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<p>This paper presents comparative volatility studies for the two molten salts researched as surrogate salts to FLiBe; FLiNaK and FLiNaZr. It was found that initial mass loss of FLiNaZr is dominated by water evaporation and hydrolysis to form HF. After this initial stage, the two salts exhibit comparable rates of vaporization at 700&#xa0;°C, during long-term applications. Methods of experimentation included isothermal thermogravimetric analysis (TGA), transpiration in a tube furnace, and long-term isothermal heating in a muffle furnace, open to a glove box atmosphere. Partial pressures of constituent metal fluorides in both salts were calculated using data from the TGA/transpiration experiments.</p>

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Comparative volatility measurements of molten FLiNaZr and FLiNaK

  • 期刊论文

  • 发表日期：

    2025年11月26日

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  • Padma Krishnakumar,
  • Michael Clegg,
  • Jim Steppan,
  • Tom Meaders,
  • Byron Millet,
  • Carlos Mejia,
  • Michael Simpson

摘要

This paper presents comparative volatility studies for the two molten salts researched as surrogate salts to FLiBe; FLiNaK and FLiNaZr. It was found that initial mass loss of FLiNaZr is dominated by water evaporation and hydrolysis to form HF. After this initial stage, the two salts exhibit comparable rates of vaporization at 700 °C, during long-term applications. Methods of experimentation included isothermal thermogravimetric analysis (TGA), transpiration in a tube furnace, and long-term isothermal heating in a muffle furnace, open to a glove box atmosphere. Partial pressures of constituent metal fluorides in both salts were calculated using data from the TGA/transpiration experiments.