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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:
profstef@mtu-net.ru, 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:
profstef@mtu-net.ru, SIA Radon, Center of Advanced Technologies, 7th Rostovskii lane 2/14, Mosco w, 119121, Russian Federation
Alexander Ochkin
Affiliation:
ochkin@rctu.ru, D.Mendeleev University of Chemical Technology, Moscow, N/A, Russian Federation
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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

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References

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