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<p>This study investigates the structural, thermal, and electrical properties of Pb₁₋<i>ₓ</i>Ca<i>ₓ</i>TiO₃ perovskite with varying calcium concentrations (<i>x</i> = 0, 0.5, and 1) using a combination of energy-dispersive spectroscopy (EDS), scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric (TGA), differential thermal analysis (DTA), and electric impedance (Z). XRD patterns reveal significant structural differences influenced by calcium substitution, such as changes in diffraction amplitudes and peak positions. These variations are attributable to the different unit cell of the samples. Such disparities are critical for tailoring perovskite properties for specific applications. TGA results indicate weight loss profiles corresponding to decomposition and water loss at varying temperatures. DTA highlights endothermic/exothermic transitions, aiding in the identification of phase transitions and thermal events significant for industrial and technological applications. The real and imaginary parts of impedance reveal trends in conductivity, dielectric properties, and charge transport mechanisms. The results demonstrate that calcium enhances the ionic conductivity of PbTiO₃, making these materials suitable for high-frequency applications such as capacitors.</p>

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Influence of calcium substitution on the structural, thermal, and electrical properties of PbTiO₃ perovskite

  • 期刊论文

  • 发表日期：

    2025年7月15日

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  • Tahani A. Alrebdi,
  • Fatemah H. Alkallas,
  • Lamiaa G. Amin,
  • Abdel-Haleem Abdel-Aty,
  • Khairiah Alshehri,
  • Amnah Alofi,
  • Hosam M. Gomaa

摘要

This study investigates the structural, thermal, and electrical properties of Pb₁₋ₓCaₓTiO₃ perovskite with varying calcium concentrations (x = 0, 0.5, and 1) using a combination of energy-dispersive spectroscopy (EDS), scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric (TGA), differential thermal analysis (DTA), and electric impedance (Z). XRD patterns reveal significant structural differences influenced by calcium substitution, such as changes in diffraction amplitudes and peak positions. These variations are attributable to the different unit cell of the samples. Such disparities are critical for tailoring perovskite properties for specific applications. TGA results indicate weight loss profiles corresponding to decomposition and water loss at varying temperatures. DTA highlights endothermic/exothermic transitions, aiding in the identification of phase transitions and thermal events significant for industrial and technological applications. The real and imaginary parts of impedance reveal trends in conductivity, dielectric properties, and charge transport mechanisms. The results demonstrate that calcium enhances the ionic conductivity of PbTiO₃, making these materials suitable for high-frequency applications such as capacitors.