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Superior energy storage and discharge performance achieved in PbHfO3-based antiferroelectric ceramics.
- Source :
- Journal of Applied Physics; 3/7/2024, Vol. 135 Issue 9, p1-10, 10p
- Publication Year :
- 2024
-
Abstract
- Dielectric capacitors prepared by antiferroelectric (AFE) materials have the advantages of large power density and fast discharge ability. It has been a focus on the improvement of the recoverable energy density (W<subscript>rec</subscript>) and discharge energy–density (W<subscript>dis</subscript>) in the AFE ceramics. To address the above issue, optimizing the proportion of components is proposed for enhancing ceramic antiferroelectricity, ultimately improving the breakdown strength (E<subscript>b</subscript>) and W<subscript>rec</subscript>. In this work, an ultrahigh W<subscript>rec</subscript> (14.3 J/cm<superscript>3</superscript>) with an excellent energy efficiency (η) of 81.1% is obtained in (Pb<subscript>0.96</subscript>Sr<subscript>0.02</subscript>La<subscript>0.02</subscript>)(Hf<subscript>0.9</subscript>Sn<subscript>0.1</subscript>)O<subscript>3</subscript> AFE ceramic at electric field of 490 kV/cm, which is the maximum value reported in lead-based AFE ceramics fabricated by the conventional solid-state reaction method so far. The multistage phase transition induced by the electric field is observed in the polarization–electric field (P–E) hysteresis loops. Furthermore, an outstanding power density (P<subscript>D</subscript>) of 335 MW/cm<superscript>3</superscript> and an excellent W<subscript>dis</subscript> of 8.97 J/cm<superscript>3</superscript> with a rapid discharge speed (102 ns) are obtained at electric field of 390 kV/cm. In addition, (Pb<subscript>0.96</subscript>Sr<subscript>0.02</subscript>La<subscript>0.02</subscript>)(Hf<subscript>0.9</subscript>Sn<subscript>0.1</subscript>)O<subscript>3</subscript> ceramics also possess an excellent thermal and frequency stability. These exceptional properties indicate that (Pb<subscript>0.98−x</subscript>Sr<subscript>x</subscript>La<subscript>0.02</subscript>)(Hf<subscript>0.9</subscript>Sn<subscript>0.1</subscript>)O<subscript>3</subscript> ceramics are a potential candidate for pulsed power devices and power electronic devices. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 135
- Issue :
- 9
- Database :
- Complementary Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 175915487
- Full Text :
- https://doi.org/10.1063/5.0199206