Journal of Materials Science

, Volume 21, Issue 2, pp 625–629

Pressure-induced polymorphous crystallization in bulk Si20Te80 glass

  • S. Asokan
  • E. S. R. Gopal
  • G. Parthasarathy
Article

Abstract

The effect of pressure on the electrical resistivity of bulk Si20Te80 glass has been studied up to a pressure of 8 GPa. A discontinuous transition occurs at a pressure of 7 GPa. The X-ray diffraction studies on the pressure quenched sample show that the high pressure phase is crystalline with hexagonal structure (c/a = 1.5). On heating, the high pressure hexagonal phase has on exothermic decomposition atT = 586 K into two crystalline phases, which are the stable phases tellurium and SiTe2 obtained by simple heating of the glass.

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Copyright information

© Chapman and Hall Ltd. 1986

Authors and Affiliations

  • S. Asokan
    • 1
  • E. S. R. Gopal
    • 1
  • G. Parthasarathy
    • 2
  1. 1.Department of PhysicsIndian Institute of ScienceBangaloreIndia
  2. 2.Instrumentation and Services UnitIndian Institute of ScienceBangaloreIndia

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