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Dependence of Melt Oxygen Activity and Water Retention on Composition of Amber Glass
Author(s) -
HARDING FOSTER L.
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.tb11312.x
Subject(s) - oxygen , chemistry , composition (language) , mineralogy , organic chemistry , philosophy , linguistics
Proportionalities were developed which are felt to express melt oxygen activity and free‐oxygen‐ion activity in amber glass melts. These expressions indicate that increased modifier levels generally increase melt oxygen activity. The field strength of the modifier cations is also involved in determining the melt oxygen activity. Glasses with higher field strengths resulted in lower melt oxygen activities. Compositional changes also affected the level of dissolved water retained by the glasses. Direct and indirect polarization influences on bridging‐oxygen sites were felt to play a dominant role in determining water concentration. Alkalis with higher field strengths and high SiO 2 levels favored higher water‐retention levels.