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.

中文翻译：

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估计刚玉颗粒尺寸和形状对多孔陶瓷毛细管半径的影响

提出了一种基于颗粒的几何形状因数和比表面积来估计电刚玉粉末颗粒的尺寸和形状对电刚玉陶瓷多孔结构的平均毛细管半径的影响的方法。该程序基于材料的多孔结构的三维模型，其中考虑了毛细管的几何形状。平均毛细血管半径的表达式要比Kozeny的关系和基于不相交毛细血管的模型的方法准确得多，该模型低估了半径。注意，多孔陶瓷样品的厚度对气体渗透率的影响很小。