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During the manufacture of nuclear waste glasses, Pd and Te tend to precipitate, and the Te content of the precipitates depends on the annealing time. Using the German waste glass VG 98/12, which contains no waste oxides, RBS spectra of samples heat treated at a constant temperature in the range 540-590 C were measured. Diffusion coefficients were calculated from the changes observed in the depth profiles before and after heat treatment. The diffusion coefficients of Te samples were low and their activation energy (500 kJ/mol) was high. In the case of Pd, the RBS peaks showed a very slight tailing into the inside of the sample, which indicates a very low solubility of Pd in the glass of about 0.1 wt%. Reliable diffusion constants could not be measured.

Additional information

Authors: YAMASHITA M, Government Institute for Glass Research, Osaka (JP);MATZKE H-J, JRC Karlsruhe (DE): Kernforschungszentrum Karlsruhe (DE);LINKER G,
Bibliographic Reference: Paper presented: Annual Meeting of the Ceramic Society of Japan, Tokyo (JP), June 1991
Availability: Text not available
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