Back to Search
Start Over
AgNbO3-based antiferroelectric ceramics with superior energy storage performance via Gd/Ta substitution at A/B sites.
- Source :
-
Ceramics International . Jun2023:Part B, Vol. 49 Issue 11, p18143-18152. 10p. - Publication Year :
- 2023
-
Abstract
- Dielectric materials have attracted considerable attention owing to their excellent power densities and fast charge/discharge characteristics. AgNbO 3 , as a typical antiferroelectric (AFE) material, is regarded as a promising dielectric material owing to its large polarization value and environmentally friendly nature. However, the low energy density of this system limits its further application. In this study, the slim P-E loops are implemented by Gd/Ta substitution at A/B sites, which provide a superior energy storage performance with a W rec of 6.99 J/cm3 under 400 kV/cm. This improvement in energy storage property can be attributed to three factors: firstly, a significant improvement in the AFE stability is obtained by reducing the tolerance factor t and the B-site polarizability; secondly, this strategy leads to a reduction in the grain size of the material, optimizing the breakdown electric field E b of AN-based ceramics; lastly, A/B-site codoping induces structural distortion of the material, constructs an internal chemical pressure, and suppresses its oxide octahedral tilting. Furthermore, the Gd/Ta co-doped ceramics exhibit an excellent practical charging/discharging efficiency (<10 μs). This work demonstrates that the electrical properties of AN-based ceramics have been optimized by Gd/Ta codoping, making them good candidates for pulsed power systems. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02728842
- Volume :
- 49
- Issue :
- 11
- Database :
- Academic Search Index
- Journal :
- Ceramics International
- Publication Type :
- Academic Journal
- Accession number :
- 163186351
- Full Text :
- https://doi.org/10.1016/j.ceramint.2023.02.183