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Formation of ultradispersed systems based on sodium polyaluminates from thermal plasma flows

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Abstract

The process of synthesis of sodium β-alumina in a low-temperature nitric plasma is investigated. It is established that the main product of the plasmachemical reaction is sodium polyaluminate Na2O · nAl2O3 of an unknown structure, whose homogeneity range is within the interval of n = 3.5–8.0. The specifics of phase transformations in heating products of plasmachemical synthesis in the temperature interval of 600–1400°C are considered. The formation of the phase with the β-alumina structure (β-and β-Al2O3) proceeds in several stages with the formation of intermediate metastable sodium polyaluminates.

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Authors and Affiliations

  1. Institute of Physicochemical Problems of Ceramic Materials, Russian Academy of Sciences, Moscow, Russia

    G. B. Tel’nova & Ya. P. Grabis

  2. Institute of Inorganic Chemistry of the Academy of Sciences of Latvia, Riga, Latvia

    G. B. Tel’nova & Ya. P. Grabis

Authors
  1. G. B. Tel’nova
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  2. Ya. P. Grabis
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Translated from Steklo i Keramika, No. 11, pp. 9–13, November, 2005.

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Tel’nova, G.B., Grabis, Y.P. Formation of ultradispersed systems based on sodium polyaluminates from thermal plasma flows. Glass Ceram 62, 344–349 (2005). https://doi.org/10.1007/s10717-006-0003-2

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  • DOI: https://doi.org/10.1007/s10717-006-0003-2

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