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Abstract <p>A study of GeTe doped with Pb and Bi (Ge<sub>0.86</sub>Pb<sub>0.1</sub>Bi<sub>0.04</sub>Te), used as a thermoelectric material, after heat treatment at 600 and 820 K demonstrates the potential and challenges of determining the chemical and phase composition of the matrix and precipitates using &#xa0;X-ray diffraction and analytical electron microscopy. The main phase is rhombohedral <i>R</i>3<i>m</i> GeTe (over 90 wt %); cubic GeTe (up to 5 wt %), cubic Ge (up to 2 wt %), and trace amounts of germanium oxide have been identified. The distribution of Pb and Bi impurities in the matrix crystal and secondary phase precipitates has been determined.</p>

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X-ray Diffraction and Analytical Electron Microscopy Study of Rhombohedral and Cubic phases in Pb-Bi-doped GeTe Alloy

  • 期刊论文

  • 发表日期：

    2026年2月1日

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  • E. I. Suvorova,
  • A. G. Ivanova,
  • N. A. Arkharova,
  • V. V. Klechkovskaya,
  • A. A. Shabaldin,
  • A. T. Burkov

摘要

Abstract

A study of GeTe doped with Pb and Bi (Ge0.86Pb0.1Bi0.04Te), used as a thermoelectric material, after heat treatment at 600 and 820 K demonstrates the potential and challenges of determining the chemical and phase composition of the matrix and precipitates using  X-ray diffraction and analytical electron microscopy. The main phase is rhombohedral R3m GeTe (over 90 wt %); cubic GeTe (up to 5 wt %), cubic Ge (up to 2 wt %), and trace amounts of germanium oxide have been identified. The distribution of Pb and Bi impurities in the matrix crystal and secondary phase precipitates has been determined.