废旧碱性电池共沉淀法制备锰锌铁氧体的研究

Study on Preparation of Manganese-zinc Ferrites by Co-precipitation Method Using Spent Alkaline Zn-Mn Batteries

以硫酸溶解废旧碱性锌锰电池所得溶液为原料，用NH4HCO3与NH3·H2O组成沉淀剂，采用并加共沉淀法制备出锰锌铁氧体。借助于原子吸收分光光度计对沉淀条件进行优化；借助于XRD、IR等手段对产物组成晶型进行检测；借助于SEM及TEM等手段对产物形貌进行表征；借助于振动样品磁强计对产物磁性能进行检测，并对产物组成进行优化。结果表明：共沉淀的适宜条件为T=50-55℃、pH=6．5，7．5；煅烧温度为1130-1160℃、煅烧时间为2h；产物最佳组成为Mn0.6Zo0.4Fe2O4；其肜状近似为球形、具有粒径小、分散均匀、磁性能优良等特点。

The powder of Mn-Zn ferrite was systhesized by co-precipition method using spent alkaline Zn- Mn batteries dissolved in the sulfuric acid solution. The influential factors on the power preparing process, including co-precipition pH value, co-precipition temperature and calcining temperature were studied. The phase structure and magmetic properties of Mn-Zn ferrite powders obtained were investigated by XRD, IR, SEM, TEM and VSM techniques. The results show that the suitable preparing conditions are co-precipition temperature, 50-55℃ ; co-precipition pH value, 6.5-7.5 ; calcining temperature, 1130-1160℃. It also shows that the powder of Mn0.6Zn0.4Fe2O4 ferrite is basically in spherical shape, small in grain size and homogenous dispersion.