Thermodynamic properties of Si-Al, -Ca, -Mg binary and Si-Ca-Al, -Ti, -Fe ternary alloys

Takahiro Miki, Kazuki Morita, Nobuo Sano

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Metallic impurities such as Al, Ca, Mg, Ti, and Fe in Si deteriorate solar cell efficiency to a large extent. To discuss the possibility and efficiency of impurity elimination process, the evaluation of their thermodynamic properties in molten Si are crucial. In the present work, the self-interaction parameters of Al, Ca, and Mg and interaction parameters between Ca-M (M: Al, Ti, Fe) in molten Si at 1723 K were investigated by applying a chemical equilibration technique for Si based alloys with Pb. The activity coefficients of Al and Ca in molten Si at 1723-1823 K were also determined by the Knudsen effusion method.

Original languageEnglish
Pages (from-to)1108-1116
Number of pages9
JournalMaterials Transactions, JIM
Volume40
Issue number10
DOIs
Publication statusPublished - 1999 Oct

Keywords

  • Activity
  • Aluminum
  • Calcium
  • Interaction parameter
  • Iron
  • Knudsen effusion
  • Magnesium
  • Silicon
  • Thermodynamics
  • Titanium

ASJC Scopus subject areas

  • Engineering(all)

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