A method is proposed for estimating the influence of the size and shape of electrocorundum powder particles on the average capillary radius of the porous structure of electrocorundum ceramic on the basis of the geometric form factor and specific surface area of the particles. The procedure is based on a three-dimensional model of the porous structure of materials where the geometry of the capillaries is taken into account. The expression obtained for the average capillary radius is significantly more accurate than Kozeny’s relation and methods based on a model with non-intersecting capillaries, which understate the radius. It is noted that the effect of the thickness of porous ceramic samples on the gas permeability is very small.
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B. L. Krasnyi, V. P. Tarasovskii, A. B. Krasnyi, and A. M. Uss, “Influence of the size and shape of crystals of electrofused corundum on the microstructure and permeability of porous ceramics,” Novye Ogneupory, No. 12, 20 – 24 (2009).
Yu. N. Kryuchkov, Influence of the form shape of porous ceramic materials on percolation thresholds,” Ogneup. Tekh. Keram., No. 6, 16 – 21 (2015).
S. V. Belov (ed.), Handbook of Porous Permeable Materials [in Russian], Metallurgiya, Moscow (1987).
V. V. Guryev, V. I. Nikitsin, and V. A. Kofanov, “Determination of the hydraulic radius of the porous structure of ceramic materials,” Steklo Keram., No. 7, 25 – 34 (2016); V. V. Guryev, V. I. Nikitsin, and V. A. Kofanov, “Determination of the hydraulic radius of the porous structure of ceramic materials,” Glass Ceram., 73(7 – 8), 258 – 265 (2016).
Yu. N. Kryuchkov, “Determination of the average capillary radius of porous materials,” Steklo Keram., No. 4, 16 – 21 (2018); Yu. N. Kryuchkov, “Determination of the average capillary radius of porous materials,” Glass Ceram., 75(3 – 4), 139 – 144 (2018).
Yu. N. Kryuchkov, Structure and Properties of Heterogeneous Porous, Composite Materials, LAP Lambert Verlag, Academic Publishing (2011).
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Translated from Steklo i Keramika, No. 1, pp. 25 – 28, January, 2020.
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Kryuchkov, Y.N. Estimation of Corundum Particles Size and Shape Effect on the Capillary Radius of Porous Ceramic. Glass Ceram 77, 22–25 (2020). https://doi.org/10.1007/s10717-020-00230-7
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DOI: https://doi.org/10.1007/s10717-020-00230-7