【摘要】 以醋酸镍、醋酸钴为原料,尿素为沉淀剂,采用均相沉淀法合成了纯的尖晶石型链状纳米NiCo2O4(F),其结构和性能经XRD,SEM,TEM和振动样品磁强计(VSM)表征。研究了分散剂聚乙二醇对F结构、形貌及磁性能的影响。结果表明:350℃煅烧6 h可以得到单相F;未加入PEG-600时F的组成粒径为15 nm,链长为150 nm;加入PEG-600后F粒径减小至9 nm,链长增加至220 nm;F的剩磁和矫顽力都趋近于零,呈现超顺磁性,加入PEG后F的饱和磁化强度明显提高。更多还原

【Abstract】 The spinel-type NiCo2O4(F) with nanochain structure was prepared via homogeneous precipitation method from Co(CH3COO)2·4H2O and Ni(CH3COO)2·4H2O,using urea as the precipitator and polyethylene glycol 600(PEG 600) as the disperser.The structure was characterized by XRD,SEM,TEM and VSM.The effect of PEG on the structure,morphology and magnetic properties of F were investigated.The results showed that the precursor can be transformed into single-phase F by calcining at 350 ℃ for 6 h with the diameter of 15 nm and the length of 150 nm,which exhibited superparamagnetism.With the addition of PEG 600,the length of F was increased to 220 nm and the diameter was decreased to 9 nm,which exhibited higher saturation magnetization.更多还原