期刊
CERAMICS INTERNATIONAL
卷 41, 期 2, 页码 2558-2564出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2014.10.177
关键词
Solid state reaction; Milling; Sintering; Fuel cells
资金
- China Scholarship Council (CSC)
- Olle Eriksson Foundation Scholarship at KTH
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning
The protonic conductors BaZr(x)Ce(0.8-x)Ln(0.2)O(3-delta) (x=0.8, 0.5, 0.1; Ln=Y, Sm, Gd, Dy) were successfully prepared using a solid-state reactive-sintering method. NiO (1 wt.%) was added as a sintering aid, and it was proven that NiO produced tremendous enhancement in the densification process. The morphologies of the variously doped BaZr(0.8)Ln(0.2)O(3-delta), BaZr(0.5)Ce(0.3)Ln(0.2)O(3-delta) and BaZr(0.1)Ce(0.7)Ln(0.2)O(3-delta) ceramics, as well as their sintering behaviour, were investigated. The results show that the Ce content in the BaZr(0.8)Ln(0.2)O(3-delta), BaZr(0.5)Ce(0.3)Ln(0.2)O(3-delta) and BaZr(0.1)Ce(0.7)Ln(0.2)O(3-delta) compounds influences the sintering temperature significantly, and a larger Ce content will lead to a lower sintering temperature. In addition, ionic radii of the dopants that are similar to the ionic radii of the B-site will also result in a lowered sintering temperature. Based on the present study, NiO has no influence on the lattice parameters. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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