摘要
在Coats-Redfern积分式和Ozawa公式的基础上,采用双外推法对FeC_2O_4·2H_2O脱水过程的最可能机理进行了研究.结果表明其脱水过程分两步进行:第一步脱水过程为成核与生长过程,G(α)函数积分式为[-ln(1-α)]1/1.5;第二步脱水过程为二维扩散过程,G(α)式为(1-α)ln(1-α)+α;同时求得相应的动力学参数.
On the basis of the Coats-Redfern's integral equation and Ozawa's equation. the probable mechanism of the dehydration process of FeC2O4 2H2O was investigated using double extrapolation. The dehydration Process includes two steps. The first step is the nuclear producing and growing process(n=1.5), G(a)= [in(1-a)]1/1.5; the second step is a two-dimensional diffusion process, G(a)=(1-a)ln(1-a)+a: the corresponding kinetic parameters were determined.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
1998年第12期1088-1093,共6页
Acta Physico-Chimica Sinica
基金
天津市教委重点学科资助
关键词
双外推法
草酸亚铁
二水合物
脱水
动力学
机理
Double extrapolation TG-DTA technique, Dehydration process of FeC_2O_4·2H_2O Mechanism function