Conventional and field-assisted sintering of nanosized Gd-doped ceria synthesized by co-precipitation. Issue 10 (1st August 2016)

• Record Type: Journal Article
• Authors: Biesuz, M.; Dell'Agli, G.; Spiridigliozzi, L.; Ferone, C.; Sglavo, V.M.
• Is Part Of: Ceramics international. Volume 42:Issue 10(2016)
• Page Start: 11766
• Page End: 11771
• Publication Date: 2016-08-01
• Subjects: Sintering -- GDC -- Flash sintering -- Co-precipitation; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.04.097
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: 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% Gd2 O3 . 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.