Technological peculiarities of ceramic material production on the basis of phosphate bonding

The complex and energy-consuming technological processes involved in the production of construction ceramics and fireproof materials promote a search for new ways of their production. The technological peculiarities of producing non-baked ceramic materials are described, as shown in silicon nitride compositions with phosphate binders (PB), and also by the use of aluminosilicate raw material, alumina and zirconia, silicon carbide, and other powder components. The kinetics of hardening and structure forming in the silicon nitride-PB system at different heating temperatures for the binder P 2 O 5 and changing strength of the samples has been researched. The physicochemical processes operating during heating in the above mentioned system have been studied. It has been shown that the structure-forming process in the silicon nitride-PB system (additives included) depends on the moulding process, the type and the quantity of PB, the dispersion of powders, and the degree of their chemical activity. Analogous criteria are characteristic for other systems. The article highlights the technological peculiarities of producing ceramic materials with the use of PB that determine the ways of moulding articles depending on the tasks connected with development and design of new materials. Certain properties and areas of use are given.