摘要: 采用室温固相反应合成纳米 Co₃O₄前驱体，用X- 射线衍射分析(XRD)和透射电镜(TEM)等手段对前驱体的制备工艺进行了研究，就不同工艺对前驱体形貌、尺寸和产率的影响规律进行了探讨。结果表明,采用 CoS0₄·7H₂O 和 H₂C₂0₄·2HO 为原料制备的前驱体均为单斜相的 CoC₂0₄·2H₂O。在压应力作用下，前驱体的形貌主要为不规则多边形,颗粒尺寸在 50 ~ 500nm 范围内变化。而无压应力作用时，前驱体形貌为不规则形状，颗粒尺寸均匀，约为 150~200 nm。前驱体的产率与工艺参数有较大关系,对反应物分别研磨或反应物混合研磨、施加压力、升高温度和提高 H₂C₂0₄·2HO 的量将有利于提高前驱体的产率。

关键词: 固相反应;工艺参数;纳米 Co₃O₄; 前驱体

Abstract: The precursor of Co₃O₄ nano-particles is synthesized through solidstate reaction at ambient temperature. The effect of the processing technologyon the morphology, particle size and yield is studied by X - ray diffraction(TEM), etc. The CoSO₄ .(XRD) and transmission electron microscope2H0 and H₂C₂0₄·2HO are the starting materials and all the precursorsprepared through different technology are monoclinic CoC₂0₄·2H₂O. Themorphology and particle size of precursors is relative to the technology. Whenthe precursor is prepared through high pressure, it presents an irregularpolygon. The particle size arranges from 50 nm to 250 nm. When the precursoris prepared without pressure, the precursor is irregular with an particle sizearranged from 100 nm to 200 nm. The result also indicates that the yield of theprecursor is also relative to the technology. All the following factors arefavourable for improving the yield: grinding the reagents respectively or themixture of the reagents, improving the reaction temperature, pressing thereagents andincreasing the molarratio of H₂C₂0₄·2HO and CoS0₄·7H₂O

Keywords: solid state reaction; process parameter; Co₃O₄ nano-particle ;