnZn ferrites

  • 期刊论文

  • 发表日期：

    2026年1月12日

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  • R. R. Khabirov,
  • R. I. Kuzmin,
  • A. V. Mass,
  • A. A. Miller,
  • M. Yu. Agafonov,
  • N. S. Aleksandrova,
  • V. A. Bataev

摘要

This study investigates the influence of manganese oxide chemical synthesis methods on the phase composition, microstructure, and magnetic properties of MnZn ferrites. Chemical precipitation produced α‑Mn2O3 with a specific surface area of 1.1 m2/g, whereas sol-gel synthesis yielded α‑Mn3O4 with a specific surface area of 4 m2/g. Ferrites sintered at 1300 °C using the chemically precipitated α‑Mn2O3 exhibited an equiaxed grain structure with an average grain size of 6 ± 3 μm. In contrast, the use of sol-gel-derived α‑Mn3O4 resulted in the formation of abnormally large ferrite grains with an average size of 120 ± 70 μm. The ferrites sintered with the chemically precipitated manganese oxide demonstrated a 25% higher initial magnetic permeability, along with lower coercivity and magnetic loss levels.