J. Phys. IV France 11 (2001) Pr10-99-Pr10-102
The Ca0.80CuO1.93 phase : New way of synthesis by the sol-gel methodS. Phok1, T.K. Jondo2, Ph. Galez1 and J.L. Jorda1
1 LAIMAM, Université de Savoie, 9 rue de l'Arc-en-Ciel, BP. 240, 74942 Annecy-le-Vieux cedex, France
2 Université du Bénin, BP. 418, Lomé, Togo
We report on the reaction kinetics for the Ca0.80CuO1.93 phase prepared by the sol-gel method using acrylamide for gelification. The phase was prepared 95% pure after a 2 hour treatment at 800°C. Comparative stability under vacuum and oxygen has been determined. The kinetics parameters for the decomposition have been established : the activation energy is Ea= 626 kJ/mol and the pseudo reaction order n = 0.5.
© EDP Sciences 2001