摘要
本文提出一个分形几何模型(Fractal geometry model)。用它描述固体粉末体系的结构特征,并在此基础上建立了单金属粉末体系烧结过程的动力学模型。以单分子反应为例,研究了与烧结有关的若干因素。将理论预测与已有实验进行比较,得到了较满意的结果。
A fractal geometry model (FGM)is propounded to describe structural characters of powder compact. On this basis, a geometric and then a dynamic model are set up for sintering of single metal systems. Several factors relative to the sintering process are studied with single molecule reactions as an example; theoretical prediction and experimental results are compared for Raney Cu catalyst's sintering in H_2 atmosphere, with satisfactory results.
关键词
分形几何
烧结
粉末
固体
催化剂
fractal geometry, partcle size and surface area distribution, sintering, surface potential barrier, transition state theory
