Self-propagating high-temperature synthesis of LaMO3 perovskite-type oxide using heteronuclearcyano metal complex precursors

JOURNAL OF ALLOYS AND COMPOUNDS

卷:649

Article

Sanchez-Rodriguez, Daniel¹  Wada, Hiroki²  Yamaguchi, Syuhei²  Farjas, Jordi¹  Yahiro, Hidenori² 

[1] Univ Girona, Dept Phys, GRMT, Girona, Catalonia, Spain

[2] Ehime Univ, Grad Sch Sci & Engn, Dept Mat Sci & Biotechnol, Matsuyama, Ehime 7908577, Japan

关键词: Combustion synthesis;    SHS;    Heteronuclearcyano complex;    Perovskite-type oxide;   

DOI  :  10.1016/j.jallcom.2015.07.246

来源: Elsevier

【 摘 要 】

The decomposition of La[Fe(CN)(6)]center dot 5H(2)O and La[Co(CN)(6)]center dot 5H(2)O under different atmospheres has been analyzed by thermogravimetry (TG) and differential thermal analysis (DTA). In addition, the decomposition temperature at different sample locations was monitored for sample masses around 2 g of La [Fe(CN)(6)]center dot 5H(2)O and La[Co(CN)(6)]center dot 5H(2)O, when they were calcined for 1 h at temperatures ranging from 200 to 400 degrees C in a controlled gas-flow system. Results showed that, the large enough of the cyano complex precursors undergo combustion when they are decomposed under oxygen atmosphere. X-ray diffraction results revealed that perovskite-type oxides crystallize due to the overheating of the process. As a result, it has been possible to produce LaFeO3 and LaCoO3 perovskite-type oxide powders by SHS under oxygen atmosphere using La[Fe(CN)(6)]center dot 5H(2)O and La[Co(CN)(6)]center dot 5H(2)O as a precursor. The effect of the ignition temperature has been investigated. The specific surface area of the perovskite-type oxides produced via SHS using heteronuclearcyano metal complex as a precursor is significantly higher than that of other LaMO3 produced using the same technique but obtained from other type of precursors. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

Free