Sintering behavior and dielectric properties of BaTiO_3 ceramics with glass addition for internal capacitor of LTCC

摘要

The addition effects of ZnO-B_2O_3-SiO_2 (ZBS) glass on both the sintering behavior and dielectric properties of BaTiO_3 were investigated in developing low-temperature-fired BaTiO_3-based ceramics for LTCC devices. X-ray diffractometer (XRD), scanning electron microscopy (SEM), and a dilatometer were used to examine the effect of ZBS glass on BaTiO_3 densification and the chemical reaction between the glass and BaTiO_3. The results indicate that ZBS glass can be used as a sintering aid to reduce the sintering temperature of BaTiO_3 from 1300 to 900 deg C without secondary phase formation. The dielectric properties of BaTiO_3 with ZBS glass sintered at 900 deg C show a relative density of 95 percent, a high dielectric constant of 994, and a dielectric loss of 1.6 percent.