Estimation of Corundum Particles Size and Shape Effect on the Capillary Radius of Porous Ceramic

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...

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Bibliographic Details
Published in:Glass and ceramics 2020-05, Vol.77 (1-2), p.22-25
Main Author: Kryuchkov, Yu. N.
Format: Article
Language:English
Subjects:
Aluminum oxide
Analysis
Capillaries
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Composites
Corundum
Form factors
Glass
Materials Science
Natural Materials
Permeability
Porous materials
Powders
Shape effects
Three dimensional models
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Summary: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.
ISSN:0361-7610
1573-8515
DOI:10.1007/s10717-020-00230-7