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Properties of Sm 2 O 3 ─Al 2 O 3 ─SiO 2 Glasses for In Vivo Applications
Author(s) -
Erbe Erik M.,
Day Delbert E.
Publication year - 1990
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.1151-2916.1990.tb06750.x
Subject(s) - thermal expansion , analytical chemistry (journal) , mineralogy , softening point , materials science , dissolution , atmospheric temperature range , chemical composition , nuclear chemistry , chemistry , metallurgy , thermodynamics , composite material , physics , organic chemistry , chromatography
The compositional range for glass formation below 1600°C in the Sm 2 O 3 ─Al 2 O 3 ─SiO 2 system is (9–25)Sm 2 O 3 ─(10–35)Al 2 O 3 ─(40–75)SiO 2 (mol%). Selected properties of the Sm 2 O 3 ─Al 2 O 3 ─SiO 2 (SmAS) glasses were evaluated as a function of composition. The density, refractive index, microhardness, and thermal expansion coefficient increased as the Sm 2 O 3 content increased from 9 to 25 mol%, the values exceeding those for fused silica. The dissolution rate in 1 N HCl and in deionized water increased with increasing Sm 2 O 3 content and with increasing temperature to 70°C. The transformation temperature ( T g ) and dilatometric softening temperature ( T d ) of the SmAS glasses exceeded 800° and 850°C, respectively.