反应型纳米级磁核聚烯烃类磁性材料的研究——(Ⅳ)纳米级NdxFe_(3-x)O_4磁性载体的制备和性能研究

Studies on the Magnetic Polyolefim with Nanometer Magnetic Dispersing Phase IV. Studies on Preparation and Properties of NdxFe3_xO4 Nanocrystalline Magnetic Carrier

用化学共沉淀法合成出平均粒径在40-50nm的NdxFc_(3-x)O_4纳米晶,用TEM和PSD及XRD分析其结构、粒径和形貌.用磁天平和交流性自动测量仪研究其磁性能.结果表明,NdxFc_(3-x)O_4纳米晶是尖晶石结构,晶粒为立方形.比饱和磁化强度虽比相同制备条件下的Fe_3O_4略小,但矫顽力比Fe_3O_4高50%左右.

Nanocrystalline magnetic carrier NdxFe3-xO4 have been prepared by chemical coprecipitation. Their structure and morphology were examined by the submicron particle size distribution analyzer, transmission electron microscopy and x- ray diffraction. It was shown that prepared samples have spinel crystal and are cuboidal which particel sizes are 40 -50nm. Magnetic properties were measured by magnetic balance and magnetic measurer automatic. It was found that saturation magnetization as little more then pure Fe3O4 and magnetic properties He high 50% then pure Fe3O4.