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Effect of Precipitation pH and Heat Treatment on the Properties of Hydrous Zirconium Dioxide

  • Synthesis and Properties of Inorganic Compounds
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Abstract

The effect of the precipitation pH and subsequent heat treatment is studied on the properties of hydrous zirconium dioxide precipitated by ammonia from nitrate solutions. Precipitation at pH ≤ 6 generates hydrous zirconium dioxide, which contains excess sorbate nitrate ions; the product precipitated at pH ≥ 7 contains excess ammonium ions. This distinction considerably affects the course of thermolysis and the morphology of products. The exotherm associated with the formation of the crystal structure of zirconia becomes more pronounced with rising precipitation pH. In addition, the samples prepared at pH ≥ 7 have a more developed surface. The morphologic and microstructural evolution of hydrous zirconium dioxide samples during thermolysis is described.

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Authors and Affiliations

  1. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119991, Russia

    I. A. Stenina, E. Yu. Voropaeva & A. B. Yaroslavtsev

  2. Chemistry Department, Moscow State University, Vorob’evy gory, Moscow, 119992, Russia

    A. G. Veresov

  3. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninskii pr. 47, Moscow, 119991, Russia

    G. I. Kapustin

Authors
  1. I. A. Stenina
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  2. E. Yu. Voropaeva
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  3. A. G. Veresov
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  4. G. I. Kapustin
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  5. A. B. Yaroslavtsev
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Stenina, I.A., Voropaeva, E.Y., Veresov, A.G. et al. Effect of Precipitation pH and Heat Treatment on the Properties of Hydrous Zirconium Dioxide. Russ. J. Inorg. Chem. 53, 350–356 (2008). https://doi.org/10.1134/S0036023608030029

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  • DOI: https://doi.org/10.1134/S0036023608030029

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