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Preparation of Cr_2O_3 fine powder by solid-phase reaction

ZHANG Xi jun Yuan Wei (College of Science, Beijing University of Chemical Technology, Beijing 100029, China)  
The preparation of Cr 2O 3 fine powder by calcining CrO 3 was reported. The effects of the temperature, time and the additives including the borate, oxides, dichromate and the combustible powder were researched. Under the conditions of 700 ℃ and 90 minutes, when 2%~3% of the combustible powder and the adequate water were added, it showed that the size of Cr 2O 3 powder was about 200 nm and its dispersivity was good.
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