Effects of SrO–B2O3–SiO2 glass additive on densification and energy storage properties of Ba0.4Sr0.6TiO3 ceramics

Abstract

SrO-B 2 O 3 -SiO 2 glass powders were prepared and employed as sintering aids to reduce the sintering temperature of Ba 0.4 Sr 0.6 TiO 3 ceramics. The effects of glass content and sintering temperature on the densification, dielectric properties and energy storage properties of Ba 0.4 Sr 0.6 TiO 3 ceramics have been investigated. The relative density characterization results indicate that densification of Ba 0.4 Sr 0.6 TiO 3 ceramics with glass content becomes apparently from sintering temperature of 1,060°C. XRD results show all Ba 0.4 Sr 0.6 TiO 3 ceramics exhibit a perovskite structure without the formation of a secondary phase. The dielectric constant and dielectric loss decreased gradually with increasing glass content. The relationship between dielectric constant and breakdown strength was discussed using the thermochemical model. A discharged energy density of 0.44 J/cm 3 with an energy efficiency of 67.4% was achieved for Ba 0.4 Sr 0.6 TiO 3 ceramic with 2.0 wt% glass addition sintered at 1,180°C.

Dielectric behavior of perovskite glass ceramics

“…The discharged energy density of BST increases with increasing the glass content. Its value is reported to be 0.44 J/cm 3 having energy efficiency of 67.4 % for Ba 0.4 Sr 0.6 TiO 3 ceramic with 2.0 wt% glass addition and sintered at 1,180°C [148]. The BDS of BST is significantly enhanced by addition of La 2 O 3 .…”

Optimization of energy storage density and efficiency in BaxSr1-xTiO3 (x≤0.4) paraelectric ceramics

“…High efficiency means low energy loss during charge-discharge process for the capacitors[8]. Previous works mainly focused on improving the breakdown strengths and then energy density of the paraelectric BST ceramics[12][13][14][15][16][17][18]. However, the relationship between energy storage density and efficiency was rarely studied, especially in high applied electric field conditions.…”

Microstructures and energy-storage properties of (1 − x)(Na0.5Bi0.5)TiO3–xBaTiO3 with BaO–B2O3–SiO2 additions

“…High energy density capacitors can store more energy than the common one. The good discharged energy in dielectrics is related to high dielectric constant, breakdown strength and low dielectric loss [1][2][3].…”