A Metallurgical Route to Produce Upgraded Silicon and Monosilane

B. N. Mukashev, Kh A. Abdullin, M. F. Tamendarov, T. S. Turmagambetov, B. A. Beketov, M. R. Page, D. M. Kline

Research output: Contribution to journalArticlepeer-review

42 Scopus Citations


We studied alumothermic reduction of silica from silicate slag to obtain silicon-containing Alloy-I and Alloy-II. Phosphorous industry waste and synthetic slag are used as a silicate slag that consists of more than 90% silicon and calcium oxides and less than l0% other elemental oxides. Silicon-containing Alloy-I was upgraded by acid leaching to silicon of a fine powder structure. Using this powder, we grew poly- and mono-crystalline p-type silicon, with resistivity of ∼0.24 Ω cm, by the Czochralski method. Silicon-containing Alloy-II was used for obtaining monosilane by aqueous treatment with hydrochloric acid under atmospheric conditions and without any catalyst. There was no trace of diborane, which is a common source for boron contamination in crude silane.

Original languageAmerican English
Pages (from-to)1785-1791
Number of pages7
JournalSolar Energy Materials and Solar Cells
Issue number10
StatePublished - Oct 2009

NREL Publication Number

  • NREL/JA-520-46647


  • Acid leaching
  • Alumothermic reduction
  • Metallurgical-grade silicon
  • Solar-grade silicon
  • Solidification
  • Upgraded silicon


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