钕铁硼废渣制备锰锌铁氧体  

Preparation of Mn-Zn Ferrites from NdFeB Waste

作　　者：宋宁[1] 钟晓林 姜宏伟[1] 严玉环[1] 

机构地区：[1]昆明理工大学材料与冶金工程学院真空冶金国家工程实验室,昆明650093 [2]赣州虔东实业(集团)有限公司,赣州341001

出　　处：《材料导报》2008年第4期146-148,155,共4页Materials Reports

基　　金：云南省戴永年院士突出贡献奖资助项目

摘　　要：研究了钕铁硼废渣制备锰锌铁氧体。以MnSO4·H2O、ZnSO4·7H2O、NH4HCO3、NH3·H2O和提取稀土后的钕铁硼二次废渣经H2SO4浸出除杂3次重结晶后得到的FeSO4·7H2O等为原料,采用化学共沉淀法、微波干燥、煅烧、烧结等工序制备锰锌铁氧体。通过TG-DTA、XRD、TEM、ICP-AES等系列现代分析手段对产物结构、形貌和纯度进行检测和表征。实验结果表明:前驱体在800℃下煅烧2h得到尖晶石相含量在40%以上、粒度为0.4μm、颗粒大小均匀、呈球形的锰锌铁氧体微粉,微粉经造粒、压坯,在1300℃烧结5h后得到晶粒大、气孔较少的锰锌铁氧体。In this paper,the perparation of MnZn ferrites from NdFeB waste is studied. Using the raw materials of MnSO4·H2O、ZnSO4·7H2O、NH4HCO3、NH3·H2O and ZnSO4·7H2Oetc, Mn -Zn ferrites are obtained by the method of the chemical co-precipitation, microwave drying, calcinin and sintering. With the modem analysis methods of TG-DTA, XRD, SEM, TEM ICP-AES etc, the confinuration, constitution, particle size, and puffy of the prepared Mn-Zn ferrite are tested and characterized. The experimental result shows that after the precursor is calcined at 800℃ for 2h,Mn-Zn ferrie powdes are obtained. The powders have more than 40 % content of spinel phase. The size of the powders is 0,4μm, and the particles are u- niform and have the shape of spheroid. After granulation, molding and sintering at 1300℃ for 5h, the Mn-Zn ferrites with big grain size and a few pores can be got.

关 键 词：钕铁硼废渣 浸出 共沉淀法 烧结 锰锌铁氧体 

分 类 号：TQ586.1[化学工程—精细化工] TM277.1[一般工业技术—材料科学与工程]