摘要
本文对硝酸铁的酸性溶液当存在少量草酸时升温水解而生成均匀橄榄状α—Fe_2O_3胶体粒子的动力学进行了分析。按照 Nielsen 时矩(Chronomal)理论,晶体的成长过程符合二级多核层表面反应控制机理,并由此求出速度常数。计算的表面控制过程的活化能值表明,草酸参与了三价铁离子的络合过程。
The growth mechanism of uniform olivery hematite colloidal particles formed by the hydrolysis of the ferricnitrate in the presence of oxalic acid at elevated temperature was discussed.Growth of the crystal is though to occur via surface reaction control with ki- netic order 2 and its rate constants were calculated by using Nielsen Chronomal theory. Activation energy of surface controlled growth indicated that oxalic acid complexes ferric ions.
出处
《天津工业大学学报》
CAS
北大核心
1991年第1期14-20,共7页
Journal of Tiangong University
基金
自然科学基金资助
项目编号化学2860108
关键词
草酸
成长机理
三氧化二铁
表面反应
oxalic acid
growth machanism
hematite
surface reaction
