Ultrafast high-temperature sintering of gadolinia-doped ceria

• Published in: Journal of the European Ceramic Society Vol. 43; no. 11; pp. 4837 - 4843
• Main Authors: Alemayehu, Adam, Biesuz, Mattia, Javan, Kimia Y., Tkach, Alexander, Vilarinho, Paula M., Sglavo, Vincenzo M., Tyrpekl, Václav
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.09.2023
• Subjects: Ceria; Gadolinia; Oxygen conductor; Ultrafast sintering; Oxygen conductor; Gadolinia; Ultrafast sintering; Ceria
• ISSN: 0955-2219; 1873-619X
• DOI: 10.1016/j.jeurceramsoc.2023.04.025

Ultrafast high-temperature sintering (UHS) is a rapidly growing research area of material science and engineering. Herein we present UHS of gadolinia-doped ceria (GDC) powders in single and multi-step approaches. The sintered ceramics were characterized from a physical and electrochemical point of view. When the power is applied gradually during the multistep UHS process crack-free GDC ceramics can be obtained with 95 % bulk density using commercial powder. Oxalate converted GDC powder gave 86 % bulk density with the same multistep sintering process. Additionally, it is shown that multistep UHS is also suitable for multilayer co-sintering necessary for solid oxide fuel cells (SOFC), as demonstrated by the production of dense GDC electrolyte in tight contact with porous electrodes. •Ultrafast high-temperature sintering was used to prepare Gd-doped ceria ceramics.•Single and multi-step sintering cycles were developed to improve the final compacts.•Electrochemical performance of the final ceramics was studied.•Co-sintering of SOFC layered systems by UHS was successfully developed.