Conclusions
On the basis of aqueous suspensions of vitreous silica and kaolin which have, respectively, a dilatant and thixotropic type of flow, we have studied the effect of a grainy filler on the rheological properties of the materials.
For the same volume concentration, the suspensions with the grainy filler had a lower viscosity and less anomalous flow than the unfilled, finely dispersed suspensions as a result of the increased concentration of kinetically free liquid.
The addition of a grainy filler to the vitreous silica suspensions intensifies their dilatant character while its addition to the kaolin suspensions enhances their thixotropic nature.
Equations are proposed for describing the dependence of the viscosity of the suspension-plus-filler on the volume concentration of filler and for calculating the ultimate permissible concentration of filler in the suspension.
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Literature cited
Yu. E. Pivinskii, P. L. Mityakin, and N. N. Tentyuk, in: Discussion Themes for the Third All-Union Conference on the Use of Refractory Materials in Engineering [in Russian], Leningrad (1976), p. 171.
Yu. E. Pivinskii and A. G. Romashin, Silica Ceramics [in Russian], Metallurgiya, Moscow (1974).
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Additional information
Translated from Ogneupory, No. 12, pp. 39–44, December, 1978.
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Pivinskii, Y.E., Makarenkova, R.G. Effect of a grainy filler on the rheological properties of ceramic suspensions. Refractories 19, 774–779 (1978). https://doi.org/10.1007/BF01285719
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DOI: https://doi.org/10.1007/BF01285719