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Tellurium and Palladium Diffusion in the German Waste Glass Vg 98/12 Measured with the Rbs Method

Published online by Cambridge University Press:  25 February 2011

M. Yamashita ,
Hj. Matzke  and
G. Linker
M. Yamashita
Affiliation:
European Institute for Transuranium Elements, CEC, JRC, Postfach 2340, W-7500 Karlsruhe, Germany
Hj. Matzke
Affiliation:
European Institute for Transuranium Elements, CEC, JRC, Postfach 2340, W-7500 Karlsruhe, Germany
G. Linker
Affiliation:
Kernforschungszentrum Karlsruhe, Institut für Nukleare Festkörperphysik, Postfach 3640, W-7500 Karlsruhe, Germany
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Abstract

The diffusion of Te and Pd was measured in the German waste glass VG 98/012 usingion implantation to introduce these elements, and the Rutherford backscattering (RBS) method to measure their diffusion. Both elements tend to precipitate during manufacture ofnuclear waste glasses, and the Te-content of the precipitates depends on the annealing time. Diffusion of these elements is a basic property of the separation phenomenon. Diffusion of both elements was found to be very slow. Te-diffusion coefficients were in the range of 10-17 to 10-15 cm2s-1 between 540 and 590 αC. Surface evaporation of Te was observed at all heat treatments. Pd diffusion was not observed in this study, most likely due to limited solubility of Pd and formation of metal precipitates.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 257: Symposium – Scientific Basis for Nuclear Waste Management XV , 1991 , 183
Copyright
Copyright © Materials Research Society 1992

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References

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