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Synthesis, Characterization and Study of the Radiation Effects on Hollandite Ceramics Developed for Cesium Immobilization

Published online by Cambridge University Press:  01 February 2011

Virginie Aubin
Affiliation:
LCAES (UMR CNRS 7574), ENSCP, 11 rue P.M. Curie, 75231 Paris, France
Daniel Caurant
Affiliation:
LCAES (UMR CNRS 7574), ENSCP, 11 rue P.M. Curie, 75231 Paris, France
Didier Gourier
Affiliation:
LCAES (UMR CNRS 7574), ENSCP, 11 rue P.M. Curie, 75231 Paris, France
Noël Baffier
Affiliation:
LCAES (UMR CNRS 7574), ENSCP, 11 rue P.M. Curie, 75231 Paris, France
Thierry Advocat
Affiliation:
Commissariat à l'Energie Atomique, DEN/DIEC/SCDV, 30207 Bagnols-sur-Cèze, France
Florence Bart
Affiliation:
Commissariat à l'Energie Atomique, DEN/DIEC/SCDV, 30207 Bagnols-sur-Cèze, France
Gilles Leturcq
Affiliation:
Commissariat à l'Energie Atomique, DEN/DIEC/SCDV, 30207 Bagnols-sur-Cèze, France
Jean M. Costantini
Affiliation:
Commissariat à l'Energie Atomique, DEN/DMN/SRMA, 91191 Gif sur Yvette, France
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Abstract

Progress on separating the long-lived fission products has notably implied basic research on specific host matrices, especially for the immobilization of cesium. Barium hollandite (BaAl2Ti6O16) ceramics have received considerable interest because of their high cesium incorporation ability and chemical stability. This study deals with the preparation of hollandite in the BaxCsy(Al,Fe)2x+yTi8–2x-yO16 (x+y<2) compositional range by an oxide route. Different parameters such as the grain size of the precursor or the temperature and duration of sintering were changed in order to optimize ceramics synthesis. To estimate the hollandite radiation resistance, external electron irradiation experiments (simulating the β particles emitted by radioactive cesium) were performed on hollandite of simple composition. The irradiation-induced defects were studied by Electron Paramagnetic Resonance (EPR) spectroscopy and their nature is discussed.

Type
Research Article
Copyright
Copyright © Materials Research Society 2004

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References

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