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Metastable Liquid Immiscibility in Alkali Metal Oxide–Silica Systems
Author(s) -
CHARLES R. J.
Publication year - 1966
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.1151-2916.1966.tb13208.x
Subject(s) - metastability , alkali metal , oxide , annealing (glass) , materials science , metal , alkaline earth metal , mineralogy , phase (matter) , inorganic chemistry , spinodal decomposition , analytical chemistry (journal) , chemical engineering , chemistry , metallurgy , chromatography , organic chemistry , engineering
A search was made for evidence of metastable phase separation in binary alkali metal oxide‐silica glasses which had been subjected to the usual glassmaking procedures of melting, relatively fast cooling, and annealing. Electron microscopy and electrical properties measurements were the principal tools of investigation. Evidence for phase separation in Li 2 O and Na 2 O silica systems is given together with critical temperature estimates. Although K 2 O‐SiO 2 glasses showed some slight evidences of structural segregation it is concluded that binary K 2 O, Rb 2 O, and Cs 2 O silica glasses generally show simple solution behavior and allow reasonable correlations of properties with cation size, type, and separation.