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Spontaneous Bubble Formation in Silicate Melts at High Temperatures
Author(s) -
RASUL C. G.,
CABLE M.
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.tb13165.x
Subject(s) - bubble , silicate , mineralogy , liquid bubble , sulfur , thermodynamics , oxygen , materials science , chemistry , metallurgy , mechanics , organic chemistry , physics
Heating previously melted glasses usually produces gas bubbles in the melt at constant pressure. Bubble formation generally occurs in a narrow temperature range; if experimental conditions are carefully controlled the temperature at which gas bubbles form and the characteristics of the bubbles can be reproduced with reasonable accuracy. Extensive measurements were made with binary silicates of lithia, soda, and potash. Significant bubble evolution occurred only when there was sulfur in the glass. Bubbles formed at quite high temperatures (1400° to 1500°C) in dry oxygen but did not form in reducing atmospheres and quite stable foams resulted. In dry reducing atmospheres some bubble formation was observed at lower temperatures (1200° to 1300°C). The behavior was considerably altered in atmospheres containing water vapor and by changes in base glass composition or sulfur content.