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Enhanced recoverable energy density in Ca0.7Sm0.2TiO3-modified Bi0.5Na0.5TiO3–SrTiO3 ceramic capacitors.
- Source :
- Journal of Materials Science; Jul2024, Vol. 59 Issue 27, p12317-12324, 8p
- Publication Year :
- 2024
-
Abstract
- Ceramic capacitors are receiving increasing interest because of their applications in pulsed-power devices. The perovskite oxide Bi<subscript>0.5</subscript>Na<subscript>0.5</subscript>TiO<subscript>3</subscript> (BNT)-based ferroelectric ceramics are regarded as prospective lead-free candidate for dielectric capacitors because of the high polarization and outstanding relaxor behaviour. Herein, the relaxor ferroelectric (0.7−x)Bi<subscript>0.5</subscript>Na<subscript>0.5</subscript>TiO<subscript>3</subscript>–0.3SrTiO<subscript>3</subscript>–xCa<subscript>0.7</subscript>Sm<subscript>0.2</subscript>TiO<subscript>3</subscript> ceramics synthesized through solid-state route and exhibited pseudocubic perovskite structure and strong relaxor behaviour. With increasing Ca<subscript>0.7</subscript>Sm<subscript>0.2</subscript>TiO<subscript>3</subscript> content, the moderate permittivity and reduced grain size contributed to the monotonically increased electric breakdown strength. Among prepared samples, the x = 0.2 ceramic displayed slimmer polarization-electric field curves with a remarkable recoverable energy density (~6.8 J/cm<superscript>3</superscript>) and a satisfied efficiency (~82.2%) under external electric field of 450 kV/cm. Moreover, the x = 0.2 ceramic also exhibited a superb thermal reliability of energy storage properties (3.9–4.5 J/cm<superscript>3</superscript> with variation of 13.3% in 25–160 °C) resulting from the diffuse phase transition. The above results make the x = 0.2 ceramics becoming promising candidates for pulsed-power devices. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00222461
- Volume :
- 59
- Issue :
- 27
- Database :
- Complementary Index
- Journal :
- Journal of Materials Science
- Publication Type :
- Academic Journal
- Accession number :
- 178462189
- Full Text :
- https://doi.org/10.1007/s10853-024-09953-2