北京科技大学学报2011，Vol.33Issue(9)：1127-1132,6.
Fe2O3转变为Fe3O4粉末的微波碳热还原
Microwave carbothermic reduction from Fe2O3 to Fe3O4 powders
摘要
Abstract
A microwave carbothermal reduction process of weakly magnetic Fe2O3 powders to ferromagnetic Fe3O4 powders was experimentally studied with argon gas as a protective gas and activated carbon as a reduetant. The influences of roasting temperature, holding time and SiO2 addition on the ingredients of reduced resultants and the magnetization effect of Fe2O3 powders were discussed. Under quantificational carbon, roasting temperature is a key factor of the microwave carbothermal reduction. The content of Fe3O4 in reduced resultants regularly changed with the roasting temperature increasing. Pure Fe3O4 powders were made at a roasting temperature of 650 ℃ for a holding time of 5 min, and their magnetisability and percent reduction reach the theoretical values of 2.33 and 11.11% , respectively. Above the roasting temperature of 750 ℃ , a plenty of FeSiO4 and FeO formed in reduced resultants after the microwave carbothermal reduction of Fe2O3 powders containing SiO2 , making Fe3O4 in reaction resultants decrease and the magnetization effect worsen. It is concluded that the best boasting temperature of Fe2O3 powders is from 570 ℃ to 650 ℃.关键词
铁磁材料/微波加热/碳热还原Key words
ferromagnetic materials/microwave heating/carbothcrmal reduction分类
化学工程引用本文复制引用
李解,李保卫,张邦文..Fe2O3转变为Fe3O4粉末的微波碳热还原[J].北京科技大学学报,2011,33(9):1127-1132,6.基金项目
国家自然科学基金资助项目 （）
