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<p>MnZn ferrites synthesized from the pickling by-product powder (Fe<sub>2</sub>O<sub>3</sub>) of the steel industry by varying Zn and Mn stoichiometry. A single step solid-state synthesis process in argon atmosphere with rapid atmospheric cooling was followed to achieve structurally modified MnZn ferrite with low coercivity. Among the stoichiometric variations, Mn-rich variant exhibited a highly strained body centered tetragonal (BCT) mixed spinel structure Mn<sub>0.75</sub>Zn<sub>0.75</sub>Fe<sub>1.5</sub>O<sub>4</sub> with Fe(Mn) octahedra distortion stabilized through the synthesis parameters. It demonstrates extremely low coercivity of 10.34 A/m i.e., 0.13 Oe, shallow hysteresis loss of 0.456&#xa0;J/m<sup>3</sup>, along with high permeability and high saturation magnetization. Phase evolution studies of all the synthesized powders were done through DTA-TG and Raman spectroscopy. The crystal structures were determined and verified through XRD and TEM respectively, while the morphologies were studied using SEM. Effect of Mn incorporation was studied through first-order electronic structure calculations capturing Bohr magneton, energy per unit cell and corresponding saturation magnetization which was experimentally verified through VSM. This work outlines a critically designed single step solid state synthesis process which can stabilize a highly strained BCT structured MnZn ferrite with a particular stoichiometry making it suitable for advanced soft magnetic core application.</p>

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Stress induced MnZn ferrite synthesis from pickling plant by-product of steel industry

  • 期刊论文

  • 发表日期：

    2025年6月12日

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  • Anushri Nag,
  • Devang Gandhi,
  • Bhagyaraj Jayabalan,
  • M Premkumar,
  • Abhishek Pathak,
  • Pavan Bijalwan,
  • A. N. Bhagat,
  • Manish Bhadu

摘要

MnZn ferrites synthesized from the pickling by-product powder (Fe2O3) of the steel industry by varying Zn and Mn stoichiometry. A single step solid-state synthesis process in argon atmosphere with rapid atmospheric cooling was followed to achieve structurally modified MnZn ferrite with low coercivity. Among the stoichiometric variations, Mn-rich variant exhibited a highly strained body centered tetragonal (BCT) mixed spinel structure Mn0.75Zn0.75Fe1.5O4 with Fe(Mn) octahedra distortion stabilized through the synthesis parameters. It demonstrates extremely low coercivity of 10.34 A/m i.e., 0.13 Oe, shallow hysteresis loss of 0.456 J/m3, along with high permeability and high saturation magnetization. Phase evolution studies of all the synthesized powders were done through DTA-TG and Raman spectroscopy. The crystal structures were determined and verified through XRD and TEM respectively, while the morphologies were studied using SEM. Effect of Mn incorporation was studied through first-order electronic structure calculations capturing Bohr magneton, energy per unit cell and corresponding saturation magnetization which was experimentally verified through VSM. This work outlines a critically designed single step solid state synthesis process which can stabilize a highly strained BCT structured MnZn ferrite with a particular stoichiometry making it suitable for advanced soft magnetic core application.