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Abstract <p>The solid-phase exchange method is a promising direction in the synthesis of micron- and nanoscale materials. The mechanism and energy of the reactions are determined by the exchange of parts of molecules involved in the interaction. The solid-phase synthesis of zinc ferrite in the ZnSO<sub>4</sub>‒Fe<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>–Na<sub>2</sub>O<sub>2</sub> system is considered as an object of research. Thermodynamic calculations show that the temperature in the reaction system reaches 1300 K, which is sufficient for the formation of ferrite. The sodium sulfate and oxygen formed in the reaction prevent the agglomeration of ferrite particles. A mathematical model of the process is proposed, including differential equations of solid-phase chemical kinetics and energy balance under non-isothermal conditions. A software implementation of the model is developed. Numerical analysis establishes that the thermophysical parameters of the system and side reactions have a significant effect on the process of ferrite formation. Increasing sample size and decreasing heat loss contribute to the formation of zinc ferrite. Zinc ferrite powders are obtained and their magnetic characteristics are determined.</p>

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Analysis of the Process of Zinc Ferrite Formation During Solid-Phase Exchange in the ZnSO4‒Fe2(SO4)3‒Na2O2 System under Dynamic Heating Conditions

  • 期刊论文

  • 发表日期：

    2025年6月1日

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  • V. V. Shapovalov,
  • A. A. Berestovaya

摘要

Abstract

The solid-phase exchange method is a promising direction in the synthesis of micron- and nanoscale materials. The mechanism and energy of the reactions are determined by the exchange of parts of molecules involved in the interaction. The solid-phase synthesis of zinc ferrite in the ZnSO4‒Fe2(SO4)3–Na2O2 system is considered as an object of research. Thermodynamic calculations show that the temperature in the reaction system reaches 1300 K, which is sufficient for the formation of ferrite. The sodium sulfate and oxygen formed in the reaction prevent the agglomeration of ferrite particles. A mathematical model of the process is proposed, including differential equations of solid-phase chemical kinetics and energy balance under non-isothermal conditions. A software implementation of the model is developed. Numerical analysis establishes that the thermophysical parameters of the system and side reactions have a significant effect on the process of ferrite formation. Increasing sample size and decreasing heat loss contribute to the formation of zinc ferrite. Zinc ferrite powders are obtained and their magnetic characteristics are determined.