用软锰矿直接制备高纯高比表面四氧化三锰

Preparation of High Purity and High Specific Surface Area Mn_3O_4 from Primary Manganese Ores

软锰矿经中性浸出,通过除杂净化,制备出高纯硫酸锰溶液;碱化沉淀,采用微波加热进行控制氧化合成四氧化三锰,确定了该方法的最佳工艺参数.分别用扫描电镜、透射电镜、X射线衍射仪和全自动氮吸附比表面仪对样品进行了检测,结果表明:该方法成功制备了高纯四氧化三锰,比表面积高达28.27m2/g.

Immerse primary Mn ores in neutral solution, purify chemically, and manganese sulphate with high purity are obtained. Making use of the selective heating property of microwave, Mn3O4 powder can be prepared controllably. The best technology conditions were established through experiments. The samples are characterized by SEM, TEM, XRD and BET. The results show that using this method, high quality Mn3O4 can be prepared successfully from primary Mn ores with a high specific surface area of 28. 27 m^2/g.