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https://hdl.handle.net/1822/68468
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Campo DC | Valor | Idioma |
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dc.contributor.author | Jayakrishnan, A. R. | por |
dc.contributor.author | Silva, José Pedro Basto | por |
dc.contributor.author | Kamakshi, K. | por |
dc.contributor.author | Annapureddy, V. | por |
dc.contributor.author | Mercioniu, I. F. | por |
dc.contributor.author | Sekhar, K. C. | por |
dc.date.accessioned | 2020-12-10T09:08:23Z | - |
dc.date.issued | 2021 | - |
dc.identifier.issn | 2468-2179 | por |
dc.identifier.uri | https://hdl.handle.net/1822/68468 | - |
dc.description.abstract | In this work, we report a novel strategy to enhance the dielectric breakdown strength and the energy storage performance of lead-free relaxor ferroelectric ceramics through the fabrication of semiconductor/ relaxor 0e3 type composites based on 0.6Ba(Zr0.2Ti0.8)O3-0.4(Ba0.7Ca0.3)TiO3 [BZCT] and ZnO. X-ray diffraction (XRD), Raman spectroscopy and scanning electron microscopy (SEM) measurements confirm the formation of semiconductor/relaxor 0e3 type composites, in which ZnO particles are randomly distributed at the grain boundaries of BZCT. Further, the XRD analysis suggests a structural phase change from a tetragonal to a pseudocubic phase as the ZnO content increases from 0 to 5 wt. % in BZCT/ZnO composites. The pseudocubic phase favors the relaxor behavior of the composites as is evident from dielectric studies. The polarization-electric field (P-E) loops reveal the ferroelectric nature of the BZCT/ ZnO composites. The energy storage properties of BZCT/ZnO composite ceramics as a function of different wt. % of ZnO are found to be optimum at 1 wt. % with a recoverable energy density of 2.61 J/cm3 and an efficiency of 74.2%, at an electric field of 282 kV/cm. Besides, an enhancement of 166% in the electric breakdown and 220% in the recoverable energy density was achieved compared to the BZCT ceramics due to the improved density and the large value of DP ¼ Pm - Pr (25.55 mC/cm2 ). Therefore, this work evidences that the formation of semiconductor/relaxor 0e3 type composites can be an effective way to significantly improve the energy storage performance of lead-free relaxor ferroelectric ceramics. | por |
dc.description.sponsorship | This study has been partially supported by (i) DST-SERB, Govt. of India through Grant ECR/2017/000068 (KCS), (ii) UGC through grant nos. F.4-5(59-FRP)/2014(BSR) and (iii) Portuguese Foundation for Science and Technology in the framework of the Strategic Funding UIDB/FIS/04650/2020 (JPBS). The author A. R. Jayakrishnan acknowledges the Central University of Tamil Nadu, India for his Ph. D fellowship. The authors acknowledge the CERIC-ERIC Consortium for access to experimental facilities and financial support under proposal 20192055. | por |
dc.language.iso | eng | por |
dc.publisher | Elsevier 1 | por |
dc.rights | restrictedAccess | por |
dc.subject | Semiconductor/relaxor 0e3 type composites | por |
dc.subject | Relaxor ferroelectrics | por |
dc.subject | Energy storage capacitors | por |
dc.subject | Lead-free ferroelectric ceramics | por |
dc.subject | Semiconductor/relaxor 0–3 type composites | por |
dc.title | Semiconductor/relaxor 0–3 type composites: a novel strategy for energy storage capacitors | por |
dc.type | article | por |
dc.peerreviewed | yes | por |
dc.relation.publisherversion | https://www.sciencedirect.com/science/article/pii/S2468217920300861#! | por |
oaire.citationStartPage | 19 | por |
oaire.citationEndPage | 26 | por |
oaire.citationIssue | 1 | por |
oaire.citationVolume | 6 | por |
dc.identifier.doi | 10.1016/j.jsamd.2020.09.012 | por |
dc.date.embargo | 10000-01-01 | - |
dc.subject.wos | Science & Technology | por |
sdum.journal | Journal of Science: Advanced Materials and Devices | por |
Aparece nas coleções: | CDF - FMNC - Artigos/Papers (with refereeing) |
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1-s2.0-S2468217920300861-main (2).pdf Acesso restrito! | 3,12 MB | Adobe PDF | Ver/Abrir |