Study of PbO - TiO2 - B2O3 Glass and Glass Ceramics.

Glass samples with composition (35 - X) B2O3 - (40 + X) PbO - 25 TiO2 (where X = 0, 2.5, 5, 7.5 and 10 mol %) were prepared using conventional quenching technique. It was observed that as PbO content increases the value of Tcand Tc decreases. These glass samples were converted to glass ceramics by following two stage heat treatment schedule. The density values of glass ceramic samples are higher than those of corresponding glass samples. It was observed that there was good correlation between the density and CTE results of the glass-ceramics. The XRD results revealed the formation of tetragonal lead titanate as a major crystalline phase in the glass ceramics. The dielectric constant of glass ceramic samples is higher than those of corresponding glasses [ABSTRACT FROM AUTHOR]