Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/62675
Título: | Microstructure tailoring for enhancing the energy storage performance of 0.98[0.6Ba(Zr0.2Ti0.8)O3-0.4(Ba0.7Ca0.3)TiO3]-0.02BiZn1/2Ti1/2O3 ceramic capacitors |
Autor(es): | Jayakrishnan, A. R. Karthik Yadav, Penna Venkata Silva, José Pedro Basto Sekhar, K. C. |
Palavras-chave: | Ceramics Relaxor ferroelectrics Lattice distortion Grain size Recoverable energy |
Data: | 2020 |
Editora: | Elsevier 1 |
Revista: | Journal of Science: Advanced Materials and Devices |
Citação: | A.R. Jayakrishnan, P.V. Karthik Yadav, J.P.B. Silva, K.C. Sekhar, Microstructure tailoring for enhancing the energy storage performance of 0.98[0.6Ba(Zr0.2Ti0.8)O3-0.4(Ba0.7Ca0.3)TiO3]-0.02BiZn1/2Ti1/2O3 ceramic capacitors, Journal of Science: Advanced Materials and Devices, https://doi.org/10.1016/j.jsamd.2019.12.001 |
Resumo(s): | In this work, we introduce a new approach to enhance the energy storage properties of 0.98[0.6Ba(Zr0.2Ti0.8)O3-0.4(Ba0.7Ca0.3)TiO3]-0.02BiZn1/2Ti1/2O3 [BCZT-BZ] ceramic capacitors via tuning the microstructure through the sintering time. The x-ray diffraction (XRD) analysis confirmed the formation of BCZT-BZ solid solution without any secondary phase. It is observed that the rhombohedral and tetragonal phases are co-existing in BCZTBZ samples sintered at different time periods, except the one with sintering time of 11 hrs, where the rhombohedral and pseudocubic phases co-exist. The energy dispersive x-ray spectroscopy (EDS) revealed the presence of the elements constituting the BCZT-BZ samples. The variation of the grain size with the sintering time is explained based on the coalescence process and the Ostwald ripening mechanism. A strong correlation was observed between the ferroelectric properties and the microstructure. The sample sintered for 11 hrs with pseudocubic nature and small grain size shows a slim P-E loop owing to a high recoverable energy density (2.61 J/cm3) and a higher efficiency (91 %) at an electric field of 150 kV/cm. The observed recoverable energy density was found 3 to 13 times higher than that reported for the BCZT bulk ceramics. The findings in the present study suggest that BCZT-BZ ceramics are attractive materials for the energy storage capacitor applications. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/62675 |
DOI: | 10.1016/j.jsamd.2019.12.001 |
ISSN: | 2468-2284 |
e-ISSN: | 2468-2179 |
Versão da editora: | https://www.sciencedirect.com/science/article/pii/S2468217919302382 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | CDF - FMNC - Artigos/Papers (with refereeing) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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1-s2.0-S2468217919302382-main.pdf Acesso restrito! | 9,37 MB | Adobe PDF | Ver/Abrir |