Mechanism of structural ordering of monodisperse spherical silica particles in concentrated alcohol suspensions |
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| Authors: | V. V. Serdobintseva D. V. Kalinin A. F. Danilyuk |
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| Affiliation: | (1) Institute of Mineralogy and Petrography, 630090 Novosibirsk, Russia;(2) Boreskov Institute of Catalysis, 630090 Novosibirsk, Russia |
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| Abstract: | Structural ordering of monodispersed spherical silica particles (MSSP) occurs in ammonia stabilized concentrated suspensions obtained by tetraethoxysilane (TEOS) hydrolysis in alcohol-aqueous solutions in the ammonia concentration range from 0.0001 to 0.0008 mol/L. MSSP interaction follows the DLFO (Deryagin, Landau, Ferway, and Overbeck) mechanism when electrostatic repulsive forces between the particles predominate, and the structural ordering requires straightened conditions, which are provided by suspension concentrating through MSSP gravitational precipitation. |
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| Keywords: | Amorphous silica spherical particles regular structures |
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