Showing papers on "Chromium(III) oxide published in 1992"

Process for converting chromium dioxide magnetic pigment particles into nonmagnetic chromium (III) oxide

Abstract: According to a process for converting chromium dioxide into chromium (III) oxide, a composite comprising chromium dioxide particles dispersed in an organic matrix is provided. In a first heating step, a feed consisting essentially of the composite is heated under conditions sufficient to convert the feed into an admixture comprising chromium oxide and carbon. In a second heating step, the admixture is heated under conditions such that substantially all of the chromium oxide in the admixture is converted into chromium (III) oxide. In preferred embodiments, the composite is a chromium dioxide-based magnetic recording medium.