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Phase Stability of CdF 2 ‐LiF‐AIF 3 ‐PbF 2 Glasses
Author(s) -
ELBAYOUMI OSAMA H.,
SIMMONS CATHERINE J.,
CLAUSEN EDWARD M.,
SUSCAVAGE MICHAEL J.,
SIMMONS JOSEPH H.
Publication year - 1987
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1987.tb05685.x
Subject(s) - crystallization , transmission electron microscopy , amorphous solid , analytical chemistry (journal) , phase (matter) , materials science , glass transition , scanning electron microscope , optical microscope , phase transition , mineralogy , crystallography , chemistry , thermodynamics , polymer , composite material , physics , nanotechnology , chromatography , organic chemistry
The techniques of scanning electron microscopy, energy dispersive X‐ray microanalysis, and dark‐field transmission electron microscopy were combined to study the phase stability of CdF 2 ‐LiF‐AlF 3 ‐PbF 2 glasses. The selected compositions, presumed to be exceptionally stable, exhibited a liquid‐liquid immiscibility phase transition; this 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 CdF 2 and poorer in PbF 2 than the matrix. Subsequent secondary‐phase separation and crystallization were observed following heat treatments near the glass transition temperature.