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Enhanced energy storage properties of silver niobate antiferroelectric ceramics with A-site Eu3+ substitution and their structural origin.
- Source :
- Journal of Applied Physics; 3/28/2024, Vol. 135 Issue 12, p1-11, 11p
- Publication Year :
- 2024
-
Abstract
- AgNbO<subscript>3</subscript> (AN)-based lead-free antiferroelectric ceramics are widely studied for their use as dielectric capacitor materials. In this study, Eu<superscript>3+</superscript>-doped AN ceramics were prepared and the results show that Eu<superscript>3+</superscript> diffused into the AN lattice. The ceramics were formed by M1 and M2 phases coexisting at room temperature, as distinct from the M1 (M: monoclinic) phase of pure AN. Electrical properties and structural characterization showed that the antiferroelectric stability of the ceramics increases with the increase in Eu<superscript>3+</superscript> levels. At room temperature, Ag<subscript>0.94</subscript>Eu<subscript>0.02</subscript>NbO<subscript>3</subscript> ceramic exhibited a good energy storage density of 5.3 J/cm<superscript>3</superscript> and a high efficiency of 71.9%. When the temperature rises from room temperature to 140 °C, the efficiency of the sample decreases from 80.4% to 67.1% and W<subscript>r</subscript> decreases from 2.1 to 2.0 J/cm<superscript>3</superscript>, which indicates that the sample has good temperature stability. The time constant (t<subscript>0.9</subscript>) of this sample was less than 60 ns and the power density (P<subscript>D</subscript>) was 51.3 MW/cm<superscript>3</superscript>, indicating excellent charge–discharge capabilities. This novel ceramic is expected to be used as a new dielectric capacitor material for pulsed power supplies. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 135
- Issue :
- 12
- Database :
- Complementary Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 176342865
- Full Text :
- https://doi.org/10.1063/5.0200472