Low-temperature synthesis of La0.6Sr0.4Co0.2Fe0.8O3-delta perovskite powder via asymmetric sol-gel process and catalytic auto-combustion

Ge, Lei, Ran, Ran, Shao, Zongping, Zhu, Zhong Hua and Liu, Shaomin (2009) Low-temperature synthesis of La0.6Sr0.4Co0.2Fe0.8O3-delta perovskite powder via asymmetric sol-gel process and catalytic auto-combustion. Ceramics International, 35 7: 2809-2815. doi:10.1016/j.ceramint.2009.03.018


Author Ge, Lei
Ran, Ran
Shao, Zongping
Zhu, Zhong Hua
Liu, Shaomin
Title Low-temperature synthesis of La0.6Sr0.4Co0.2Fe0.8O3-delta perovskite powder via asymmetric sol-gel process and catalytic auto-combustion
Formatted title
Low-temperature synthesis of La0.6Sr0.4Co0.2Fe0.8O3-δ perovskite powder via asymmetric sol-gel process and catalytic auto-combustion
Journal name Ceramics International   Check publisher's open access policy
ISSN 0272-8842
1873-3956
Publication date 2009-09-01
Year available 2009
Sub-type Article (original research)
DOI 10.1016/j.ceramint.2009.03.018
Volume 35
Issue 7
Start page 2809
End page 2815
Total pages 7
Place of publication Oxford, U.K.
Publisher Pergamon
Collection year 2010
Language eng
Subject C1
090499 Chemical Engineering not elsewhere classified
970109 Expanding Knowledge in Engineering
Formatted abstract
La0.6Sr0.4Co0.2Fe0.8O3−δ powder was synthesized by a combined EDTA-citrate complexing process via low-temperature auto-combustion synthesis with NH4NO3 as an oxidizer and a combustion trigger. Two novel methods were explored to improve this auto-combustion technology with reduced NH4NO3 addition: the use of La0.6Sr0.4Co0.2Fe0.8O3−δ as the combustion catalyst and the application of asymmetric sol–gel process to provide the precursor with different NH4NO3 concentrations. The prepared perovskite powder was characterized by BET, SEM, XRD and iodometric titration techniques. The catalytic performance of the powder was also examined in the decomposition of peroxide hydrogen. Experimental results indicate that powders from catalytic combustion and asymmetric precursor routes have more advantages in terms of better crystallites, higher specific surface area, higher B-site valence state, improved sintering capability and better catalytic performance in peroxide hydrogen decomposition than that from the synthesis with uniform NH4NO3 distribution.
Keyword Asymmetry
Auto-combustion synthesis
Catalysis
Ceramic powder
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
School of Chemical Engineering Publications
ERA 2012 Admin Only
 
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Created: Fri, 04 Sep 2009, 20:25:09 EST