View in EDS

Cation order enhancement in Sr2FeMoO6 by water-saturated hydrogen reduction

Saved in:
Bibliographic Details
Title: Cation order enhancement in Sr2FeMoO6 by water-saturated hydrogen reduction
Authors: Calleja, Alberto1,2 acalleja@icmab.es, Capdevila, Xavier G.3, Segarra, Mercè3, Frontera, Carles1, Espiell, Ferran3
Source: Journal of the European Ceramic Society. Jan2011, Vol. 31 Issue 1/2, p121-127. 7p.
Subjects: Strontium, Perovskite, Cations, Rietveld refinement, Curie temperature, Ferric oxide, Microstructure, Magnetic properties, Chemical reduction
Abstract: Abstract: Sr2FeMoO6 (SFMO) double perovskite has been prepared from powders obtained by the polyacrylamide gel combustion synthesis. After removing organic residues, the precursor powder consists of a homogeneous submicronic blend of SrFeO3−x and SrMoO4. In order to crystallize SFMO an experimental setup consisting of injecting water-saturated Ar/5%H2 gas flow in a crucible was used. Results show that a high saturation magnetization of 3.9μ B/formula unit, which accounts for 98% of the theoretical value, and Curie temperature of 415K can be achieved in this way. The Fe/Mo order was 98% by Rietveld refinement of best sample. Furthermore, no metallic iron was detected, even at long reducing treatments. Lowering the reducing power of hydrogen with water is believed to be the main reason for improved synthesis. [ABSTRACT FROM AUTHOR]
Copyright of Journal of the European Ceramic Society is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:Abstract: Sr2FeMoO6 (SFMO) double perovskite has been prepared from powders obtained by the polyacrylamide gel combustion synthesis. After removing organic residues, the precursor powder consists of a homogeneous submicronic blend of SrFeO3−x and SrMoO4. In order to crystallize SFMO an experimental setup consisting of injecting water-saturated Ar/5%H2 gas flow in a crucible was used. Results show that a high saturation magnetization of 3.9μ B/formula unit, which accounts for 98% of the theoretical value, and Curie temperature of 415K can be achieved in this way. The Fe/Mo order was 98% by Rietveld refinement of best sample. Furthermore, no metallic iron was detected, even at long reducing treatments. Lowering the reducing power of hydrogen with water is believed to be the main reason for improved synthesis. [ABSTRACT FROM AUTHOR]
ISSN:09552219
DOI:10.1016/j.jeurceramsoc.2010.08.002