电解锰渣制备SiO_2掺杂锰锌铁氧体

Preparation of SiO_2 Doped Mn-Zn Ferrite from Electrolytic Manganese Residue

本文以电解锰渣为原料,经酸浸、除杂后,采用化学共沉淀法结合高温焙烧法制备了锰锌铁氧体磁粉。通过改变反应温度,研究了共沉淀温度对锰锌铁氧体前驱体合成率的影响。分别用XRD、BET以及VSM对掺杂样品的晶粒结构、比表面积以及磁性能进行了表征。结果表明,当温度为50℃时前驱体合成率最高,达到87.9%;适当的SiO2掺杂可以提高样品的比表面积,当掺杂量为0.45%时,样品的磁性能最佳,其饱和磁化强度为71.95 emu/g,矫顽力为10.49 G,剩余饱和磁化强度为1.32 emu/g。

Mn-Zn ferrite powders have been produced from Electrolytic Manganese Residue （EMR） via chemical co-precipitation method combined with ceramic method after leaching EMR in sulfuric acid and purifying the obtained solution. The effect of temperature on synthesis ratio of precursor was studied. The crystalline phases and the specific surface area of the SiO2-doped samples were characterized respectively by X-ray diffraction （XRD） and Specific-surface-area Instrument of Brunauer-Emmett-Teller （BET）. In addition, the magnetic measurements were carried out on vibrating sample magnetometer （VSM）. The results showed that synthesis ratio of precursor can reached up to 87.9% at the temperature of 50 ~C. Specific surface area of the Mn-Zn Ferrite samples were significantly improved with SiO2 doping. The optimal sample was obtained with a saturation magnetization of 71.95 emu/g, a coercivity of 10.49 G and a remanent magnetization of 1.32 emu/g when SiO2 doped was 0.45%.