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Glass formation and properties in the system calcia-gallia-germaniaThe critical cooling rate for glass formation, R sub c was measured for four compositions in the system calcia-gallia-germania. The activation energy, E, and frequency factor, nu, for the crystallization process were determined by reheating the glasses at varied constant heating rates and measuring the temperature of crystallization. Both E and nu increased, with increasing germania content of the glass, whereas R sub c decreased. The density, refractive index, and Abbe number were also measured; all decreased with increasing GeO2 content. These results are compared with those for calcia-gallia-silica glasses of comparable compositions.
Document ID
19860031312
Document Type
Reprint (Version printed in journal)
Authors
Angel, P. W. (Missouri Univ. Rolla, MO, United States)
Ray, C. S. (Missouri Univ. Rolla, MO, United States)
Day, D. E. (Missouri-Rolla, University Rolla, United States)
Date Acquired
August 12, 2013
Publication Date
November 1, 1985
Publication Information
Publication: American Ceramic Society, Journal
Volume: 68
ISSN: 0002-7820
Subject Category
NONMETALLIC MATERIALS
Funding Number(s)
CONTRACT_GRANT: NAS8-34758
Distribution Limits
Public
Copyright
Other