INVESTIGADORES
BOHE Ana Ester
artículos
Título:
A thermogravimetric study of copper chlorination
Autor/es:
GEORGINA DE MICCO; ANA ESTER BOHÉ; DANIEL MIGUEL PASQUEVICH
Revista:
JOURNAL OF ALLOYS AND COMPOUNDS
Editorial:
K. H. J. Buschow-ELSEVIER
Referencias:
Año: 2007 vol. 437 p. 351 - 359
ISSN:
0925-8388
Resumen:
The chlorination of metallic copper has been studied by thermogravimetry in the range of temperatures between 100 and 800 C. The starting
temperature for the reaction of copper with chlorine is determined at about 150 C by non-isothermal measurements. For temperatures above
400 C a methodology of heating in argon has been applied to decouple two processes taking place: decomposition of CuCl2 and volatilization
of CuCl. These experiments allow to determine the amounts of CuCl, CuCl2 and Cu3Cl3(g) formed at each temperature. The activation energies
for volatilization are obtained in chlorine and argon atmospheres. Finally, for temperatures below 250 C the amounts of CuCl and CuCl2 formed
are calculated with mass balances. Observations in scanning electron microscopy (SEM) reveal that the different chlorides are formed in layers. A
possible mechanism for the low temperature reaction is presented.
