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<p>PbTe and PbSe are typical impurities in the selenium melt, and their behavior in the melt will affect the purity and subsequent purification of selenium. In this paper, the wetting behavior of selenium melt on PbTe and PbSe surfaces with different roughness during heating was studied by sessile drop method. The wetting temperature of Se/PbTe was determined to be above 221 °C by differential scanning calorimeter. The wetting parameters such as the apparent contact angle, height, and diameter of Se droplets on PbTe and PbSe substrates were measured by high-temperature microscope to analyze their wetting characteristics. The morphology evolution of the Se droplets at the interfaces was observed by scanning electron microscope. The results show that various factors influence the wetting behavior of Se droplets on the PbTe substrate, and the rough substrate shows better wettability. On the contrary, Se droplets are not wetted on the PbSe substrate, and the rough substrate inhibits the spreading of Se droplets. This study reveals the migration mechanism of PbTe and PbSe impurities in selenium melts, which provides a theoretical basis for removing Te and Pb impurities from crude selenium through the melt filtration process.</p>

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Wetting Process and Mechanism of PbSe and PbTe in Selenium Melts

  • 期刊论文

  • 发表日期：

    2025年1月24日

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  • Lang Liu,
  • JiLin He,
  • Huan Luo,
  • GuoZheng Zha,
  • RuYi Ji,
  • WenLong Jiang,
  • Bin Yang,
  • BaoQiang Xu,
  • XianJun Lei

摘要

PbTe and PbSe are typical impurities in the selenium melt, and their behavior in the melt will affect the purity and subsequent purification of selenium. In this paper, the wetting behavior of selenium melt on PbTe and PbSe surfaces with different roughness during heating was studied by sessile drop method. The wetting temperature of Se/PbTe was determined to be above 221 °C by differential scanning calorimeter. The wetting parameters such as the apparent contact angle, height, and diameter of Se droplets on PbTe and PbSe substrates were measured by high-temperature microscope to analyze their wetting characteristics. The morphology evolution of the Se droplets at the interfaces was observed by scanning electron microscope. The results show that various factors influence the wetting behavior of Se droplets on the PbTe substrate, and the rough substrate shows better wettability. On the contrary, Se droplets are not wetted on the PbSe substrate, and the rough substrate inhibits the spreading of Se droplets. This study reveals the migration mechanism of PbTe and PbSe impurities in selenium melts, which provides a theoretical basis for removing Te and Pb impurities from crude selenium through the melt filtration process.