摘要：用室温固相反应合成纳米Co₃O₄前驱体,用热重分析(TG)、X射线衍射分析(XRD)等手段对前驱体的分解过程进行了研究。结果表明,前驱体为CoC₂O₄·2H₂O,呈单斜结构。随温度的升高,前驱体分解过程分两步进行:首先前驱体脱水分解为CoC₂O₄,然后再分解为Co3O4纳米粉。煅烧温度较低时,随煅烧时间的延长,CoC₂O₄逐渐分解为Co₃O₄,并且颗粒尺寸约为17nm。煅烧温度较高时,随着时间的延长Co₃O₄颗粒迅速长大,结晶更完全。

关键词：固相反应;Co₃O₄纳米粉;分解;前驱体;

Abstract: The precursor of Co₃O₄ nanoparticles is synthesized througlsolid state reaction at ambient temperature. The decomposition process isstudied by thermal gravity analysis (TC) and X-ray diffraction (XRD). Theresults indicate that the precursor is monoclinic CoC₂O₄·2H₂O with an ir-regular morphology.The decomposition process is composed of two steps:firstly the precursor loses its structure water and becomes CoC₂O₄; second-ly the CoC₂O₄ decomposes into Co₃O₄ nanoparticles. At low temperature,as the calcining time increasing the precursor can also decompose into Co₃O₄ nanoparticles with .an average particle size 17 nm. At high calcin-ing temperature the particle size increases fast as the calcining going on.

Keywords: solid state reactiono;Co₃O₄ nanoparticle;decomposition pro-cess;precursor