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Short-range and long-range aggregation of particles in the γ-Al2O3 sol: II. Photometric and ultramicroscopic investigation of the aggregate stability of the positively charged γ-Al2O3 sol

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Abstract

The aggregate stability of the positively charged γ-Al2O3 (alundum) sol has been investigated using photometry and flow ultramicroscopy over a wide range of KCl concentrations. The data on the sol stability have been compared with the results of the calculations in the framework of the extended Derjaguin-Landau-Verwey-Overbeek theory. The parameters of the long-range structural forces for γ-Al2O3 particles have been evaluated. The role of the far potential minimum in the sol stability has been discussed.

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Authors and Affiliations

  1. Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences, nab. Admirala Makarova 2, St. Petersburg, 199034, Russia

    E. V. Golikova & L. L. Zagorskaya

  2. St. Petersburg State Polytechnical University, Politekhnicheskaya ul. 29, St. Petersburg, 195251, Russia

    L. M. Molodkina

  3. OOO Incrom, ul. Babushkina 36/1, St. Petersburg, 192171, Russia

    E. A. Garibin

Authors
  1. E. V. Golikova
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  2. L. M. Molodkina
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  3. L. L. Zagorskaya
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  4. E. A. Garibin
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Correspondence to E. V. Golikova.

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Original Russian Text © E.V. Golikova, L.M. Molodkina, L.L. Zagorskaya, E.A. Garibin, 2010, published in Fizika i Khimiya Stekla.

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Golikova, E.V., Molodkina, L.M., Zagorskaya, L.L. et al. Short-range and long-range aggregation of particles in the γ-Al2O3 sol: II. Photometric and ultramicroscopic investigation of the aggregate stability of the positively charged γ-Al2O3 sol. Glass Phys Chem 36, 598–608 (2010). https://doi.org/10.1134/S1087659610050093

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