The replacement of titanium by zirconium in ceramics for plutonium immobilization

M. W A Stewart, B. D. Begg, E. R. Vance, K. Finnie, H. Li, G. R. Lumpkin, K. L. Smith, W. J. Weber, S. Thevuthasan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

19 Citations (Scopus)

Abstract

Zirconates and titanates, based on the nominal baseline composition developed for the Plutonium Immobilization Project (PIP), have been prepared with and without process impurities. The titanates form pyrochlore as the major phase and the zirconates form a defect-fluorite. Little, if any, of each impurity is accommodated in the defect-fluorite and powellite, kimzeyite, a spinel and a silicate glass appear as extra phases in this ceramic. In the titanates the pyrochlore incorporates more impurities, with the remainder being accommodated in zirconolite and a small amount of silicate glass. At extremely high levels of impurities, traces of magnetoplumbite, perovskite, and loveringite were found. The defect-fluorite zirconate phase is more radiation damage resistant than the titanate pyrochlore, though the secondary phases in the zirconate will reduce the radiation damage resistance of zirconate monoliths. To produce a dense product the oxide-route zirconate required sintering temperatures of about 1550°C, 200°C higher than that required for the titanate. Silicate impurities reduce the sintering temperatures.

Original languageEnglish
Title of host publicationMaterials Research Society Symposium - Proceedings
EditorsB.P. McGrail, G.A. Cragnolino
Pages311-318
Number of pages8
Volume713
Publication statusPublished - 2002
Externally publishedYes
EventScientific Basis for Nuclear Waste Management XXV - Boston, MA, United States
Duration: 26 Nov 200129 Nov 2001

Other

OtherScientific Basis for Nuclear Waste Management XXV
CountryUnited States
CityBoston, MA
Period26/11/0129/11/01

Fingerprint

Plutonium
Titanium
Zirconium
Silicates
Impurities
Fluorspar
Radiation damage
Defects
Sintering
Glass
Perovskite
Oxides
Temperature
Chemical analysis
pyrochlore

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Stewart, M. W. A., Begg, B. D., Vance, E. R., Finnie, K., Li, H., Lumpkin, G. R., ... Thevuthasan, S. (2002). The replacement of titanium by zirconium in ceramics for plutonium immobilization. In B. P. McGrail, & G. A. Cragnolino (Eds.), Materials Research Society Symposium - Proceedings (Vol. 713, pp. 311-318)

The replacement of titanium by zirconium in ceramics for plutonium immobilization. / Stewart, M. W A; Begg, B. D.; Vance, E. R.; Finnie, K.; Li, H.; Lumpkin, G. R.; Smith, K. L.; Weber, W. J.; Thevuthasan, S.

Materials Research Society Symposium - Proceedings. ed. / B.P. McGrail; G.A. Cragnolino. Vol. 713 2002. p. 311-318.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Stewart, MWA, Begg, BD, Vance, ER, Finnie, K, Li, H, Lumpkin, GR, Smith, KL, Weber, WJ & Thevuthasan, S 2002, The replacement of titanium by zirconium in ceramics for plutonium immobilization. in BP McGrail & GA Cragnolino (eds), Materials Research Society Symposium - Proceedings. vol. 713, pp. 311-318, Scientific Basis for Nuclear Waste Management XXV, Boston, MA, United States, 26/11/01.
Stewart MWA, Begg BD, Vance ER, Finnie K, Li H, Lumpkin GR et al. The replacement of titanium by zirconium in ceramics for plutonium immobilization. In McGrail BP, Cragnolino GA, editors, Materials Research Society Symposium - Proceedings. Vol. 713. 2002. p. 311-318
Stewart, M. W A ; Begg, B. D. ; Vance, E. R. ; Finnie, K. ; Li, H. ; Lumpkin, G. R. ; Smith, K. L. ; Weber, W. J. ; Thevuthasan, S. / The replacement of titanium by zirconium in ceramics for plutonium immobilization. Materials Research Society Symposium - Proceedings. editor / B.P. McGrail ; G.A. Cragnolino. Vol. 713 2002. pp. 311-318
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