Transactions of the INDIAN CERAMIC SOCIETY Vol. 44 1985
Studies on the Effect of Minor Glass Additives
on the Sintering and Dielectric Properties
of Barium Titanate
A. N. VIRKAR AND s. K. SUNDARAM
Pages : 71-74
DOI : 10.1080/0371750X.1985.10822744
Abstract
The sintering temperature of barium titanate was reduced to llOOC
by using low melting glasses like Ba0-820 3 and highly polarizable
glasses like Bi20 3-B20s and Pb0-820 3 which were added in BaTi03
up to a maximum of 10 wt%. Addition of low melting glass powder
accelerated densification by liquid phase sintering. Sintering kinetics
have been followed through the density data. Higher density and
dielectric constant were obtained for BaTi03 containing Ba0-820 3
glass, sintered at 1100°C, than those observed for pure BaTi03
sintered at 1300°C for the same duration. Even though the sintering
temperature of BaTiOs was reduced by 200°C by addition of Ba0-
8,03 glass, its dielectric properties were found to be better. A decrease
in density and hence decrease in dielectric constant at higher
glass content might be the result of trapped gases and excess vitreous
phase.
