The influence of structural-dimensional parameters of α-Al<sub>2</sub>O<sub>3</sub> filler on the morphology and properties of porous ceramic materials

Highly porous ceramic materials based on α-Al 2 O 3 powders with various characteristic particle sizes from 25 to 250 μm were synthesized by energy-efficient combination of compaction methods and thermochemical synthesis with the participation of ultrafine active binders. The porosity of materials has been established to be from 30 to 50 %, while the pore sizes decrease linearly and accordingly to the decrease in the sizes of characteristic filler particles. The dependence of the decrease in liquid permeability on the decrease in pore size is almost quadratic, and the decrease in gas permeability is close to it. The dependences of the characteristics of the pore space and the properties of ceramic materials on the morphology of the initial components have been revealed, which opens up the possibility of effectively predicting and ensuring the structural and dimensional parameters of membranes based on them when creating functional heatresistant ceramics with high open porosity for filtration or catalysis processes.