Phase Stability of Fluoride Glasses.

Abstract

The techniques of scanning electron microscopy, energy dispersive x-ray micro-analysis, dark-field transmission electron microscopy, and thermal analysis were combined to study the phase stability of the CdF2-LiF-A1F3-PbF2 glass system. The selected composition, presumed to be the most stable, exhibited a liquid-liquid immiscibility phase transition, which led to the formation of two amorphous phases consisting of a matrix near the original glass composition and an isolated spherical phase which was richer in CdF2 and poorer in PbF2 than the matrix. Subsequent secondary phase separation and crystallization are observed with heat treatments. Keywords: Phase separation, Fluoride glasses, Electron microscopy, Liquid-liquid immiscibility, Phase-stability - Flouride glasses.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1987
Accession Number
ADA182174

Entities

People

  • Catherine J. Simmons
  • Joseph H. Simmons

Organizations

  • The Catholic University of America

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Crystallization
  • Crystals
  • Electron Microscopes
  • Electron Microscopy
  • Fluoride Glass
  • Glass Transition Temperature
  • Heat Energy
  • Heat Treatment
  • Light Scattering
  • Microscopy
  • Phase
  • Phase Separation
  • Phase Transformations
  • Scattering
  • Transition Temperature
  • X Rays

Readers

  • Electrical Engineering
  • Thin Film Deposition Science.

Technology Areas

  • Microelectronics