Etude de l'oxydation de l'oxyde de cobalt CoO en Co3O4 influence de la texture

Autor:	M. Figlarz, F. Fiévet-Vincent, D. Colaïtis, J. Guenot
Rok vydání:	1971
Předmět:	Materials science Mechanical Engineering Oxide Mineralogy Thermal treatment Condensed Matter Physics Degree (temperature) chemistry.chemical_compound Chemical engineering chemistry Mechanics of Materials General Materials Science Crystallite Porosity
Zdroj:	Materials Research Bulletin. 6:1211-1222
ISSN:	0025-5408
DOI:	10.1016/0025-5408(71)90057-2
Popis:	The oxidation of pulverulent CoO (ex Co(OH)2) into Co3O4 is a topotactic and pseudomorphic reaction. According to the degree of porosity and to the crystallite size of the original CoO oxide the reaction was found to proceed following two different mechanisms: monophasic or diphasic. From a textural point of view one must emphasize the following features: Co3O4 maintains the same porosity as the original CoO whereas the crystallite desorientation becomes more important. When this Co3O4 is submitted to a thermal treatment the porosity remains again identical; on the contrary, the crystallites are growing up.
Databáze:	OpenAIRE
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