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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)

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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).

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Authors and Affiliations

  1. SIA Radon, 119121, Moscow, Russian Federation

    Natalia Mikhailenko

  2. Center of Advanced Technologies, SIA Radon, 7th Rostovskii lane 2/14, 119121, Moscow, Russian Federation

    Sergey Stefanovsky

  3. D. Mendeleev University of Chemical Technology, Moscow, Russian Federation

    Alexander Ochkin

Authors
  1. Natalia Mikhailenko
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  2. Sergey Stefanovsky
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  3. Alexander Ochkin
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Mikhailenko, N., Stefanovsky, S. & Ochkin, A. Phase Relations and Elemental Distribution Among Co-Existing Phases in the Ceramics of the Pseudobinary System CaZrTi2O7-LnAlO3 (Ln= Nd, Sm). MRS Online Proceedings Library 985, 1104 (2006). https://doi.org/10.1557/PROC-985-0985-NN11-04

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  • DOI: https://doi.org/10.1557/PROC-985-0985-NN11-04

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