Investigation of physical and mechanical properties of zirconium-containing ceramics with increased thermal and chemical resistance
Abstract
Investigation of physical and mechanical properties of zirconium-containing ceramics with increased thermal and chemical resistance
Incoming article date: 09.02.2023The paper presents the results of a study conducted for chemically and thermally resistant ceramics obtained from low-plastic clay using boric acid as a melt, zirconium oxide and galvanic sludge as functional additives. The studied ceramics were obtained by semi-dry pressing technology at a maximum firing temperature of 1050 оC. The dependences of the physical and mechanical properties of ceramics on the content of zirconium oxide and galvanic sludge in the charge are established. Zirconium oxide promotes liquid-phase sintering, compaction and strength enhancement, and galvanic sludge exhibits a pore-forming effect due to calcium carbonate and heavy metal hydroxides in its composition. At the same time, the effect of galvanic sludge on the physical and mechanical properties is lower than that of zirconium oxide. The quantities of the studied additives have been established, which make it possible to obtain high values of operational properties and apply the resulting ceramics in the production of lining and other ceramic products for special purposes.
Keywords: heat-resistant ceramics, acid-resistant ceramics, self-glazing, low-plastic clay, galvanic sludge, zirconium oxide, boric acid