Effects of BaO–B2O3–SiO2 glass additive on densification and dielectric properties of BaTiO3 ceramics

Abstract: Effects of BaO–B2O3–SiO2 glass additive on densification and dielectric properties of BaTiO3 ceramics started from hydrothermally synthesized nano-sized BaTiO3 powders (∼60nm) were investigated. Addition of an optimal amount of the BaO–B2O3–SiO2 glass to BaTiO3 compacts accelerated densification with a limited grain growth. The sintering temperature of the BaTiO3 ceramics was lowered to 900°C with high density above 93%. Furthermore, there was no formation of secondary phases in the sintered bodies at the optimal amount of the glass. Higher dielectric constant was obtained from the BaTiO3 ceramics with 1wt% BaO–B2O3–SiO2 glass, sintered at 900°C, than those observed for the pure BaTiO3 sintered at 1350°C. [Copyright &y& Elsevier]