devitrified glass produced by the controlled, catalyzed crystallization of glass made from metallurgical, furnace, and other slags or from mineral and synthetic raw materials. Nucleation and growth of crystals of the major crystalline phases on the nuclei occur simultaneously throughout the glass during heat treatment. Slag sitalls consist of tiny crystals with lengths from fractions of a micrometer to several micrometers in combination with residual vitreous glass (less than 40 percent by volume). They have high chemical resistance and resistance to wear. Slag sitalls were first synthesized in 1959 as a result of joint investigations by the Avtosteklo Factory in Konstantinovka, Donetsk Oblast, and the Mendeleev Moscow Institute of Chemical Engineering.
Slag sitalls are produced as continuous ribbons and pressed plates. They are white or gray and may be coated with colored ceramic dyes. Articles made of slag sitalls are used in construction, the chemical industry, and mining to protect structures and equipment from corrosion and abrasive wear. Slag sitalls are also used for floor coverings and exterior and interior wall facings.
REFERENCEShlakositally vstroitel’stve. Moscow, 1972.
K. T. BONDAREV