Fe_3O_4/坡缕石磁性复合材料的制备及其表征  

Preparation and Characterization of Fe_3O_4/Palygorskite Magnetic Composite

作　　者：王维清[1] 冯启明[1] 赵晓东[1] 

机构地区：[1]西南科技大学环境与资源学院,绵阳621010

出　　处：《非金属矿》2010年第1期21-23,共3页Non-Metallic Mines

基　　金：国家自然科学基金资助项目(项目编号:50804039)

摘　　要：先采用化学共沉淀法制备Fe3O4磁流体,再与坡缕石复合制备一系列不同Fe3O4质量百分含量的磁性坡缕石,并进行X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)、振动样品磁强计(VSM)等表征分析,测定了其磁分离回收率。结果表明,Fe3O4微粒附载于坡缕石表面,并与坡缕石相互聚集而成磁性团聚体;磁性坡缕石具超顺磁性,其磁分离回收率随Fe3O4载量增加而升高。Fe3O4载量为25%时,其饱和磁化强度(Ms)、剩余磁化强度(Mr)为15.371emu/g、0.561emu/g,矫顽力(Hc)为16.991G,磁分离回收率为98.5%。Magnetic influence of Fe3O4 was prepared by chemical coprecipitation method firstly, and then magnetic palygorskite with different loadings of Fe3O4 was prepared, the production was characterized by X-ray diffraction （XRD）, scanning electronic microscopy （SEM）, transmission electronic microscopy （TEM） and vibration sample magnetometer （VSM）, the magnetic recovery rate was also measured. The results show that Fe3O4 particles load on the surface of palygorskite particles or aggregate each other to form magnetic agglomerates. Magnetic palygorskite show well characteristic of superparamagnetism, and the magnetic recovery rate increases along with the loadings of Fe3O4 increasing. When the loading of Fe3O4 is 25%, the saturation magnetization （Ms） and remanence magnetization （Mt） of magnetic palygorskite is 15.371emu/g and 0.561emu/g, respectively. Coercive force （Hc） is 16.991 G; and magnetic recovery rate is 98.5%.

关 键 词：磁性坡缕石 磁性能 磁分离回收率 

分 类 号：TQ424.24[化学工程] O482.54[一般工业技术—材料科学与工程]