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Erschienen in:
01.08.2012
Effects of SrO–B2O3–SiO2 glass additive on densification and energy storage properties of Ba0.4Sr0.6TiO3 ceramics
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 8/2012
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Abstract
SrO–B2O3–SiO2 glass powders were prepared and employed as sintering aids to reduce the sintering temperature of Ba0.4Sr0.6TiO3 ceramics. The effects of glass content and sintering temperature on the densification, dielectric properties and energy storage properties of Ba0.4Sr0.6TiO3 ceramics have been investigated. The relative density characterization results indicate that densification of Ba0.4Sr0.6TiO3 ceramics with glass content becomes apparently from sintering temperature of 1,060 °C. XRD results show all Ba0.4Sr0.6TiO3 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/cm3 with an energy efficiency of 67.4% was achieved for Ba0.4Sr0.6TiO3 ceramic with 2.0 wt% glass addition sintered at 1,180 °C.