Hostname: page-component-586b7cd67f-t7czq Total loading time: 0 Render date: 2024-11-23T15:03:11.271Z Has data issue: false hasContentIssue false
  • English
  • Français

Phase Relations and Elemental Distribution Among Co-Existing Phases in the Ceramics of the Pseudobinary System CaZrTi2O7-LnAlO3 (Ln= Nd, Sm)

Published online by Cambridge University Press:  19 October 2011

Sergey Stefanovsky ,
Sergey Stefanovsky  and
Alexander Ochkin
Sergey Stefanovsky
Affiliation:
[email protected], SIA Radon, Center of Advanced Technologies, 7th Rostovskii lane 2/14, Moscow, 119121, Russian Federation, 7 495 919 3194, 7 495 259 3739
Sergey Stefanovsky
Affiliation:
[email protected], SIA Radon, Center of Advanced Technologies, 7th Rostovskii lane 2/14, Mosco w, 119121, Russian Federation
Alexander Ochkin
Affiliation:
[email protected], D.Mendeleev University of Chemical Technology, Moscow, N/A, Russian Federation
Get access

Abstract

In the ceramics in series (1-õ) CaZrTi2O7 – x NdAlO3 and (1-õ) CaZrTi2O7 – x SmAlO3 (õ = 0.25, 0.5 and 0.75) produced by cold pressing and sintering at 1400, 1450 and 1500 0Ñ zirconolite was found to be a major phase, perovskite was an extra phase and traces of residual baddeleyite occurred. At x = 0.75 the perovskite was major phase and zirconolite and cubic oxide of fianite or tazheranite type were extra phases. Major Nd and Sm host phase at x = 0.25 was found to be zirconolite (about 65% of total Nd2O3 and 74% of total Sm2O3). With the x value increasing perovskite becomes major host phase for Nd and Sm accumulating of up to about 92% of total Nd and about 72% of total Sm. As follows from SEM/EDS data Nd and Sm contents in the zirconolite may reach ∼1 formula unit (fu).

Keywords

ceramicscanning electron microscopy (SEM)x-ray diffraction (XRD)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 985: Symposium NN – Scientific Basis for Nuclear Waste Management XXX , 2006 , 0985-NN11-04
Copyright
Copyright © Materials Research Society 2007

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Actinide and Fission Products Partitioning and Transmutation. Proceedings of the Vth International Information Exchange Meeting, Mol, Belgium, 25–27 November 1998. OECD, EUR 18898 EN. 1999.Google Scholar
2. Stefanovsky, S. V., Chizhevskaya, S. V., Mironov, A. S., Kirjanova, O. I., Yudintsev, S. V., Adv. Mater. (Russ.) [6] (2003) 61–68.Google Scholar
3. Vance, E. R., Ball, C. J., Day, R. A., Smith, K. L., Blackford, M. G., Begg, B. D., Angel, P. J., Journ. Alloys & Comps. 213/214 (1994) 406–409.Google Scholar
4. Loiseau, P., Caurant, D., Baffier, N., Fillet, C., Mat. Res. Soc. Symp. Proc. 757 (2003) 243–250.Google Scholar
5. Kesson, S. E., Sinclair, W. J., Ringwood, A. E., Nucl. Chem. Waste Manag. 4 (1983) 259–265.Google Scholar
6. Ringwood, A. E., Kesson, S. E., Reeve, K. D., Levins, D. M., Ramm, E. J., Radioactive Waste Forms for the Future, eds. Lutze, W. and Ewing, R. C., 1988. P. 233–334.Google Scholar
7. Lumpkin, G. R., Smith, K. L., Blackford, M. G., J. Nucl. Mater. 224 (1995) 31–42.Google Scholar
8. Gieré, R., Williams, C. T., Lumpkin, G. R., Schweiz. Mineral. Petrogr. Mitt. 78 (1998) 433–459.Google Scholar