钡铁氧体包覆空心玻璃微珠的制备与磁性能研究

Preparation and magnetic property of BaFe_(12)O_(19) coated hollow glass microspheres

以硝酸钡、硝酸铁和柠檬酸为原料,使用溶胶-凝胶自蔓延法,在空心玻璃微珠(HGM)表面均匀包覆上钡铁氧体(BaFe12O19)涂层。采用扫描电子显微镜(SEM)、能谱分析(EDS)、X射线衍射仪(XRD)和振动样品磁强计(VSM)对BaFe12O19/HGM复合颗粒进行表面观察、组分测定和磁性能表征。结果表明:经过表面处理的空心玻璃微珠表面光滑,BaFe12O19涂层均匀连续,镀层厚度小于1μm;BaFe12O19/HGM复合颗粒具有良好的磁性能,饱和磁化强度(Ms)为27.07emu/g,剩磁强度(Mr)为15.82emu/g,矫顽力(H)为4706.89Oe。

With barium nitrate,ferric nitrate and citric acid as raw materials,by using sol-gel self-propagating meth- od, barium ferrite （BaFelz O19 ） was coated on the surface of hollow glass microspheres （HGM） uniformly. The morphology and performance of BaFelz O19/HGM composite particles were characterized by canning electron microscopy （SEM）, energy spectrum analysis （EDS）,X-ray diffraction （XRD） and vibrating sample magnetometer （VSM）. The results showed that BaFe12 O19 coated on the surface of hollow glass microspheres was continuous and uniform , the coating thickness was less than l ktm,and the particles had good magnetic properties, the saturation magnetization （Ms） was 27.07 emu/g, remanent magnetization （Mr） was 15.82 emu/g,and coercive force （H） was 4706.89 Oe.