Ultrafast high-temperature sintering (UHS) of cerium oxide-based compound
Ahsanul Kabir,
Bartłomiej Lemieszek,
Jakub Karczewski,
Emanuele De Bona,
Maxim Varenik,
Sebastian Molin,
Mattia Biesuz
Affiliations
Ahsanul Kabir
Institute for Manufacturing Technology of Ceramic Components and Composites, University of Stuttgart, 70569, Stuttgart, Germany; Corresponding author.
Bartłomiej Lemieszek
Advanced Materials Center, Faculty of Electronics, Telecommunications, and Informatics, Gdańsk University of Technology, Ul. G. Narutowicza 11/12, 80-233, Gdańsk, Poland
Jakub Karczewski
Institute of Nanotechnology and Materials Engineering, Faculty of Applied Physics and Mathematics, Gdańsk University of Technology, 80-233, Gdańsk, Poland
Emanuele De Bona
Department of Industrial Engineering, Via Sommarive 9, 38123, Trento, Italy
Maxim Varenik
Department of Molecular Chemistry and Materials Science, Weizmann Institute of Science, Rehovot, 7610001, Israel
Sebastian Molin
Advanced Materials Center, Faculty of Electronics, Telecommunications, and Informatics, Gdańsk University of Technology, Ul. G. Narutowicza 11/12, 80-233, Gdańsk, Poland
Mattia Biesuz
Department of Industrial Engineering, Via Sommarive 9, 38123, Trento, Italy
Ultrafast high-temperature sintering (UHS) is an innovative sintering technique that can densify ceramics in a few seconds, dramatically reducing the carbon footprint and firing costs. In this work, the feasibility of applying UHS in Gd-doped ceria (GDC) and GDC-Er-stabilized bismuth oxide (ESB) composite powders was investigated. At high UHS currents (22–24 A), fully dense GDC samples with a large grain size were obtained. Nonetheless, most of the GDC pellets exhibited micro/macro cracks, which were reduced by lowering the sample thickness. Interestingly, the GDC-ESB composite samples exhibit no cracks or fragmentation at all, thanks to ESB as a sintering aid. Thie samples were further characterized from an electrochemical and electromechanical point of view. The GDC-ESB material displays an ionic conductivity value of ∼1.5 × 10−2 S/cm at 600 °C and frequency-stable (0.1–350 Hz) room temperature electrostriction strain coefficient of ∼10−18 (m/V)2.
