Reaction behavior of stratified SiO2 granules during electrochemical reduction in molten CaCl2

Xiao Yang, Kouji Yasuda, Toshiyuki Nohira, Rika Hagiwara, Takayuki Homma

研究成果: Article

15 引用 (Scopus)

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The electrochemical reduction behavior of stratified SiO2 granules in molten CaCl2 at 1123 K (850 °C) was investigated to develop a new process for producing solar-grade silicon. The cross sections of the electrolyzed electrode prepared from a graphite crucible filled with SiO2 granules were observed and analyzed. The visual and SEM observations indicate that the overall reduction proceeds via two different routes. In one route, the reduction proceeds along the granule surfaces from the SiO2 near the conductor to the distant SiO2. In the other route, the reduction proceeds from the granule surface to the core of each granule. The reduction along the granule surfaces is faster than that from the surface to the core. Fine SiO2 granules are expected to be favorable for a high reduction rate.

元の言語English
ページ(範囲)1337-1344
ページ数8
ジャーナルMetallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
45
発行部数4
DOI
出版物ステータスPublished - 2014 8

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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