Studied solid porous permeable ceramics obtained the selection of granular compositions filled with electrofusion corundum brands F600 (100-120 μm), F360 (40-60 μm) and F120 (10-20 μm). As the reinforcing binders, which was added in an amount of 3 and 5 wt. % in excess of 100%, applied fine powders of corundum (about 2 μm) doped with 0,25 wt. % MgO and a mixture of SiC powders (particle size 3-4 μm), and MgO (particle size1-2 μm) at a ratio of 2:1.Compositions of grainy mass prepared with different ratios of filler at fractions 10-20, 40-60 and 100-120 μm: 40/10/50 and 80/15/5. Samples were pressed by a pressure of 25 MPa and fired at 1450, 1500 and 1550 °С. The flexural strength of sintered samples varied from 5,7 to 36 MPa, open porosity - from 28,5 to 43,7%, and the gas permeability coefficient for compositions with a binder of systems SiC-MgO (2:1) - from 0,93 to 1,7 μm2 and binder of Al2O3 (MgO) - 1,62 to 0,9 μm2. The resulting perspective ceramics for use as filters and membranes of ceramic substrates.
ceramics, open porosity, strength, grainy powders, electrofusion corundum, ceramic filters, gas permeability
1. Berkman A. S. Poristaya pronicaemaya keramika. - M.: Stroyizdat, 1969. - 170 s.
2. Feng H., Zhaoxiang H. High gas permeability of SiC porous ceramics reinforced by mullitebibers // Journal of the European Ceramic Society. - 2016. - Vol. 36, № 16. - P. 3909-3917.
3. Bruno G., Pozdnyakova I., Efremov A. M. [et al.] Thermal and mechanical response of industrial porous ceramics // Mater. Sci. Forum. - 2010. - Vol. 652. - P. 191-196.
4. Guzman I. Ya. Vysokoogneupornaya poristaya keramika. - M.: Metallurgiya, 1971. - 283 s.
5. Praktikum po himicheskoy tehnologii keramiki: ucheb. posobie dlya vuzov / N. T. Andrianov, V. L. Balkevich, A. V. Belyakov [i dr.]; pod red. I. Ya. Guzmana. - M.: OOO RIF «Stroymaterialy», 2005. - 336 s.
6. Belyakov A. V., Bakunov V. S. Evolyuciya struktury v peredelah tehnologii keramiki // Novye ogneupory. - 2006. - № 1. - S. 56-61.
7. Belyakov A. V., Bakunov V. S. Evolyuciya struktury v peredelah tehnologii keramiki // Novye ogneupory. - 2006. - № 2. - S. 55-62.
8. Guzman I. Ya., Sysoev E. P. Tehnologiya poristyh keramicheskih materialov i izdeliy. - Tula: Priokskoe kn. izd-vo, 1975. - 196 s.
9. Poristaya prochnaya keramika na osnove oksida alyuminiya / E. M. Tomilina, O. V. Pronina, E. S. Lukin [i dr.] // Steklo i keramika. - 2000. - № 6. - S. 23-24.
