165037 20251204150239.0 doi 10.1016/j.jeurceramsoc.2025.118022 sideral 146471 ART-2025-146471 eng Oliete, P.B. Universidad de Zaragoza (orcid)0000-0003-3480-398X Binary and ternary eutectic composites of the CaO – ZrO2 – MgO system for porous ceramic supports 2025 We recently reported on the use of c-ZrO2-MgO eutectic composites produced by directional solidification as supports for CO2-selective membranes based on molten carbonates. Here, we explore other compositions, particularly within the CaO – ZrO2 – MgO system, with the ultimate goal of improving the membrane permeation by either increasing the support’s ionic conductivity or reducing its tortuosity. The three eutectic-like composites studied display MgO fibres embedded in single-phase or two-phase matrices. The composite with 8.5CaO/48.5ZrO2/43MgO mol% composition consists of MgO fibres in an oxide-ion conducting c-ZrO2 matrix containing both Ca and Mg. A binary CaZrO3 – MgO eutectic-like composite forms at ∼33CaO/35ZrO2/32MgO mol% with MgO fibres in a Ca-poor, Mg-doped CaZrO3 matrix displaying mixed oxide-ion and hole conductivity. For 22CaO/45ZrO2/33MgO mol% composition, a ternary eutectic forms with MgO fibres at the interfaces of CaZrO3 and c-ZrO2 phases. Acid etching tests were conducted to verify the feasibility of fabricating a porous support. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/DGA/T02-23R info:eu-repo/grantAgreement/ES/MCINN/FEDER/PID2021-124863OB-I00 info:eu-repo/grantAgreement/ES/MICIU/CEX2023-001286-S info:eu-repo/semantics/openAccess by-nc-nd https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Merino, R.I. (orcid)0000-0003-0747-405X Peña, J.I. Universidad de Zaragoza (orcid)0000-0003-2242-6822 Sanjuán, M.L. (orcid)0000-0002-5793-2058 5001 065 Universidad de Zaragoza Dpto. Ciencia Tecnol.Mater.Fl. Área Cienc.Mater. Ingen.Metal. 46, 5 (2025), 118022 [12 pp.] J. Eur. Ceram. Soc. Journal of the European Ceramic Society 0955-2219 13566646 http://zaguan.unizar.es/record/165037/files/texto_completo.pdf Versión publicada 2715732 http://zaguan.unizar.es/record/165037/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:165037 articulos driver 2025-12-04-14:39:46 ARTICLE