Cr_2O_3粉末在CaCl_2熔盐中直接电化学还原的金属通腔电极研究  

Investigation of the Direct Electrochemical Reduction of Cr_(2)O_(3) Powder in Molten CaCl_(2) by a Metallic Cavity Electrode

作　　者：邱国红[1] 汪的华[1] 金先波[1] 胡晓宏[1] 陈政[1] 

机构地区：[1]武汉大学化学与分子科学学院,湖北武汉430072

出　　处：《电化学》2006年第3期304-309,共6页Journal of Electrochemistry

基　　金：国家杰出青年科学基金(20125308);国家自然科学基金(20573081)资助

摘　　要：应用金属通腔电极研究Cr2O3粉末于熔盐中的电化学行为,验证了900℃下Cr2O3粉末在含镁量<0.005%氯化钙熔盐中的分步还原机理,估算其电化学还原动力学参数;并由扫描电镜观察产物形貌,分析电解电位和时间对金属颗粒尺寸的影响.A metallic cavity electrode is used for further investigation of the electrochemical bchaviour of Cr2O3 powder in molten CaCl2（Na： -0.02% by mass, Mg： 〈 0.005% by mass） at900℃. The Cr2O3 powder reduction mechanism was confirmed in line ucts. The correlations time were analysed. between the particle size with EDX and SEM analysis of the potentiostatic electrolysis products.The correlations between the particle size of metallised product and the electrolysis potential, or electrolysis time were analysed.

关 键 词：金属通腔电极 直接电化学还原 氧化铬粉末 循环伏安法 计时电流法 熔盐 

分 类 号：O646.5[理学—物理化学]