IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Grain growth of CuO nanocrystal activated by High energy ball milling
Autor/es:
A. E. BIANCHI; S. J. STEWART; G. PUNTE; R. VINA; T. S. PLIVELIC; I. TORRIANI
Revista:
PHYSICA B - Condensed Matter
Editorial:
Elsevier
Referencias:
Año: 2006 p. 1 - 1
ISSN:
0921-4526
Resumen:
X-ray Diffraction (XRD), small-angle X-ray scattering, scanning electron microscopy and energy dispersive X-ray Analysis were used to investigate the effect of controlled high energy ball milling (HEBM) on the average volume weighted crystallite size, /DSV and weighted average microstrain, /eS, of nanostructures of CuO prepared by solid state reaction. The starting material, S0, consists of almost strain free nanocrystals of monoclinic CuO with /DSV E20nm , as determined by XRD data Rietveld analysis. It was found that after an initial decrease of /DSV and increase of /eS, the values of these parameters go through a steady-state stage followed by an increase of an order of magnitude in /DS after a period of only 120m of HEBM. According to the results here presented, the presence of small amounts of contaminants in the starting material can have an in.uence on the kinetics of crystal growth in HEBM CuO.