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Enhanced energy storage properties and superior thermal stability in SNN-based tungsten bronze ceramics through substitution strategy.
- Source :
-
Journal of the European Ceramic Society . Jun2022, Vol. 42 Issue 6, p2781-2788. 8p. - Publication Year :
- 2022
-
Abstract
- Tungsten bronze ceramics of composition Sr 2 Ag 0.2 Na 0.8 Nb 5- x Ta x O 15 were synthesized by solid state methods to investigate the impact of Ta replacement on the structure and energy-storage properties (ESP). The study on the relationship between structure and electric properties revealed three main conclusions: (1) as the Ta5+ concentration increased, the crystal structure transformed from an orthorhombic Im 2 a phase to a tetragonal paraelectric P 4 bm phase; (2) a high recoverable energy storage density (1.44 J/cm3) and a moderate efficiency (82%) under low-electric fields was obtained in x = 0.3 sample; (3) both dielectric properties (−9.6 to 232.7 °C) and ESP (30–150 °C) exhibit an excellent thermal stability for x = 0.3 sample. In addition, a high current density (863.69 A/cm2) and a large powder density (70.21 MW/cm3) were achieved simultaneously. The current system could be a promising candidate in temperature-stable dielectric capacitors under low-fields and over a broad temperature range. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09552219
- Volume :
- 42
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Journal of the European Ceramic Society
- Publication Type :
- Academic Journal
- Accession number :
- 155377370
- Full Text :
- https://doi.org/10.1016/j.jeurceramsoc.2022.02.005