It was formerly believed that phase separation occurs only in silica-alkaline earth oxide systems, where the drops are fairly large and can be observed with the aid of an optical microscope. Data on low-angle x-ray scattering and the results obtained by other methods indicate that glasses contain microheterogeneity regions of the order of 10 Å in size. The discovery of microcrystalline glasses and extensive applications of electron microscopy revealed micro- phase separation in the size range from 10 Å to several microns in glasses of the most diverse compositions.


Phase Separation Spinodal Decomposition Potassium Silicate Vitreous Silica Lithium Aluminosilicate 
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Literature Cited

  1. 1.
    Ya. A. Fedorovskii, Investigation of Initial Stages of Catalyzed Crystallization of Lithium Aluminosilicate Glasses, Dissertation, Inst. Obshch. Neorgan. Khim., Moscow (1966).Google Scholar

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© Consultants Bureau, New York 1973

Authors and Affiliations

  • Ya. A. Fedorovskii

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