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Ion exchange adsorption processes on the surface of ammonium tungsten oxide bronze in aqueous media

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Abstract

A possible chemical model for the doping of tungsten metal was studied using technological blue oxide [(NH4) x WO3]. Applying potassium-42 and rubidium-86 radioactive isotopes as tracers Langmuir-Hückel type isotherms were determined. The constants of the isotherms led to conclusions on how the ion-exchange capacity of blue oxide and the solubility of the adsorbate varied as a function of composition of the solutions. The results show the conclusions that: (1) primarily the acidic protons of the OH-groups from the dissociative adsorption of water, and not the ions of the crystal lattice (NH +4 ) which can be exchanged for ions of the liquid phase, and consequently (2) there is a certain possibility for controlling the ratio of the adsorbed potassium-, aluminium-, and silicate-doping ions.[/p]

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Authors and Affiliations

  1. Institute of Physical Chemistry, Kossuth Lajos University, Debrecen, Hungary

    T. Szalay & A. Ludanyi

  2. Tungsram Research Laboratory, Budapest, Hungary

    B. A. Kiss

Authors
  1. T. Szalay
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  2. A. Ludanyi
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  3. B. A. Kiss
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Szalay, T., Ludanyi, A. & Kiss, B.A. Ion exchange adsorption processes on the surface of ammonium tungsten oxide bronze in aqueous media. J Mater Sci 22, 3543–3546 (1987). https://doi.org/10.1007/BF01161456

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  • DOI: https://doi.org/10.1007/BF01161456

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