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<p>This study explored the effect of annealing temperature on the thermal, structural, morphological, and electrical properties of Ni<sub>0.6</sub>Cd<sub>0.4</sub>FeAlO<sub>4</sub> spinel ferrites fabricated via the sol–gel method. Rietveld analysis of x-ray diffraction measurement confirms its cubic spinel structure. An increase in calcination temperature causes the crystallite size and lattice parameters to increase for the specimens (S850 and S950). Fourier transform infrared (FTIR) spectra display two distinct stretching vibration bands (<i>v</i><sub>A</sub>). Subsequently, as the calcination temperature increases, the value of <i>v</i><sub>A</sub> also increases, reflecting the reduction of the bonds between the oxygen and the cations at the A sites. The investigation of electrical conductivity revealed semiconductor behavior in the specimens, aligning with the non-overlapping small polaron tunneling (NSPT) model. Additionally, the Ni<sub>0.6</sub>Cd<sub>0.4</sub>FeAlO<sub>4</sub> materials exhibit high electrical resistivity along with low dielectric constants and losses in high-frequency zones. These vital features highlight their suitability for use in applications requiring high frequencies and microwave technology.</p>

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Deep Insights into the Thermal, Structural, Electrical, Thermodynamic, and Dielectric Properties of Ni0.6Cd0.4FeAlO4 Spinel Ferrites Synthesized Under Different Annealing Temperatures for Various Applications

  • 期刊论文

  • 发表日期：

    2025年6月13日

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  • Fakher Hcini,
  • Jabeur Khelifi,
  • Latifa Ben Ammar,
  • Kamel Khirouni

摘要

This study explored the effect of annealing temperature on the thermal, structural, morphological, and electrical properties of Ni0.6Cd0.4FeAlO4 spinel ferrites fabricated via the sol–gel method. Rietveld analysis of x-ray diffraction measurement confirms its cubic spinel structure. An increase in calcination temperature causes the crystallite size and lattice parameters to increase for the specimens (S850 and S950). Fourier transform infrared (FTIR) spectra display two distinct stretching vibration bands (vA). Subsequently, as the calcination temperature increases, the value of vA also increases, reflecting the reduction of the bonds between the oxygen and the cations at the A sites. The investigation of electrical conductivity revealed semiconductor behavior in the specimens, aligning with the non-overlapping small polaron tunneling (NSPT) model. Additionally, the Ni0.6Cd0.4FeAlO4 materials exhibit high electrical resistivity along with low dielectric constants and losses in high-frequency zones. These vital features highlight their suitability for use in applications requiring high frequencies and microwave technology.