Superior sinterability of nano-crystalline gadolinium doped ceria powders synthesized by co-precipitation method

Title
Superior sinterability of nano-crystalline gadolinium doped ceria powders synthesized by co-precipitation method
Authors
다사리하리김혜령박종성손지원김병국이해원이종호
Keywords
SOFC; anode; catalyst; Oxide ceramics; Chemical synthesis; Conductivity; X-ray diffraction; Sintering
Issue Date
2010-04
Publisher
Journal of alloys and compounds
Citation
VOL 495, 238-241
Abstract
Reduced sintering temperature of doped ceria can greatly simplify the fabrication process of solid oxide fuel cells (SOFCs) by utilizing the co-firing of all cell components with a single step. In the present study, nano-crystalline gadolinium doped ceria (GDC) powders of high sinterability at lower sintering temperature has been synthesized by co-precipitation at room temperature. The successful synthesis of nano-crystalline GDC was confirmed by XRD, TEM and Raman spectroscopy analysis. Dilatometry studies showed that GDC prepared by this method can be fully densified (97% relative density) at a sintering temperature of 950 ℃ which is fairly lower than ever before. It has also been found that the sintered samples have a higher ionic conductivity of 1.64×10−2 S cm−1 at 600 ℃ which is suitable for the intermediate temperature SOFC application.
URI
http://pubs.kist.re.kr/handle/201004/37220
ISSN
0925-8388
Appears in Collections:
KIST Publication > Article
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