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...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Córdoba, Lucrecia M., Gómez, María Inés, Morán, Juana A. de, Aymonino, Pedro José
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2008
Materias:	Química thermal decomposition hexacyanoferrates(III) perovskites thermoanalytical studies
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/116692 https://www.aqa.org.ar/images/anales/pdf9612/9612art1.pdf
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

Descripción
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.