Improvement of Dielectric Breakdown Strength in (1-x)Sr0.7Ba0.3Nb2O6-xSr0.7Bi0.2TiO3 Ceramics

Improvement of Dielectric Breakdown Strength in (1-x)Sr0.7Ba0.3Nb2O6-xSr0.7Bi0.2TiO3 Ceramics

In this work, a series of (1-x)Sr0.7Ba0.3Nb2O6-xSr0.7Bi0.2TiO3 ceramics were formulated by a phase-mixed sintering, the microstructure and energy storage performance were studied. The introduction of SBT induces the formation of equiaxed crystals leading to the denser microstructure, thus improving...

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Veröffentlicht in:Key engineering materials 2020-05, Vol.842, p.153-159
Hauptverfasser: Yuan, Ying, Li, En Zhu, Zhang, Shu Ren, Cao, Lei
Format: Artikel
Sprache:eng
Schlagworte:
Ceramics
Dielectric breakdown
Dielectric relaxation
Dielectric strength
Energy storage
Microstructure
Relaxors
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Zusammenfassung:In this work, a series of (1-x)Sr0.7Ba0.3Nb2O6-xSr0.7Bi0.2TiO3 ceramics were formulated by a phase-mixed sintering, the microstructure and energy storage performance were studied. The introduction of SBT induces the formation of equiaxed crystals leading to the denser microstructure, thus improving the dielectric breakdown strength. In addition, the enhancement of relaxor behavior improves the energy storage performance. For 0.94Sr0.7Ba0.3Nb2O6-0.06Sr0.7Bi0.2TiO3, an energy storage density of 0.49J/cm3 and an efficiency of 94.2% were achieved.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.842.153