000108302 001__ 108302
000108302 005__ 20230519145350.0
000108302 0247_ $$2doi$$a10.1016/j.ceramint.2020.10.227
000108302 0248_ $$2sideral$$a121212
000108302 037__ $$aART-2021-121212
000108302 041__ $$aeng
000108302 100__ $$aMoshtaghioun, B.M.
000108302 245__ $$aCation-driven electrical conductivity in Ta-doped orthorhombic zirconia ceramics
000108302 260__ $$c2021
000108302 5060_ $$aAccess copy available to the general public$$fUnrestricted
000108302 5203_ $$aThis paper is devoted to the study of the electrical conductivity of tantalum-doped zirconia ceramics prepared by spark plasma sintering. In this study, the temperature dependence of conductivity in as-prepared specimens and in those previously annealed in air is determined and compared. A semi-empirical model, which is based on the oxidation states of the cations, has been developed and successfully assessed. According to this, the conductivity is basically controlled by the diffusion of tetravalent zirconium cations in both cases, although the concentration of these species varies drastically with the amount of induced oxygen vacancies. This is a quite unexpected fact, since conductivity is normally controlled by anionic diffusion in zirconia ceramics. This option is forbidden here due to the presence of substitutional pentavalent cations. Therefore, conductivity values are much lower than those reported in trivalent or divalent substitutional cation doped zirconia ceramics.
000108302 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
000108302 590__ $$a5.532$$b2021
000108302 591__ $$aMATERIALS SCIENCE, CERAMICS$$b3 / 29 = 0.103$$c2021$$dQ1$$eT1
000108302 593__ $$aElectronic, Optical and Magnetic Materials$$c2021$$dQ1
000108302 593__ $$aSurfaces, Coatings and Films$$c2021$$dQ1
000108302 593__ $$aProcess Chemistry and Technology$$c2021$$dQ1
000108302 593__ $$aCeramics and Composites$$c2021$$dQ1
000108302 594__ $$a8.0$$b2021
000108302 592__ $$a0.887$$b2021
000108302 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000108302 700__ $$0(orcid)0000-0002-7819-8956$$aLaguna-Bercero, M.A.
000108302 700__ $$0(orcid)0000-0003-2242-6822$$aPeña, J.I.$$uUniversidad de Zaragoza
000108302 700__ $$aGómez-García, D.
000108302 700__ $$aDomínguez-Rodríguez, A.
000108302 7102_ $$15001$$2065$$aUniversidad de Zaragoza$$bDpto. Ciencia Tecnol.Mater.Fl.$$cÁrea Cienc.Mater. Ingen.Metal.
000108302 773__ $$g47, 5 (2021), 7248-7252$$pCeram. int.$$tCeramics International$$x0272-8842
000108302 8564_ $$s372500$$uhttps://zaguan.unizar.es/record/108302/files/texto_completo.pdf$$yPostprint
000108302 8564_ $$s2368824$$uhttps://zaguan.unizar.es/record/108302/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint
000108302 909CO $$ooai:zaguan.unizar.es:108302$$particulos$$pdriver
000108302 951__ $$a2023-05-18-13:26:09
000108302 980__ $$aARTICLE