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Glass formation, properties and structure of soda-yttria-silica glassesThe glass formation region of the soda yttria silicate system was determined. The glasses within this region were measured to have a density of 2.4 to 3.1 g/cu cm, a refractive index of 1.50 to 1.60, a coefficient of thermal expansion of 7 x 10(exp -6)/C, softening temperatures between 500 and 780 C, and Vickers hardness values of 3.7 to 5.8 GPa. Aqueous chemical durability measurements were made on select glass compositions while infrared transmission spectra were used to study the glass structure and its effect on glass properties. A compositional region was identified which exhibited high thermal expansion, high softening temperatures, and good chemical durability.
Document ID
Document Type
Reprint (Version printed in journal)
Angel, Paul W.
(NASA Lewis Research Center Cleveland, OH, United States)
Hann, Raiford E.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 15, 2013
Publication Date
December 1, 1992
Publication Information
Publication: American Ceramic Society, Journal
Volume: 75
Issue: 12
ISSN: 0002-7820
Subject Category
Nonmetallic Materials
Accession Number
Funding Number(s)
PROJECT: RTOP 505-62-00
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