Hot-pressed phosphate glass-ceramic matrix composites containing calcium phosphate particles for nuclear waste encapsulation

Michie EM, Grimes RW, Boccaccini AR (2008)

Publication Type: Journal article

Publication year: 2008

Journal

Journal of Materials Science Springer Verlag (Germany)

Publisher: Springer Verlag (Germany)

Pages Range: 4152-4156

Journal Issue: 43

DOI: 10.1007/s10853-007-2232-3

Abstract

Sodium aluminium phosphate (NaAlP) glass-ceramic composites were produced as potential wasteforms for the immobilization of special categories of halide-containing radioactive waste. Sintering conditions for encapsulating a simulated waste (a calcinated mixture of calcium phosphate host and various oxides) in the cold-pressed NaAlP glass-ceramic were first determined and the results were compared with similar samples prepared by hot pressing. In both cases, the conditions aimed to provide a very high-density material, via as low production temperatures as possible, in conjunction with a high waste loading (75 wt.% simulated waste to 25 wt.% glass). It was found that by hot pressing and using a NaAlP glass-ceramic containing 2 mol% B2O3, significantly lower temperatures could be employed compared to the cold pressing and sintering route. The lowest temperature at which a sufficiently dense hot-pressed product was achieved (86% theoretical density), that exhibited mechanical properties similar to those of borosilicate glass (e.g. Young's modulus 67 ± 2 GPa), was 550 °C. This processing temperature is considerably lower than values reported in the literature for similar systems. As such, hot pressing can be considered as a convenient technique for the fabrication of this type of composite for waste encapsulation. © 2008 Springer Science+Business Media, LLC.

Authors with CRIS profile

Aldo Boccaccini Lehrstuhl für Werkstoffwissenschaften (Biomaterialien)

Involved external institutions

Imperial College London / The Imperial College of Science, Technology and Medicine GB United Kingdom (GB)

How to cite

APA:

Michie, E.M., Grimes, R.W., & Boccaccini, A.R. (2008). Hot-pressed phosphate glass-ceramic matrix composites containing calcium phosphate particles for nuclear waste encapsulation. Journal of Materials Science, 43, 4152-4156. https://doi.org/10.1007/s10853-007-2232-3

MLA:

Michie, E. M., R. W. Grimes, and Aldo R. Boccaccini. "Hot-pressed phosphate glass-ceramic matrix composites containing calcium phosphate particles for nuclear waste encapsulation." Journal of Materials Science 43 (2008): 4152-4156.

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