10T强磁场下低温中和法沉淀锰（Ⅱ）离子的研究

Research on sediment of manganese （ Ⅱ ） ion by low-temperature neutralization method in 10T high magnetic field

利用XRD和TEM分别对无磁场和10T强磁场下低温中和法沉淀锰（Ⅱ）离子的沉淀物进行了分析，结果表明：无磁场下，锰（Ⅱ）离子的沉淀物主要是由颗粒状和短棒状的Mn（OH）2组成，随着陈化时间的延长，Mn（OH）2被空气中的氧气氧化为颗粒状的MnOOH，其粒度分布不均匀。10T强磁场下短时间内，强磁场加速了Mn（OH）2向MnOOH转变，并且制备出了30nm左右的颗粒状MnOOH，其粒度分布均匀。随着陈化时间的延长，物相几乎没有发生变化，但是MnOOH颗粒有所长大，其粒度也出现了不均匀分布。此外，10T强磁场对MnOOH晶化程度几乎没有影响。

The sediments of manganese （ Ⅱ ） ion, which were prepared in zero magnetic field and 10T high magnetic field by low-temperature neutralization method respectively, were characterized with XRD and TEM. The results turned out that： In zero magnetic field, the sediments were made up of Mn （OH） 2 particle and claviform Mn （OH） 2 after ageing time for 90 min, and Mn （OH）2 was oxidized into MnOOH after ageing time for 180 min, the grain size distribution of which was not homogeneous. In 10T high magnetic field, Mn （OH）2 was transformed into about 30nm MnOOH after ageing time for 90min, the grain size distribution of which was homogeneous, and the grain size of MnOOH particles, the grain size distribution of which was not homogeneous at the same time, grew up after ageing time for 180min. In addition, the crystallinity of MnOOH was hardly influenced by 10T high magnetic field.