✦ LIBER ✦

Synthesis of nanometric chromium (III) oxide powders in supercritical alcohol

✍ Scribed by L. Znaidi; C. Pommier

Publisher: Elsevier Science
Year: 1998
Tongue: English
Weight: 717 KB
Volume: 35
Category: Article
ISSN: 0992-4361
DOI: 10.1016/s0992-4361(98)80019-2

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✦ Synopsis

A new semi-continuous process has been developed for the synthesis of Cr20, powders starting with Cr(III) acetylacetonate or acetate hydroxide dissolved in methanol. The precursor is first decomposed in the solvent under superc&ical state (T = 325 to 450 'C, P = 10 MPa) aud the formed solid is dried under either nitrogen or air flow. For various reaction temperatures aud drying conditions, nanometric particles of pure amorphous or crystalline Cr$& powders are obtained with surface area between 350 and 30 m*.g-' according to their crystallization state.

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