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- Title
Density measurement of simulated radioactive waste glass by the Archimedean immersion method using molten chloride salts.
- Authors
Toru Sugawara; Takashi Shiono; Satoshi Yoshida; Jun Matsuoka; Kazuhiro Minami; Eiji Ochi
- Abstract
The densities of two simulated radioactive waste glasses and melts were determined between 298 and 1278 K by the Archimedean immersion method for annealed glasses at room temperature, dilatometric measurements for glasses in the temperature range from 373 K to the glass transition region and Archimedean densitometry using a molten chloride salt for liquids above 825 K. At temperatures above 1079 K the density of a stable liquid can be measured with a precision of 0·3%. The molar volume of the waste glass melt between 1079 and 1278 K is consistent with both the high temperature extrapolation of the molar volume at the glass transition temperature and the value estimated using partial molar volumes reported previously, which has been obtained using double-bob Archimedean densitometry. The temperature dependence of the molar volume (dV/dT) between the glass transition temperature and 1278 K is significantly larger than that calculated using partial molar thermal expansivities in the previous model. This suggests that the thermal expansivity of borosilicate melts is temperature dependent.
- Subjects
RADIOACTIVE wastes; GLASS transitions; DENSITOMETRY; MOLTEN glass; EXTRAPOLATION; GLASS transition temperature; BOROSILICATES
- Publication
Physics & Chemistry of Glasses: European Journal of Glass Science & Technology Part B, 2013, Vol 54, Issue 6, p270
- ISSN
1753-3562
- Publication type
Article