Synthesis of the SrFeO<SUB>2.5</SUB> and BaFeO<SUB>3-x</SUB> perovskites by thermal decomposition of SrNh<SUB>4</SUB>[Fe(Cn)<SUB>6</SUB>] 3H<SUB>2</SUB>O and BaNh<SUB>4</SUB>[Fe(Cn)<SUB>6</SUB>]
In the present work the synthesis, physicochemical characterization and thermoanalytical results of SrNh<SUB>4</SUB>[Fe(Cn)<SUB>6</SUB>] 3H<SUB>2</SUB>Oy BaNh<SUB>4</SUB>[Fe(Cn)<SUB>6</SUB>] are described. The thermal decompositions in oxyg...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2008 |
| País: | Argentina |
| Institución: | Universidad Nacional de La Plata |
| Repositorio: | SEDICI (UNLP) |
| Idioma: | inglés |
| OAI Identifier: | oai:sedici.unlp.edu.ar:10915/116692 |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/116692 |
| Access Level: | acceso abierto |
| Palabra clave: | Química thermal decomposition hexacyanoferrates(III) perovskites thermoanalytical studies |
| Sumario: | In the present work the synthesis, physicochemical characterization and thermoanalytical results of SrNh<SUB>4</SUB>[Fe(Cn)<SUB>6</SUB>] 3H<SUB>2</SUB>Oy BaNh<SUB>4</SUB>[Fe(Cn)<SUB>6</SUB>] are described. The thermal decompositions in oxygen atmosphere for both salts are carried out in the stages that lead to the formation of mixed oxides, i. e., SrFeO2.5 and BaFeO3-x at 1173 K. Barium carbonate is also obtained in the residue in the case of the decomposition of the barium complex. The total weight loss are 49,95% and 35,45 % for the strontium and barium salts, respectively. A decomposition mechanism is suggested for the pyrolisis processes from the data provided by IR spectroscopy, X-ray powder diffraction and chemical analysis. The specific surface area of the obtained oxides is also determined in order to evaluate its eventual catalytic activity. |
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