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Sintered (Sr,U)-Containing Zirconolite Ceramics Study

Published online by Cambridge University Press:  10 February 2011

S.V. Stefanovsky ,
S.V. Ioudintsev ,
A.V. Ochkin ,
A.G. Ptashkin  and
S.V. Chizhevskaya
S.V. Stefanovsky
Affiliation:
SIA «RADON», 7th Rostovskii per., 2/14, Moscow 119121Russia
S.V. Ioudintsev
Affiliation:
Institute of Geology of Ore Deposits, Staromonetnii 35, Moscow 109017Russia
A.V. Ochkin
Affiliation:
D. Mendeleev University of Chemical Technology, Miusskaya 9, Moscow, Russia
A.G. Ptashkin
Affiliation:
D. Mendeleev University of Chemical Technology, Miusskaya 9, Moscow, Russia
S.V. Chizhevskaya
Affiliation:
D. Mendeleev University of Chemical Technology, Miusskaya 9, Moscow, Russia
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Abstract

Zirconolite-rich ceramics, containing strontium (∼1 wt.%) or uranium (5-20 wt.%) were prepared by cold pressing of mechanically activated oxide powders and sintering in air at 1200 TC for 2 hours. They were examined with XRD, optical and electron microscopy (SEM/TEM/EDS) methods. Zirconolite content in the samples was found to be as much as 85-90 vol.%, Baddeleyite, rutile, and perovskite (in the Sr-containing sample only) were present as minor phases. In the U-containing samples, two zirconolite varieties with different Zr/U ratio were found: zirconolite-1 and zirconolite-2 with average compositions Ca0.90Zr0.95U0.10Ti2.00O7.00, and Ca1.15Zr0.40U0.50Ti2.02O7.00 respectively. The amount of zirconolite-2 increases from ∼1 vol.% in the sample with the lowest uranium content to >50 vol.% in the sample containing ∼20 % U02. In the latter sample about 5 vol.% of cubic pyrochlore-type phase was also present.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 506: Symposium – Scientific Basis for Nuclear Waste Management XXI , 1997 , 261
Copyright
Copyright © Materials Research Society 1998

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References

REFERENCES

1 Vance, E.R. and Agrawal, D.K., Nuci. Chem. Waste Manag. 3, 229 (1982).Google Scholar
2 Vance, E.R., Ball, C.J., Day, R.A., Smith, K.L., Blackford, M.G., Begg, B.D., and Angel, P.J., J. Alloys and Comp., 213/214, 406 (1994).Google Scholar
3 Vance, E.R., Begg, B.D., Day, R.A., and Ball, C.J.., in Scientific Basis for Nuclear Waste Management XVIII, edited by Murakami, T. and Ewing, R.C. (Mat. Res. Soc. Proc. 353, Pittsburgh, PA, 1995), p. 767.Google Scholar
4 Vance, E.R., Jostsons, A., Day, R.A., Ball, C.J., Begg, B.D., and Angel, P.J., in Scientific Basis for Nuclear Waste Management XIX, edited by Murphy, W.M. and Knecht, D.A. (Mat. Res. Soc. Proc. 412, Pittsburgh, PA, 1995), p. 41.Google Scholar
5 Knyazev, O.A., Stefanovsky, S.V., Ioudintsev, S.V., Nikonov, B.S., Omelianenko, B.I., Mokhov, A.V., and Yakushev, A.I., in Scientific Basis for Nuclear Waste Management XX, edited by Gray, W.J. and Triay, I.R. (Mat. Res. Soc. Proc. 465, Pittsburgh, PA, 1997), p. 401.Google Scholar
6 Bayliss, P., Mazzi, F., Munno, R., and White, T., Mineral. Mag. 53, 565 (1989).Google Scholar
7 Smith, K. L. and Lumpkin, G.R., in Defects and Processes in the Solid State: Geoscience Application, edited by Boland, J.N. and Gerald, J.D. Fitz, Elsev. Sci. Publ., 1993, p.401.Google Scholar
8 Coelho, A.A., Cheary, R.W., and Smith, K.L., J. Sol. State Chem., 129, 345 (1997).Google Scholar
9 Fielding, P.E. and White, T.J., J. Mater. Res., 2, 387 (1987).Google Scholar