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Abstract <p>High-temperature properties of the CdWO<sub>4</sub> cadmium tungstate crystal are studied. This crystal has broad practical applications, e.g. as a scintillator, due to its optical and radiative properties. CdWO<sub>4</sub> preserves high structural stability up to 1150&#xa0;°C and begins to decompose at 1200&#xa0;°C. Crystal lattice parameters and thermal expansion coefficients are calculated. The latter exhibit the largest expansion along the b axis. High transmittance of the studied sample in the ~0.32-5.0&#xa0;µm range confirms high optical quality of the crystal and its prospects in photonic applications. The photoluminescence study in the 23-200&#xa0;°C range reveals two types of luminescence transitions <i>E</i>1 and <i>E</i>2 and shows that the intensity of the spectrum decreases with increasing temperature and vanishes at 200&#xa0;°C. It is shown that the tendency of intensity decrease depends on the excitation wavelength.</p>

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CdWO4 Crystal: Thermal Expansion Coefficients, High-Temperature Photoluminescence

  • 期刊论文

  • 发表日期：

    2025年4月1日

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  • A. A. Ryadun,
  • A. P. Elisseyev,
  • A. B. Kuznetsov,
  • A. E. Musikhin,
  • V. D. Grigorieva

摘要

Abstract

High-temperature properties of the CdWO4 cadmium tungstate crystal are studied. This crystal has broad practical applications, e.g. as a scintillator, due to its optical and radiative properties. CdWO4 preserves high structural stability up to 1150 °C and begins to decompose at 1200 °C. Crystal lattice parameters and thermal expansion coefficients are calculated. The latter exhibit the largest expansion along the b axis. High transmittance of the studied sample in the ~0.32-5.0 µm range confirms high optical quality of the crystal and its prospects in photonic applications. The photoluminescence study in the 23-200 °C range reveals two types of luminescence transitions E1 and E2 and shows that the intensity of the spectrum decreases with increasing temperature and vanishes at 200 °C. It is shown that the tendency of intensity decrease depends on the excitation wavelength.