Hostname: page-component-54dcc4c588-5q6g5 Total loading time: 0 Render date: 2025-09-12T02:41:31.936Z Has data issue: false hasContentIssue false
  • English
  • Français

Thermodynamic and Structural Models Compared with the Initial Dissolution Rates of “SON” Glass Samples

Published online by Cambridge University Press:  25 February 2011

I. Tovena ,
T. Advocat ,
D. Ghaleb ,
E. Vernaz  and
F. Larche
I. Tovena
Affiliation:
CEA Rhône Valley Nuclear Research Center-SCD, BP 171, 30200 Bagnols-sur-Cèze Cedex, France
T. Advocat
Affiliation:
CEA Rhône Valley Nuclear Research Center-SCD, BP 171, 30200 Bagnols-sur-Cèze Cedex, France
D. Ghaleb
Affiliation:
CEA Rhône Valley Nuclear Research Center-SCD, BP 171, 30200 Bagnols-sur-Cèze Cedex, France
E. Vernaz
Affiliation:
CEA Rhône Valley Nuclear Research Center-SCD, BP 171, 30200 Bagnols-sur-Cèze Cedex, France
F. Larche
Affiliation:
Laboratoire de Dynamique des Phases Condensés, Université de Montpellier II, France
Get access

Abstract

The experimentally determined initial dissolution rate R 0 of nuclear glass was correlated with thermodynamic parameters and structural parameters. The initial corrosion rates of six “R7T7” glass samples measured at 100°C in a Soxhlet device were correlated with the glass free hydration energy and the glass formation enthalpy. These correlations were then tested with a group of 26 SON glasses selected for their wide diversity of compositions. The thermodynamic models provided a satisfactory approximation of the initial dissolution rate determined under Soxhlet conditions for SON glass samples that include up to 15 wt% of boron and some alumina. Conversely, these models are inaccurate if the boron concentration exceeds 15 wt% and the glass contains no alumina. Possible correlations between R 0 and structural parameters, such as the boron coordination number and the number of nonbridging oxygen atoms, were also investigated. The authors show that R 0 varies inversely with the number of 4-coordinate boron atoms; conversely, the results do not substantiate published reports of a correlation between R 0 and the number of nonbridging oxygen atoms.

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 333: Symposium V – Scientific Basis for Nuclear Waste Management XVII , 1993 , 595
Copyright
Copyright © Materials Research Society 1994

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable

References

REFERENCES

1 Pacaud, F., Jacquet-Francillon, N., Terki, A. and Fillet, C., in Scientific Basis for Nuclear Waste Management XII, eds. Lutze, Werner and Ewing, Rodney C., (Material Research Society, 1989) pp. 105–120.Google Scholar
2 Feng, X. and Barkatt, A., Mat. Res. Soc. Symp. Proc. 112, 543 (1988).CrossRefGoogle Scholar
3 Newton, R.G. and Paul, A., Glass Technology 21, 307 (1980).Google Scholar
4 Jantzen, C.M. and Plodinec, M.J., J. Non-Crystalline Solids 67, 207 (1984).CrossRefGoogle Scholar
5 Dell, W.J. and Bray, P.J., J. Non-Crystalline Solids 58, 1–16 (1983).CrossRefGoogle Scholar
6 Yun, Y.H. and Bray, P.J., J. Non-Crystalline Solids 27, 363 (1978).CrossRefGoogle Scholar
7 Noguès, J.L., PhD Thesis, University of Montpellier, France (1984).Google Scholar
8 The NBS Tables of Chemical Thermodynamic Properties, J. Phys. Chem. Ref. Data, 11 (2) (1982).Google Scholar
9 Milberg, M.E., in Physics and Chemistry of Glasses, 3, 13 (1972).Google Scholar
10 Xiao, S.Z., J. Non-Crystalline Solids 45, 29 (1981).CrossRefGoogle Scholar
11 Bray, P. J. and Lui, M.L., in Structure and Bonding in Microcrystalline Solids (1986) p. 285.CrossRefGoogle Scholar
12 Zhdanov, S.P. et al. , in The Structure of Glass, 8 (1973).Google Scholar
13 Haller, W., Blackburn, D.H., Wagstaff, F.E. and Charles, R.J., J. ofAmer. Ceram. Soc, 53 (1958).Google Scholar