【摘要】 以NiSO4.7H2O,Fe2(SO4)3和NH4HCO3为原料,在表面活性剂PEG-400存在下,先在室温下研磨反应混合物使其进行固相反应,然后用水洗去混合物中的可溶性无机盐后于80℃下烘干,即得纳米晶NiFe2O4前驱体。通过煅烧前驱体即得反尖晶石型NiFe2O4纳米晶产品。采用TG/DTA,IR,XRD和VSM对前驱体及其热解产品进行表征。结果表明,400℃下煅烧前驱体2h得到粒径约为17.2nm的反尖晶石型NiFe2O4纳米晶,其比饱和磁化强度为32.3emu/g。更多还原

【Abstract】 The nanocrystalline NiFe2O4 precursor is prepared with NiSO4·7H2O,Fe2(SO4)3 and NH4HCO3 as raw materials by grinding mixture in the presence of surfactant PEG-400 at room temperature,and washing mixture with water to remove soluble inorganic salts and drying at 80℃.The nanocrystalline NiFe2O4 with inverse spinel structure is obtained by calcining the precursor.The precursor and its calcined products are characterized by using TG/DTA,IR,XRD,and VSM.The results show that the inverse spinel nanocrystalline NiFe2O4 with 17.2nm in the size is obtained by calcining the precursor at 400℃ for 2h,and saturation magnetization is 32.3emu/g.更多还原