Structure-hardness relation for high-temperature SO2-dealkalized float glass

摘要

Changes in the surface mechanical properties of float glass that had been heat treated in atmospheres containing SO2 gas were measured. An analysis combining dynamic microhardness and structure investigations indicates that a relation exists between the hardness and surface structure. This relation is used in establishing an understanding of the microhardness variations and the corresponding surface mechanical properties. The treatment parameters, temperature, time and treatment atmosphere conditions, are shown to have an effect on these properties. Their extent is suggested to depend on the formation of a thermal expansion coefficient difference between a dealkalized surface and the interior dealkalization properties and structure alterations. The changes in the mechanical properties are described which connect these effects. The structure-hardness relation of the air side differs from the tin side of float glass. (C) 1997 Elsevier Science B.V.