engleski

Coprecipitation of copper/zinc compounds in metal salt-urea-water system

A study of composite and structural changes of particles prepared by coprecipitation in solution of Cu2+ and Zn2+ salts at different starting molar ratios of the corresponding nitrates (4:1, 2:1, 1:1, 1:2, 1:4) in the presence of urea is described. The effects of the initial concentration ratios and the aging time on the finaql product were discussed in some detail. The final solids were characterized by SEM-EDS, XRD. On ageing at 85 oC, the change from initially amorphous particles to crystalline structure takes place and the results depend on the metal ratio used.

Coprecipitation; Spectroscopy; X-ray methods; Grain-size; Nanocomposites

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