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

Abstract

In order to reduce sintering temperature and prevent adverse dielectric effects, pure BaTiO 3 powder with the addition of Mn-Si-O glass was sintered in the temperature range of 1175-1300°C. Microstructural observation showed that BaTiO 3 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 BaTiO 3 grains are not found in the sintered samples. The microstructure and phase analysis showed that the dielectric properties, tetragonality, and grain growth of BaTiO 3 are closely controlled by the formation of the liquid phase, newly formed Ba 2 TiSi 2 O 8 grains, and Mn solid solution in BaTiO 3 grains.

Ferroelectric Glass-Ceramic Systems for Energy Storage Applications

“…At high glass concentrations, they observed the formation of Ba2TiSi2O8 and a Mn solid solution in BaTiO3 grains growing at the grain boundaries and inhibiting grain growth. Figure 16 shows the influence of glass content on the structural and dielectric parameters [86]. It can be observed, that the ceramics with grain sizes in the range of 0.7-1 μm have the higher relative permittivity.…”

“…Lin et al [86] added a manganese oxide-silica glass to pure BaTiO3 and reported the effect of the liquid phase on the dielectric and ferroelectric properties of the material. The addition of the Mn-Si-O glass enabled densification of the nanocrystalline powder at temperatures in the range 1175-1300°C.…”

Strategies to Improve the Energy Storage Properties of Perovskite Lead-Free Relaxor Ferroelectrics: A Review

“…Figure 5 b). This contributes to the reduction of the sintering temperature [ 89 ], an increase in ρ [ 90 ] and a refined grain size [ 91 ]. An ideal glass phase additive should possess the following: (1) low melting temperature to reduce the sintering temperature and to limit grain growth, (2) low reactivity with the solid phase to avoid the formation of secondary phases, (3) low viscosity to promote mobility for easy redistribution around the matrix phase grains, and (4) relatively high ε r [ 90 ].…”

Phase transition and energy storage properties of BaTiO3-modified Bi0.5(Na0.8K0.2)0.5TiO3 ceramics

“…Figure 5b). This contributes to the reduction of the sintering temperature [80], an increase in  [81] and a refined grain size [82]. An ideal glass phase additive should possess the following: (1) low melting temperature to reduce the sintering temperature and to limit grain growth, (2) low reactivity with the solid phase to avoid the formation of secondary phases, (3) low viscosity to promote mobility for easy redistribution around the matrix phase grains and (4) relatively high r [81].…”