INFIQC 05475
INSTITUTO DE INVESTIGACIONES EN FISICO- QUIMICA DE CORDOBA
Unidad Ejecutora - UE
artículos
Título:
Metal/oxide Composites: Mechanisms of the Formation from the Thermal Decomposition of LaNi5
Autor/es:
TORRESAN, MA. FERNANDA; MOGNI, LILIANA; ESQUIVEL, MARCELO R.
Revista:
Procedia Materials Science
Editorial:
Elsevier
Referencias:
Año: 2015 vol. 8 p. 1108 - 1117
ISSN:
2211-8128
Resumen:
The formation of metal/oxide composites from the thermal decomposition of LaNi5 is analyzed by TG and DSC between roomtemperature and 700 ºC. The reaction products are characterized by XRD, SEM and EDS. Based on the results obtained, thefollowing global mechanisms are proposed:For temperature range between 160 ºC and 600 ºC2LaNi5 + 13/2O2 o La2O3 + 10NiO (1)For temperature range higher than 600 ºC, two mechanisms were proposed as presented for each following equation:LaNi5 + 7/2O2 o LaNiO3 + 4NiO (2)2LaNi5 + 7/2O2 o La2O3 + Ni o La2O3 + NiO o LaNiO3 + 10NiO (3)The conditions that promote the formation of metal/oxide composites are discussed according to these results.
