| Revista: | Brazilian journal of chemical engineering |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000308618 |
| ISSN: | 0104-6632 |
| Autors: | Favotto, C1 Satre, P L'Honore, A1 Souza, C.P2 Roubin, M |
| Institucions: | 1Universite de Toulon, Laboratoire de Physicochimie du Materiaux et du Milieu Marin, La Garde, Var. Francia 2Universidade Federal do Rio Grande do Norte, Departamento de Engenharia Quimica, Natal, Rio Grande do Norte. Brasil |
| Any: | 1999 |
| Període: | Mar |
| Volum: | 16 |
| Número: | 1 |
| Paginació: | 1-6 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental |
| Resumen en inglés | In this work we have synthesized an organometallic oxalic precursor from tantalum oxide. This oxide was solubilized by heating with potassium hydrogen sulfate. In order to precipitate Ta2O5.nH2O, the fused mass obtained was dissolved in a sulfuric acid solution and neutralized with ammonia. The hydrated tantalum oxide precipitated was dissolved in an equimolar solution of oxalic acid/ammonium oxalate. The synthesis and the characterization of the tantalum oxalic precursor are described. Pyrolysis of the complex in a mixture of hydrogen and methane at atmospheric pressure was studied. The gas-solid reaction made it possible to obtain tantalum carbide, TaC, in the powder form at 1000oC. The natural sintering of TaC powder in an inert atmosphere at 1400°C during 10 hours, under inert atmosphere made it possible to densify the carbide to 96% of the theoretical value |
| Disciplines | Química |
| Paraules clau: | Química organometálica, Síntesis química, Carburo de tantalio, Precursores químicos |
| Keyword: | Chemistry, Organometallic chemistry, Chemical synthesis, Tantalum carbide, Chemical precursors |
| Text complet: | Texto completo (Ver HTML) |
