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Energy storage properties of NaNbO3-CaZrO3 ceramics with coexistence of ferroelectric and antiferroelectric phases.
- Source :
-
Journal of the European Ceramic Society . Dec2018, Vol. 38 Issue 15, p4939-4945. 7p. - Publication Year :
- 2018
-
Abstract
- Anti-ferroelectric materials with large saturated polarization, small remnant polarization, and moderate breakdown strength are receiving increasing attention for modern high-power electrical systems. Here we demonstrated that by incorporating CaZrO 3 into NaNbO 3 ceramics, the antiferroelectricity in NaNbO 3 -CaZrO 3 solid solutions could be stabilized at room temperature. The effects of phase constitution and microstructure on the dielectric properties, electrical breakdown strength, and energy storage properties of the NaNbO 3 -CaZrO 3 ceramics were investigated. Ferroelectric and antiferroelectric phase coexistence in the NaNbO3-CaZrO 3 was confirmed by XRD and TEM analyses. With increasing CaZrO 3 content, the grain size was reduced, and the dielectric breakdown strength was improved. Therefore, a high energy density of 0.55 J/cm 3 and efficiency of 63% was obtained in the NaNbO 3 -0.04CaZrO 3 ceramics. These lead-free NaNbO 3 -CaZrO 3 antiferroelectrics with good electrical energy storage can be exploited for high-power storage devices. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09552219
- Volume :
- 38
- Issue :
- 15
- Database :
- Academic Search Index
- Journal :
- Journal of the European Ceramic Society
- Publication Type :
- Academic Journal
- Accession number :
- 131334396
- Full Text :
- https://doi.org/10.1016/j.jeurceramsoc.2018.07.029