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

Ge, Lei and Ran, Ran and Shao, Zongping and Zhu, Zhonghua and Liu, Shaomin (2009) Low-temperature synthesis of La0.6Sr0.4Co0.2Fe0.8O3−δ perovskite powder via asymmetric sol–gel process and catalytic auto-combustion. Ceramics International, 35 (7). pp. 2809-2815. ISSN 0272-8842

Abstract

La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ powder was synthesized by a combined EDTA-citrate complexing process via low-temperature auto-combustion synthesis with NH 4 NO 3 as an oxidizer and a combustion trigger. Two novel methods were explored to improve this auto-combustion technology with reduced NH 4 NO 3 addition: the use of La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ as the combustion catalyst and the application of asymmetric sol-gel process to provide the precursor with different NH 4 NO 3 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 NH 4 NO 3 distribution.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 07 Aug 2019 22:23
Last Modified: 09 Aug 2019 04:55
Uncontrolled Keywords: ceramic powder, auto-combustion, synthesis, asymmetry, catalysis
Fields of Research : 03 Chemical Sciences > 0302 Inorganic Chemistry > 030206 Solid State Chemistry
09 Engineering > 0904 Chemical Engineering > 090406 Powder and Particle Technology
Socio-Economic Objective: B Economic Development > 86 Manufacturing > 8610 Ceramics, Glass and Industrial Mineral Products > 861002 Ceramics
Identification Number or DOI: 10.1016/j.ceramint.2009.03.018
URI: http://eprints.usq.edu.au/id/eprint/36471

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