Accession Number : ADA182174

Title :   Phase Stability of Fluoride Glasses.

Descriptive Note : Final technical rept. May 84-Feb 85,

Corporate Author : CATHOLIC UNIV OF AMERICA WASHINGTON DC DEPT OF PHYSICS

Personal Author(s) : Simmons,Catherine J ; Simmons,Joseph H

PDF Url : ADA182174

Report Date : Feb 1987

Pagination or Media Count : 22

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.

Descriptors :   *FLUORIDES, *GLASS, *PHASE TRANSFORMATIONS, *X RAY SPECTROSCOPY, CRYSTALLIZATION, PHASE, SEPARATION, SECONDARY, AMORPHOUS MATERIALS, ELECTRON MICROSCOPY, HEAT TREATMENT, STABILITY, ELECTRONIC SCANNERS, THERMAL ANALYSIS, LITHIUM FLUORIDES, MICROANALYSIS, LIQUID PHASES, SOLUBILITY, PHASE STUDIES, OPTICAL GLASS, TRANSMISSIVITY, HEATING

Subject Categories : Ceramics, Refractories and Glass
      Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE