Low-temperature sintering of BaTiO3 with Mn-Si-O glass

Abstract

In order to reduce sintering temperature and prevent adverse dielectric effects, pure BaTiO3 powder with the addition of Mn-Si-O glass was sintered in the temperature range of 1175–1300°C. Microstructural observation showed that BaTiO3 grains of the sintered samples only grew from the initial 400 nm to an average of 430 nm between 1175–1275°C for 1 h, or sintered at 1250°C as long as 27 h. Abnormal BaTiO3 grains are not found in the sintered samples. The microstructure and phase analysis showed that the dielectric properties, tetragonality, and grain growth of BaTiO3 are closely controlled by the formation of the liquid phase, newly formed Ba2TiSi2O8 grains, and Mn solid solution in BaTiO3 grains.