Steklo i Keramika (Glass and Ceramics). Monthly scientific, technical and industrial journal

 

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Research Black Core and Bloating During Firing of Porcelain

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Autors: Moshnyakov M. G., Аbdrakhimov V. Z.
  • Continuous numbering: 1099
  • Pages: 37-41
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Heading: At the enterprises and institutes

One of the reasons for the relatively low quality of dense ceramic materials (porcelain stoneware, facade tiles and floor tiles) due to the appearance of a black core is the presence of unburned coal particles in them, which remain in the products after firing due to poorly selected compositions and heat treatment regime. Studies have shown that the largest mass content of C (carbon) in relation to other layers of porcelain stoneware is in the black porous core (9.68 & # 37;). The appearance of a black core is explained by the fact that during heating, organic impurities are carbonized mainly in the inner layers of porcelain stoneware, isolated from the access of air oxygen. In addition, the formation of a black core will also be facilitated by a sintering process with the participation of a liquid phase, which will isolate the carbonaceous material from the air before it is completely oxidized.
M. G. MOSHNYAKOV 1 ( е-mail: This email address is being protected from spambots. You need JavaScript enabled to view it. ), Dr. Sciences V. Z. ABDRAKHIMOV 2 ( e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it. ); 1 Plant LLC & # 171; Samara Stroyfarfor & # 187; (Russia, Samara)
2 Samara State University of Economics (Russia, Samara)
Abdrakhimov V.Z. Ceramic building materials. Samara: Samarsk. state architect-build un-t, 2010.364 p. Abdrakhimova E.S., Abdrakhimov V.Z. Investigation of combustion processes during firing of heat-insulating material from technogenic raw materials from non-ferrous metallurgy and energy // Journal of Applied Chemistry. 2012. T. 85. 8, p. 1247? 1252. Suleimenov ST Physico-chemical processes of structure formation in building materials and mineral industrial waste. M .: Monuscript, 1996.298 p. Abdrakhimov V.Z., Roshchupkina I. Yu., Abdrakhimova E.S. Processes of carbon combustion during the firing of heat-insulating material from waste oil shale // Koks i Khimiya. 2012.? 11, p. 35? 41. Esin OA, Geld PV Physical chemistry of pyrometallurgical processes. Part 1. Reactions between gaseous and solid phases. Sverdlovsk: Metallurgy, 1962.671 p. Petrov V.P., Maksimov B.A. Mechanism and kinetics of combustion of coal particles in granules of porous aggregates // Current state and prospects for the development of building materials science: materials of the Eighth academic readings of the RAASN. SGASU. Samara, 2004.S. 407? 410. Tokarev SA, Petrov VP Kinetics of carbon combustion in granules during firing of alumina expanded clay in rotary kilns // Izvestiya vuzov. Construction. 2001.? 5.S. 20? 27. Pavlov VF Physical and chemical foundations of firing products of building ceramics. M: Stroyizdat, 1977.272 p. Pavlov, V.F., The role of iron oxide in the formation of the structure of acid-resistant porcelain, Tr. Institute of Research Institute of Construction Ceramics. Scientific research in the field of mechanization of technological processes, development of new compositions of masses and glazes. 1982.S. 48? 56. Dobuzhinsky VI New technology of ceramic tiles. Moscow: Stroyizdat, 1977.232 p.

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Keywords

porcelain stoneware, black core, bulging, firing processes, carbon

Use the reference below to cite the publication

Moshnyakov M. G., Аbdrakhimov V. Z. Research Black Core and Bloating During Firing of Porcelain. Steklo i keramika. 2019:92(7):37-41. (in Russ). UDK 691.666.591.69
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Lyudmila Vladimirovna Sokolova

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