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The diffusion of Te and Pd was measured in the German waste glass VG 98/12 using ion implantation to introduce these elements and the Rutherford backscattering method to measure their diffusion. Both elements tend to precipitate during the manufacture of nuclear 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 1.0 E-17 to 1.0 E-15 cm2/s between 540 and 590 C. Surface evaporation of Te was observed during all heat treatments. Pd diffusion was not observed in this study, most likely due to the limited solubility of Pd and the formation of metal precipitates.

Additional information

Authors: YAMASHITA M, JRC Karlsruhe (DE);MATZKE H-J, JRC Karlsruhe (DE);LINKER G, Kernforschungszentrum Karlsruhe, Institut für Nukleare Festkörperphysik, Karlsruhe (DE)
Bibliographic Reference: Paper presented: 15th International Symposium on the Scientific Basis for Nuclear Waste Management, Strasbourg (FR), Nov. 5-8, 1991
Availability: Available from (1) as Paper EN 36380 ORA
Record Number: 199111352 / Last updated on: 1994-12-02
Original language: en
Available languages: en