Phase Separation in Ge-GeO2 Glasses.

Abstract

The results reported here on a 7.5 mole percent excess Ge composition using differential scanning calorimetry have shown that a two-step phase separation mechanism is operative. A homogeneous Ge-GeO2 glass phase separates at 450C into amorphous GeO2 and amorphous GeO. The GeO phase separates at 570C into crystalline Ge and amorphous GeO2. Additional support for a two-step phase separation mechanism is provided by kinetic arguments based on the viscosity dependence on composition and on the structure of the amorphous GeO phase and its stability relative to the homogeneous Ge-GeO2 glass. (Modified author abstract)

Document Details

Document Type
Technical Report
Publication Date
May 01, 1974
Accession Number
AD0781718

Entities

People

  • C. H. Drummond Iii
  • D. Turnbull

Organizations

  • Harvard University

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Calorimetry
  • Phase
  • Phase Separation
  • Scanning

Readers

  • Polymer Science and Engineering.
  • Polymer Science and Technology
  • Software Engineering