Surface Tensions of Basic NaCl-AlCl3 and LiCl-AlCl3 Binary Melts

Yuzuru Sato, Mikio Fukasawa, Kenji Abe, Tsutomu Yamamura

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Surface tensions of basic NaCl-AlCl3 and LiCl-AlCl3 binary melts were measured by using capillary-rise method up to 1200 K precisely. It was found that the adding very small amount of AlCl3 into NaCl or LiCl decreases the surface tension very steeply to less than half value of NaCl or LiCl. The surface enthalpy and surface entropy also decreases steeply. These phenomena are similar to the action by surface active agent although the phenomena are rare in molten salt systems. This is due to the formation of the compound of NaAlCl4 and LiAlCl4. The compound is considered to be concentrated in surface phase due to their lower coulombic energy, and resulted the decrease of surface tension and surface energy, and furthermore the increase of ordering on surface phase. Based on present results and the thermodynamic consideration, the concentrations of NaAlCl4 and LiAlCl4 in the surface phase were calculated.

Original languageEnglish
Pages (from-to)563-567
Number of pages5
JournalElectrochemistry
Volume67
Issue number6
DOIs
Publication statusPublished - 1999

Keywords

  • Aluminum chloride
  • Complex anion
  • High temperature melt
  • Surface tension

ASJC Scopus subject areas

  • Electrochemistry

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