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A sol-gel method has been applied to synthesize Ca3Co4O9 powders by using calcium and cobalt nitrates as raw materials and citric acid as complexing agent. The Pyrolytic decomposition mechanism of the dried gel and formation process of Ca3Co4O9 were investigated by TG-DTA, XRD, FT-IR, SEM and TEM. The results show pure Ca3CO4O9 powders can be prepared after the dried gel was calcined at 750-900 degrees C for 2 h. 2% of polyethylene glycol (PEG) 400 as a dispersant was added to the nitrate solution during the formation of sol precursor. Ca3Co4O9 nanoparticles with a size of 30-50 nm can be obtained by the dried gel synthesized in the presence of PEG 400 calcined at 800 degrees C for 2 h. (c) 2006 Elsevier B.V. All rights reserved.
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MATERIALS LETTERS
ISSN： 0167-577X
Year： 2006
Issue： 20
Volume： 60
Page： 2443-2446
3 . 0 0 0
JCR@2022
ESI Discipline： MATERIALS SCIENCE;
JCR Journal Grade：2
Cited Count：
WoS CC Cited Count： 76
SCOPUS Cited Count： 93
ESI Highly Cited Papers on the List： 0 Unfold All
WanFang Cited Count：
Chinese Cited Count：
30 Days PV： 10
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