Hostname: page-component-cd9895bd7-7cvxr Total loading time: 0 Render date: 2024-12-27T01:51:26.242Z Has data issue: false hasContentIssue false
  • English
  • Français

XRD, SEM and TEM Study of the Gd-Doped Zirconolites

Published online by Cambridge University Press:  21 March 2011

Sergey V. Stefanovsky ,
Albert Y. Troole ,
Maria I. Lapina ,
Boris S. Nikonov ,
Anatoliy V. Sivtsov  and
Sergey V. Yudintsev
Sergey V. Stefanovsky
Affiliation:
SIA “Radon” 7th Rostovskii per. 2/14, Moscow 119121 RUSSIA, [email protected]
Albert Y. Troole
Affiliation:
SIA “Radon” 7th Rostovskii per. 2/14, Moscow 119121 RUSSIA, [email protected]
Maria I. Lapina
Affiliation:
Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry, RAS, Staromonetnii 35, Moscow 109017, Russia.
Boris S. Nikonov
Affiliation:
Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry, RAS, Staromonetnii 35, Moscow 109017, Russia.
Anatoliy V. Sivtsov
Affiliation:
Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry, RAS, Staromonetnii 35, Moscow 109017, Russia.
Sergey V. Yudintsev
Affiliation:
Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry, RAS, Staromonetnii 35, Moscow 109017, Russia.
Get access

Abstract

Ceramic samples with formulations Ca1-xGdxZrTi2-xAlxO7(0 ≤ x ≤1) were prepared by cold pressing in pellets at 200 MPa followed by their sintering at either 1400 or 1500 °C for 5 hours. All the samples produced were single phase with rare grains of cubic zirconia based solid solution in the samples with high Gd and Al contents (x = 0.9 and 1.0). The samples produced at 1500 °C were more homogeneous and less porous than the samples sintered at 1400 °C. From SEM/EDS data average compositions of zirconolite in the samples are very close to specified formulation (within experimental error), for example, the zirconolite formula in the ceramic with x = 1 was found to be Gd1.04Zr1.02Ti1.07Al0.85O7. XRD and TEM patterns showed monoclinic (2M) structure for zirconolites, which transforms to higher symmetry modification within 0 ≤ x ≤ 0.5 compositional range. Zirconolite with high Gd content x →1 forms two varieties with trigonal and orthorhombic structure.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 713: Symposium JJ – Scientific Basis for Nuclear Waste Management XXV , 2002 , JJ11.14
Copyright
Copyright © Materials Research Society 2002

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. Vance, E.R., Begg, B.D., Day, R.A., Ball, C.J., Mat. Res. Soc. Symp. Proc. 333, 767 (1995).Google Scholar
2. Vance, E.R., A. Jostsons, Day, R.A., Ball, C.J., Begg, B.D., Angel, P.J., Mat. Res. Soc. Symp. Proc. 412, 41 (1996).Google Scholar
3. Laverov, N.P., Omelianenko, B.I., Yudintsev, S.V., Geol. Ore Dep. (Russ.) 38, 387 (1996).Google Scholar
4. Begg, B.D., Vance, E.R., Day, R.A.et. al., Mat. Res. Soc. Symp. Proc. 465, 325 (1997).Google Scholar
5. Chizhevskaya, S.V., Stefanovsky, S.V., in Plutonium Futures - The Science. Conf. Trans. Santa Fe. AIP Conf. Proc. 532, 2000, pp.148–150.Google Scholar
6. Stefanovsky, S.V., Yudintsev, S.V., Nikonov, B.S., Mat. Res. Soc. Symp. Proc. 608, 407 (2000).Google Scholar
7. Vance, E.R., Carter, M.L., Begg, B.D., Day, R.A., Leung, S.H.F., Mat. Res. Soc. Symp. Proc. 608, 431 (2000).Google Scholar
8. Vance, E.R., Ball, C.J., Day, R.A.et. al. J. Alloy Comp. 213/214, 406 (1994).Google Scholar
9. Kapustin, Y.L., Chernitsova, N.M., Pudovkina, Z.M., in Minerals and Paragenesis of Rock Minerals (Russ.: Nauka, Leningrad, 1973) pp.17–25.Google Scholar
10. White, T., Amer. Miner. 69, 1156 (1984).Google Scholar
11. Smith, K.L., Lumpkin, G.R., in Defects and Processes in the Solid State: Geoscience Applications, edited by Boland, J.N. and Gerald, J.D. Fitz (Elsevier, 1993) pp.401–422.Google Scholar
12. Coelho, A.A., Cheary, R.W., Smith, K.L., J. Solid State Chem. 129, 346 (1997).Google Scholar