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<p>In this communication, structural, microstructural, dielectric, and electrical properties of the Mg₂FeVO₆ ceramics are reported. The preliminary structural analysis confirmed the formation of a solid solution of the major phase of cubic symmetry (#Ia-3d), which is matched up to 43.92%. The average crystallite size is calculated using both the Scherer and Williamson-Hall method, and the obtained values are 38.9&#xa0;nm and 54.2&#xa0;nm, respectively. The micro-lattice strain and dislocation density are found to be 0.000206 and 3.4 × 10<sup>14</sup> m<sup>− 2</sup>. Microstructural examination using scanning electron microscopy (SEM) revealed well-grown compact grains of size 191.5 <i>n</i>m, with an observed improvement in grain connectivity and densification. The sample purity is confirmed in terms of 100% presence of all constituent elements in weight and atomic form from EDX analysis. The analysis of the FTIR spectrum confirms the presence of all constituent atomic stretching vibrations. The study of dielectric measurements reveals Maxwell-Wagner’s type of polarization effect and shows a higher value of dielectric constant of 72,000 and lower energy dissipation. Impedance plots analysis demonstrated a decrease in grain boundary resistance and an overall enhancement in electrical conductivity attributed to NTCR character. The analysis of modulus plots reveals the presence of a non-Debye type of relaxation, while the ac conductivity study suggests the presence of a thermally activated conduction mechanism. The study of resistance versus temperature reveals the NTC thermistor character of the Mg₂FeVO₆ ceramics, offering a pathway to design advanced temperature sensors.</p>

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Studies of structure, microstructure, dielectric, and electrical properties of Mg2FeVO6 ceramic for device application

  • 期刊论文

  • 发表日期：

    2025年11月20日

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  • Jayakrushna Sahu,
  • B. N. Parida,
  • N. C. Nayak,
  • Rajib Padhee,
  • S. K. Parida

摘要

In this communication, structural, microstructural, dielectric, and electrical properties of the Mg₂FeVO₆ ceramics are reported. The preliminary structural analysis confirmed the formation of a solid solution of the major phase of cubic symmetry (#Ia-3d), which is matched up to 43.92%. The average crystallite size is calculated using both the Scherer and Williamson-Hall method, and the obtained values are 38.9 nm and 54.2 nm, respectively. The micro-lattice strain and dislocation density are found to be 0.000206 and 3.4 × 1014 m− 2. Microstructural examination using scanning electron microscopy (SEM) revealed well-grown compact grains of size 191.5 nm, with an observed improvement in grain connectivity and densification. The sample purity is confirmed in terms of 100% presence of all constituent elements in weight and atomic form from EDX analysis. The analysis of the FTIR spectrum confirms the presence of all constituent atomic stretching vibrations. The study of dielectric measurements reveals Maxwell-Wagner’s type of polarization effect and shows a higher value of dielectric constant of 72,000 and lower energy dissipation. Impedance plots analysis demonstrated a decrease in grain boundary resistance and an overall enhancement in electrical conductivity attributed to NTCR character. The analysis of modulus plots reveals the presence of a non-Debye type of relaxation, while the ac conductivity study suggests the presence of a thermally activated conduction mechanism. The study of resistance versus temperature reveals the NTC thermistor character of the Mg₂FeVO₆ ceramics, offering a pathway to design advanced temperature sensors.