化学共沉淀法制备Y型平面六角铁氧体粉体及其磁性能

使用化学共沉淀法制备了Y型平面六角铁氧体粉体.用XRD、SEM、LPS(激光粒度分析仪)对制备粉料的物相、形貌和粒度进行了表征,并结合热重与差热扫描分析(TG-DSC曲线)对粉料的烧结过程进行了研究.采用振动样品磁强计、HP4291A型阻抗分析仪测试样品的磁性能.结果表明:在pH=10±0.1,盐溶液流速为2 mL/min,转速为1 000 r/min的共沉淀实验条件下制备出了颗粒细小均匀的铁氧体前驱体粉料,在1 000℃下预烧后形成纯相Y型平面六角铁氧体,对样品的磁性能测试显示出良好的软磁性能:矫顽力HC≈43.64 Oe,比饱和磁化强度σS≈26.67 emu/g,剩余比磁化强度σr≈6.23 emu/g.

Preparation and Magnetic Properties of Y Type Hexaferrite Powder by Co-Precipitation

The Y type hexaferrite powder synthesized by co -precipitation is studied by X -ray diffraction （XRD）, scanning electron microscope （SEM） and Laser particle size analyzer. The sintered process is researched by thermo -gravimetry and differential scanning calorimeter. The vibrating sample magnetometer （VSM） and HP4291A impedance analyzer are used to investigate the magnetic properties. Experimental results show that the Y type hexaferrite powder with uniformity granularity is obtained at pH = 10 ＋0.1, with the flow speed of metal ions solution being 2 mL/min and the rotate speed being 1 000 r/min. After being pre - sintered at 1 000 ℃, the Y type hexaferrite is formed with good magnetic properties. The specific saturation magnetization, coercive force and retentive magnetism of the sample are 26. 67 emu/g, 43.64 Oe, and 6. 23 emu/g respectively.