A comparative study of NiO–Ce0.9Gd0.1O1.95 nanocomposite powders synthesized by hydroxide and oxalate co-precipitation methods

• Published in: Ceramics International Vol. 38; no. 1; pp. 85 - 92
• Main Authors: Ding, Changsheng, Sato, Kazuhisa, Mizusaki, Junichiro, Hashida, Toshiyuki
• Format: Journal Article
• Language: English; Japanese
• Published: Elsevier BV 01.01.2012
• Subjects: Coprecipitation; Hydroxides; Nanocomposites; Nanomaterials; Nanostructure; Oxalates; Particle size; Particle size distribution
• ISSN: 0272-8842
• DOI: 10.1016/j.ceramint.2011.06.041

NiO-Ce0.9Gd0.1O1.95 (NiO-GDC) nanocomposite powders, used as anode materials for low-temperature solid oxide fuel cells (SOFCs), were synthesised by hydroxide and oxalate reverse co-precipitation methods, respectively. The crystal phases, crystallite size, particle size, particle size distribution, and sintering characteristics of the synthesised NiO-GDC nanocomposite powders were investigated and compared. The results showed that the different coprecipitation methods affected the synthesis and characteristics of the NiO-GDC nanocomposite powders. The NiO-GDC nanocomposite powders could be synthesised at a lower temperature by the hydroxide reverse coprecipitation method, and the synthesised NiO-GDC nanocomposite powders had better sinterability. The NiO-GDC nanocomposite powders synthesised by the oxalate reverse coprecipitation method had a smaller particle size and uniform particle size distribution but crack formed in the sintered discs.