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<p>The present research is deliberated to engineer structurally-electrically stable lanthanum (La<sup>3</sup>⁺)-substituted bismuth–nickel ferrite perovskite material Bi<sub>2−<i>x</i></sub>La<sub><i>x</i></sub>Ni<sub>2</sub>Fe<sub>2</sub>O<sub>8</sub> with enhanced dielectric, ferroelectric, and optical performance. Structural analysis through X-ray diffraction and Williamson–Hall method confirm the polycrystalline structure with an average crystallite size of ~ 35.33&#xa0;nm, low strain (0.00139), and dislocation density of 8.01 × 10<sup>14</sup>&#xa0;m<sup>−2</sup>. Scanning Electron Microscopy (SEM) topography and Energy-Dispersive X-ray Analysis (EDAX) reveal uniform grain morphology, isotropy, and compositional homogeneity. The dielectric–impedance assessment reveals high permittivity, low loss, non-Debye thermal relaxation behavior, and important frequency–temperature stability. Fourier transform infrared spectroscopy (FTIR) analysis confirms the chemical composition, while Ultraviolet (UV)–Visible spectroscopy discloses stable optical band gap of ~ 3.4&#xa0;eV. The ceramic displays semiconducting characteristics and remnant ferroelectric polarization of 12&#xa0;μC&#xa0;cm<sup>−2</sup>, and strong temperature sensitivity of 0.71&#xa0;nF℃<sup>−1</sup>. The outlined synergistic multifunctional characteristics decisively position this material as a competent eco-friendly ceramic entity for advanced electronic device design, with its pronounced thermal sensing capability convincingly exemplified.</p>

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Processing and development of lanthanum-substituted bismuth–nickel ferrite electronic material for sensing device application

  • 期刊论文

  • 发表日期：

    2026年2月9日

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  • Priyadarshini Shivani Sahoo,
  • Satyanarayan Bhuyan,
  • Priyabrata Pattanaik,
  • Jagadish Chandra Padhi

摘要

The present research is deliberated to engineer structurally-electrically stable lanthanum (La3⁺)-substituted bismuth–nickel ferrite perovskite material Bi2−xLaxNi2Fe2O8 with enhanced dielectric, ferroelectric, and optical performance. Structural analysis through X-ray diffraction and Williamson–Hall method confirm the polycrystalline structure with an average crystallite size of ~ 35.33 nm, low strain (0.00139), and dislocation density of 8.01 × 1014 m−2. Scanning Electron Microscopy (SEM) topography and Energy-Dispersive X-ray Analysis (EDAX) reveal uniform grain morphology, isotropy, and compositional homogeneity. The dielectric–impedance assessment reveals high permittivity, low loss, non-Debye thermal relaxation behavior, and important frequency–temperature stability. Fourier transform infrared spectroscopy (FTIR) analysis confirms the chemical composition, while Ultraviolet (UV)–Visible spectroscopy discloses stable optical band gap of ~ 3.4 eV. The ceramic displays semiconducting characteristics and remnant ferroelectric polarization of 12 μC cm−2, and strong temperature sensitivity of 0.71 nF℃−1. The outlined synergistic multifunctional characteristics decisively position this material as a competent eco-friendly ceramic entity for advanced electronic device design, with its pronounced thermal sensing capability convincingly exemplified.