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The paper is devoted to determination of the mechanisms of permittivity dispersion in the frequency range of (8.2–12.4) GHz in solid solutionsSolid solution of the PbZr1-TiO3 (PZT)PbZrTiO (PZT) system depending on temperature, consideringPhase transition phase transitions. Dispersed-crystalline powders of the specified composition with different molar fractions of Zr and Ti, having phase transitions betweenAntiferroelectric antiferroelectric, ferroelectric and paraelectricParaelectric states in the temperature range of (25–250) °C, were chosen as the object of study. Measurements of the reflection and transmission coefficients in the specified temperature range were carried out in a waveguide measuring cell, and the complex permittivity was calculated by the Nicolson–Ross–Weir method. Dielectric relaxationRelaxation was detected in the studied frequency range, presumably associated with vibrations of atoms in the B-sublattice. The greatest relaxation losses occur in the ferroelectric state (rhombohedral phase) at elevated temperatures, presumably due to the repolarization of the unit cells. The PbZr0.97Ti0.03O3 composition has the smallest losses, being in the antiferroelectric state at temperatures close to room temperature.

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Dielectric Responses of Solid Solutions of the Binary PZT System in the Microwave Range at High Temperature

  • 会议论文

  • 发表日期：

    2025年

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  • Pavel Astafev,
  • Konstantin Andryushin,
  • Aleksey Pavelko,
  • Alexander Lerer,
  • Larisa Reznichenko

摘要

The paper is devoted to determination of the mechanisms of permittivity dispersion in the frequency range of (8.2–12.4) GHz in solid solutionsSolid solution of the PbZr1-TiO3 (PZT)PbZrTiO (PZT) system depending on temperature, consideringPhase transition phase transitions. Dispersed-crystalline powders of the specified composition with different molar fractions of Zr and Ti, having phase transitions betweenAntiferroelectric antiferroelectric, ferroelectric and paraelectricParaelectric states in the temperature range of (25–250) °C, were chosen as the object of study. Measurements of the reflection and transmission coefficients in the specified temperature range were carried out in a waveguide measuring cell, and the complex permittivity was calculated by the Nicolson–Ross–Weir method. Dielectric relaxationRelaxation was detected in the studied frequency range, presumably associated with vibrations of atoms in the B-sublattice. The greatest relaxation losses occur in the ferroelectric state (rhombohedral phase) at elevated temperatures, presumably due to the repolarization of the unit cells. The PbZr0.97Ti0.03O3 composition has the smallest losses, being in the antiferroelectric state at temperatures close to room temperature.