Properties of Sm2O3─Al2O3─SiO2 Glasses for In Vivo Applications |
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Authors: | Erik M. Erbe Delbert E. Day |
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Affiliation: | Ceramic Engineering Department and Graduate Center for Materials Research, University of Missouri, Rolla, Missouri 65401 |
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Abstract: | The compositional range for glass formation below 1600°C in the Sm2O3─Al2O3─SiO2 system is (9–25)Sm2O3─(10–35)Al2O3─(40–75)SiO2 (mol%). Selected properties of the Sm2O3─Al2O3─SiO2 (SmAS) glasses were evaluated as a function of composition. The density, refractive index, microhardness, and thermal expansion coefficient increased as the Sm2O3 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 Sm2O3 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. |
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Keywords: | glass physical properties samarium alumina radioactive materials |
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