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Study on the crystallization of quartz glass crucibles for preparation of single crystal silicon

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2018, 28(3), pp.99~105
  • DOI : 10.6111/JKCGCT.2018.28.3.099
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering
  • Received : March 30, 2018
  • Accepted : May 17, 2018
  • Published : June 30, 2018

Jong Won Lim 1,  Tae Heui Kim 1,  Kyung Bong Park 1

1안동대학교

Accredited

ABSTRACT

In order to avoid un-uniform crystallization on the surface of a quartz glass crucible that is known to affect the production yield of the single crystal silicon, Ba (barium) was selected as a crystallization promotor and the inner surface of the crucible was coated using Ba (barium hydroxide octahydrate)-solution by the spray pyrolysis method. For un-coated crucible, it was found that the crystallization of its surface started at 1350 o C, and at 1450 o C the surface was uniformly crystallized with β-cristobalite phase. It was found that the crucible coated with Ba began to be crystallized from 1000 o C and was uniformly crystallized on the crucible surface at 1300 o C. In this case, α-cristobalite and needle-shaped BaSi2O5 phase were created and disappeared as a crystal phase, and the β-cristobalite phase was eventually evenly distributed over the Ba-coated crucible surface.

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