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Heat Capacities of Glasses and Liquids in the Pseudobinary System Ge x As 40‐x S 60
Author(s) -
SCHNAUS URBAN E.,
MARSHALL ANN,
MOYNIHAN CORNELIUS T.
Publication year - 1972
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.1151-2916.1972.tb11253.x
Subject(s) - heat capacity , glass transition , debye model , thermodynamics , excess heat , materials science , specific heat , debye , function (biology) , composition (language) , mineralogy , chemistry , polymer , composite material , physics , organic chemistry , linguistics , philosophy , evolutionary biology , biology
Heat capacities were measured from 180° to 720°K for glasses and liquids in the vitreous system Ge x As 40‐x S 60 , (the subscripts signify atomic percent). Glass heat capacities are well described by the Debye function for the vibrational heat capacity of solids. A maximum in the glass transition temperature, T g , and a minimum in the heat‐capacity change at T g , δC p , occur near the composition for which x =30. These extrema are ascribed to a change near that composition in the effect of replacing As with Ge from network‐making to network‐disrupting.