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This paper presented the DC electrical transport and structural properties of xV2O5-(1-x)(0.35Nd2O3-0.65ZnO) glasses prepared by the melt-quenching process and the effect of V2O5 inclusion was investigated. Physical characteristics such as density and molar volume were found to be composition-dependent. The reducing nature of the density value predicts a less dense glass structure, and the incremental value in molar volume confirms an expansion in bond length that forms non-bridging oxygens (NBOs), which assists in the transport of small polarons or electrons, enhancing DC conductivity. X-ray diffraction patterns recognized the existence of amorphousness and various nano-crystallites, which was confirmed by field emission scanning electron microscopy (FESEM) images. It was observed that DC conductivity increases with temperature rise, revealing semiconducting properties and the hopping mechanism of small polarons was responsible for DC electrical conductivity caused by the coexistence of V5+ and V4+ valence states. Because these materials are semiconducting and transition metal ions have distinct valence states, they can be employed for applications like gas sensors, even at higher temperatures.

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Study of Structural and DC Electrical Conductivity Mechanism of V2O5–Nd2O3–ZnO Glass System

  • 会议论文

  • 发表日期：

    2025年

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  • Ashes Rakshit,
  • Anindya Sundar Das,
  • Dipankar Biswas,
  • Debasish Roy

摘要

This paper presented the DC electrical transport and structural properties of xV2O5-(1-x)(0.35Nd2O3-0.65ZnO) glasses prepared by the melt-quenching process and the effect of V2O5 inclusion was investigated. Physical characteristics such as density and molar volume were found to be composition-dependent. The reducing nature of the density value predicts a less dense glass structure, and the incremental value in molar volume confirms an expansion in bond length that forms non-bridging oxygens (NBOs), which assists in the transport of small polarons or electrons, enhancing DC conductivity. X-ray diffraction patterns recognized the existence of amorphousness and various nano-crystallites, which was confirmed by field emission scanning electron microscopy (FESEM) images. It was observed that DC conductivity increases with temperature rise, revealing semiconducting properties and the hopping mechanism of small polarons was responsible for DC electrical conductivity caused by the coexistence of V5+ and V4+ valence states. Because these materials are semiconducting and transition metal ions have distinct valence states, they can be employed for applications like gas sensors, even at higher temperatures.