【摘 要】
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As a part of the green process for manufacturing chromium compounds,two steps are involved in the synthesis of ultra-fine Cr_2O_3 powders:the first is the hydro
【出 处】
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Journal of Wuhan University of Technology(Materials Science
论文部分内容阅读
As a part of the green process for manufacturing chromium compounds,two steps are involved in the synthesis of ultra-fine Cr_2O_3 powders:the first is the hydrogen reduction of K_2CrO_4 into intermediate trivalent(Cr~(3+))or tetravalent(Cr~(4+))chromium compounds;the second is the decomposing of the intermediate into Cr_2O_3 by heat treating.The intermediate is well characterized by means of SEM,XRD,and XPS.The possible reaction mechanism of the process is analyzed.
As a part of the green process for manufacturing chromium compounds, two steps are involved in the synthesis of ultra-fine Cr 2 O 3 powders: the first is the hydrogen reduction of K_2CrO_4 into intermediate trivalent (Cr ~ (3 +)) or tetravalent (Cr ~ (4 +)) chromium compounds; the second is the decomposing of the intermediate into Cr 2 O 3 by heat treating. The intermediate is well characterized by means of SEM, XRD, and XPS. The possible reaction mechanism of the process is analyzed.
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