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Property Variation in Alkali Alkaline‐Earth Metaphosphate Glasses
Author(s) -
WILDER J.A.,
SHELBY J. E.
Publication year - 1984
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.1151-2916.1984.tb19732.x
Subject(s) - alkali metal , metaphosphate , alkaline earth metal , phosphate glass , thermal expansion , glass transition , thermal diffusivity , helium , inorganic chemistry , ion , phosphate , mineralogy , materials science , chemistry , analytical chemistry (journal) , thermodynamics , composite material , polymer , organic chemistry , physics
Coefficients of helium migration, coefficients of thermal expansion, and glass‐transition temperatures were measured for several series of alkali alkaline‐earth phosphate glasses. The helium permeability decreases with the field strength of alkali or alkaline‐earth ions in the order Na + > Li + and Mg 2+ > Ca 2+ > Ba2+. The glass‐transition temperature increases and coefficient of thermal expansion decreases with increasing field strength of alkali or alkaline‐earth ions. The relationship of lower molar volume, corresponding to decreased coefficients of helium diffusivity reported for other glass‐forming systems, occurs in the phosphate glasses.
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