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Phase transformations during the synthesis and sintering of Y2 − x Yb x O3 nanopowders

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Abstract

The formation of an Y2O3-Yb2O3 solid solution (8 mol % Yb2O3) during the thermal decomposition of (Y,Yb)2(CO3)3 · 2H2O mixed carbonates obtained by coprecipitation from a nitrate solution has been studied by X-ray diffraction, thermal analysis, and optical microscopy. The results demonstrate that the formation of a cubic yttria-based solid solution begins in the range 470–500°C and reaches completion at temperatures above 1100°C. The unit-cell parameter a of the cubic solid solution and the X-ray density of the corresponding ceramic are 10.5910 Å and 5.349 g/cm3, which corresponds to the intended chemical composition of the isovalent substitutional solid solution: Y1.84Yb0.16O3.

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Authors and Affiliations

  1. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninskii pr. 49, Moscow, 119991, Russia

    G. B. Tel’nova, A. A. Konovalov, L. I. Shvorneva, S. V. Kutsev & K. A. Solntsev

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  1. G. B. Tel’nova
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  2. A. A. Konovalov
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  3. L. I. Shvorneva
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  4. S. V. Kutsev
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  5. K. A. Solntsev
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Correspondence to G. B. Tel’nova.

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Original Russian Text © G.B. Tel’nova, A.A. Konovalov, L.I. Shvorneva, S.V. Kutsev, K.A. Solntsev, 2011, published in Neorganicheskie Materialy, 2011, Vol. 47, No. 4, pp. 445–451.

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Tel’nova, G.B., Konovalov, A.A., Shvorneva, L.I. et al. Phase transformations during the synthesis and sintering of Y2 − x Yb x O3 nanopowders. Inorg Mater 47, 390–395 (2011). https://doi.org/10.1134/S0020168511040194

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  • DOI: https://doi.org/10.1134/S0020168511040194

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