000086424 001__ 86424
000086424 005__ 20240104111810.0
000086424 0247_ $$2doi$$a10.1016/j.jeurceramsoc.2018.12.049
000086424 0248_ $$2sideral$$a109572
000086424 037__ $$aART-2019-109572
000086424 041__ $$aeng
000086424 100__ $$0(orcid)0000-0003-3995-5763$$aTorres, M.A.$$uUniversidad de Zaragoza
000086424 245__ $$aSignificant enhancement of the thermoelectric performance in Ca3Co4O9 thermoelectric materials through combined strontium substitution and hot-pressing process
000086424 260__ $$c2019
000086424 5060_ $$aAccess copy available to the general public$$fUnrestricted
000086424 5203_ $$aThis work explores the possibilities for a further enhancement of the thermoelectric properties of Ca3Co4O9 by Sr-doping combined with hot-pressing. Modified hot-pressing process resulted in highly-textured and dense ceramics. Sr-doping significantly improves electrical properties, resulting in extremely large power factor (1.2 mW/K2m at 800 °C) due to simultaneous electrical resistivity decrease and Seebeck coefficient increase. The main effect on cumulative electrical performance is provided by the Seebeck coefficient, reaching 270µV/K at 800 °C. XPS revealed relatively high average cobalt oxidation state at room temperature (+3.3), compared to materials produced by conventional sintering. The results of combined XPS and Auger electron spectroscopy emphasize the importance of high densification in Ca3Co4O9-based ceramics for preventing phase decomposition and interaction with CO2 and moisture. Still, despite the exceptional electrical performance, the calculated figure-of-merit (estimated as 0.29 at 800 °C) is around the best reported in the literature due to a high thermal conductivity (4.4 W/K m at room temperature).
000086424 536__ $$9info:eu-repo/grantAgreement/ES/DGA/T54-17R$$9info:eu-repo/grantAgreement/ES/MINECO-FEDER/MAT2017-82183-C3-1-R
000086424 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
000086424 590__ $$a4.495$$b2019
000086424 591__ $$aMATERIALS SCIENCE, CERAMICS$$b1 / 28 = 0.036$$c2019$$dQ1$$eT1
000086424 592__ $$a1.164$$b2019
000086424 593__ $$aMaterials Chemistry$$c2019$$dQ1
000086424 593__ $$aCeramics and Composites$$c2019$$dQ1
000086424 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000086424 700__ $$aCosta, F.M.
000086424 700__ $$aFlahaut, D.
000086424 700__ $$aTouati, K.
000086424 700__ $$aRasekh, S.
000086424 700__ $$aFerreira, N.M.
000086424 700__ $$aAllouche, J.
000086424 700__ $$aDepriester, M.
000086424 700__ $$0(orcid)0000-0002-0794-3998$$aMadre, M.A.$$uUniversidad de Zaragoza
000086424 700__ $$aKovalevsky, A.V.
000086424 700__ $$0(orcid)0000-0001-9995-6368$$aDiez, J.C.$$uUniversidad de Zaragoza
000086424 700__ $$0(orcid)0000-0001-7056-0546$$aSotelo, A.$$uUniversidad de Zaragoza
000086424 7102_ $$15002$$2305$$aUniversidad de Zaragoza$$bDpto. Ingeniería Diseño Fabri.$$cÁrea Expresión Gráfica en Ing.
000086424 7102_ $$15001$$2065$$aUniversidad de Zaragoza$$bDpto. Ciencia Tecnol.Mater.Fl.$$cÁrea Cienc.Mater. Ingen.Metal.
000086424 773__ $$g39, 4 (2019), 1186-1192$$pJ. Eur. Ceram. Soc.$$tJournal of the European Ceramic Society$$x0955-2219
000086424 8564_ $$s611240$$uhttps://zaguan.unizar.es/record/86424/files/texto_completo.pdf$$yPostprint
000086424 8564_ $$s51068$$uhttps://zaguan.unizar.es/record/86424/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint
000086424 909CO $$ooai:zaguan.unizar.es:86424$$particulos$$pdriver
000086424 951__ $$a2024-01-04-11:01:55
000086424 980__ $$aARTICLE