期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 40, 期 15, 页码 5612-5618出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2020.06.010
关键词
Gd-doped ceria; Cold sintering; Oxygen defects; Creep; Electrostriction
资金
- DFF-Research project grants from the Danish Council for Independent Research, Technology and Production Sciences [48293]
- European H2020-FETOPEN-2016-2017 project BioWings [801267]
- Center for Nanoanalysis and Electron Microscopy (CENEM)
- Interdisciplinary Center for Nanostructured Films (IZNF) at University Erlangen-Nurnberg (FAU)
- Thousand Talents Program of China
- Sichuan Province
In this report, the effect of the cold sintering process (CSP) on the electro-chemo-mechanical properties of 10 mol % Gd-doped ceria (GDC) is investigated. High purity nanoscale GDC powder is sintered via a cold sintering process (CSP) in pure water followed by post-annealing at 1000 degrees C. The resultant ceramics exhibits high relative density (similar to 90 %) with a fine grain size of similar to 100 nm. This sample illustrates comparable electrochemical properties at intermediate-high temperatures and electromechanical properties at room temperature to the material prepared via conventional firing, i.e., sintering in the air at 1450 degrees C. Moreover, a large creep constant, as well a low elastic modulus and hardness, are also observed in the CSP sample.
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