XRD patterns show the samples contain spinel cobalt ferrite phase and bcc CoFe_2 phase. The proportion of CoFe_2O_4 to CoFe_2 phase diminishes with the increasing of reducing time.

• XRD的结果证明:钴铁氧体纳米颗粒经过部分还原后出现了bcc结构的CoFe_2相,并且随着还原时间变长,合金相的所对应的衍射峰强增加,CoFe_2O_4相的变化规律则恰好相反。