Facile autocombustion synthesis of La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) perovskite via a modified complexing sol–gel process with NH4NO3 as combustion aid

Ge, Lei and Zhou, Wei and Ran, Ran and Shao, Zongping and Liu, Shaomin (2008) Facile autocombustion synthesis of La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) perovskite via a modified complexing sol–gel process with NH4NO3 as combustion aid. Journal of Alloys and Compounds , 450 (1). pp. 338-347. ISSN 0925-8388

Abstract

Ammonia nitrate was applied as an oxidizer and combustion trigger to modify the normal combined EDTA-citrate complexing method into a process with autocombustion and low ignition temperature properties. Therefore, the synthesis procedure was greatly simplified. The effect of NH4NO3/metal ions to organic mole ratios and the heating temperature on the autocombustion behavior and the properties of the powders derived were investigated in detail. The critical amount of NH4NO3 for the autocombustion to occur was identified at the NO3- to citric acid to EDTA mole ratio of around 10:2:1. After the experimental optimization, well-crystallized nanostructured La0.6Sr0.4Co0.2Fe0.8O3- δ (LSCF) powder with a specific surface area as high as 21 m2/g was obtained; it is comparable with that obtained from a normal complexing process. By adjusting the combustion parameters, the properties of the powders then derived can be tailored for different applications, such as nanograined dense membrane for oxygen separation membrane, and porous cathode for fuel cells and sensors.


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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
Date Deposited: 07 Aug 2019 01:53
Last Modified: 09 Aug 2019 04:53
Uncontrolled Keywords: nanofabrication, oxide materials, sol–gel processes, chemical synthesis
Fields of Research : 03 Chemical Sciences > 0302 Inorganic Chemistry > 030206 Solid State Chemistry
09 Engineering > 0904 Chemical Engineering > 090404 Membrane and Separation Technologies
Socio-Economic Objective: B Economic Development > 86 Manufacturing > 8610 Ceramics, Glass and Industrial Mineral Products > 861002 Ceramics
Identification Number or DOI: 10.1016/j.jallcom.2006.10.142
URI: http://eprints.usq.edu.au/id/eprint/36468

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