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http://hdl.handle.net/10773/19937
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DC Field | Value | Language |
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dc.contributor.author | Davarpanah, A. | pt |
dc.contributor.author | Yaremchenko, A. A. | pt |
dc.contributor.author | Fagg, D. P. | pt |
dc.contributor.author | Frade, J. R. | pt |
dc.date.accessioned | 2017-12-07T19:29:59Z | - |
dc.date.issued | 2014 | pt |
dc.identifier.issn | 0360-3199 | pt |
dc.identifier.uri | http://hdl.handle.net/10773/19937 | - |
dc.description.abstract | The electrochemical performance and dimensional stability of Ni-YSZ cermets, conventionally used as solid oxide fuel cell anodes, depend strongly on their microstructure and therefore fabrication conditions. This work was focused on the assessment of a less common two-step firing procedure for fabrication of Ni-YSZ cermets with comparatively low nickel fraction of 30 vol.%. The impact of different firing parameters including peak temperature (1623-1723 K), heating/cooling rate (4-10 K/min), and isothermal treatment temperature (1473-1573 K) and time (2-8 h), on the porosity and electrical conductivity of cermets was assessed employing Taguchi experimental planning. The applied procedure yielded Ni-YSZ composites with porosity 26-35% and electrical conductivity ranging from 170 to 420 S/cm at 873-1173 K in 10%H-2-N-2 atmosphere. Microstructural studies indicated that the conductivity is determined mainly by Ni particle size distribution. Analysis of results suggests that, for the studied range of sintering parameters, a higher peak temperature and ramp rate are favorable for the improvement of conductivity, whereas isothermal dwell temperature and time have a rather minor effect on the conductivity level. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. | pt |
dc.language.iso | eng | pt |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | pt |
dc.relation | info:eu-repo/grantAgreement/FCT/5876-PPCDTI/118933/PT | pt |
dc.relation | info:eu-repo/grantAgreement/FCT/COMPETE/132936/PT | pt |
dc.rights | restrictedAccess | por |
dc.subject | YTTRIA-STABILIZED ZIRCONIA | pt |
dc.subject | NICKEL-OXIDE | pt |
dc.subject | ELECTRICAL-PROPERTIES | pt |
dc.subject | NI/YSZ CERMETS | pt |
dc.subject | TRANSPORT-PROPERTIES | pt |
dc.subject | CONDUCTIVITY | pt |
dc.subject | COMPOSITES | pt |
dc.subject | ELECTROLYTE | pt |
dc.subject | CERAMICS | pt |
dc.subject | KINETICS | pt |
dc.title | Ni-YSZ cermets for solid oxide fuel cell anodes via two-step firing | pt |
dc.type | article | pt |
dc.peerreviewed | yes | pt |
ua.distribution | international | pt |
degois.publication.firstPage | 15046 | pt |
degois.publication.issue | 27 | pt |
degois.publication.lastPage | 15056 | pt |
degois.publication.title | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | pt |
degois.publication.volume | 39 | pt |
dc.date.embargo | 10000-01-01 | - |
dc.relation.publisherversion | 10.1016/j.ijhydene.2014.07.053 | pt |
dc.identifier.doi | 10.1016/j.ijhydene.2014.07.053 | pt |
Appears in Collections: | CICECO - Artigos |
Files in This Item:
File | Description | Size | Format | |
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Ni-YSZ cermets for solid oxide fuel cell anodes via two-step firing_10.1016j.ijhydene.2014.07.053.pdf | 2.11 MB | Adobe PDF |
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