摘要
The thermal decomposition kinetics of Ag2O-graphite mixture was systematically studied using a differential scanning calorimeter（DSC） in terms of model-fitting Malek approach, integral master plot method and model-free advanced isoconversional method of Vyazovkin. The results showed that the thermal decomposition occurred in two stages. The first step was the decomposition process of Ag2 O to form porous silver particles as a complex process with the participation of at least two mechanisms, and the second step corresponded to the structural change from porous particles to silver bulk crystals as a single-step process.
根据模型拟合Malek法、积分主曲线法和无模型的先进等转化率法,采用差示扫描量热仪系统研究了Ag2O-石墨混合物热分解的动力学。结果表明,热分解包含两个阶段,在第一阶段,Ag2O分解形成多孔银颗粒,该过程复杂,至少存在两种机制;在第二阶段,多孔粒子发生结构变化而形成大块银晶体,此过程为单步过程。
