期刊
CERAMICS INTERNATIONAL
卷 42, 期 10, 页码 11766-11771出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2016.04.097
关键词
Sintering; GDC; Flash sintering; Co-precipitation
Gadolinium-doped ceria is an attractive electrolyte for potential application in SOFCs operating at intermediate temperature; for such use, the fundamental compositions typically contain 10-20 mol% Gd2O3. In this work, we produced nanosized 10 mol% gadolinium-doped ceria powder by co-precipitation, starting from Ce and Gd nitrate solutions and using ammonia solution as precipitating agent. The co-precipitate was characterized by DTA-TG, TEM, XRD and nitrogen adsorption analyses. We studied the behavior of the nanopowder under both conventional and Flash sintering. Very different behavior was seen: the conventional sintering cycle produced a poorly densified material, while Flash sintering allowed production of a perfectly densified material, with uniform sub-micrometric grain size. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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