摘要
氯化铁酸性溶液升温强迫水解，生成细小的短纺棰形β－ＦｅＯＯＨ粒子，成长为棒状β－ＦｅＯＯＨ大粒子和发生相转化而生成球状或立方体α－Ｆｅ２Ｏ３粒子，相转化方式有三种：聚集再结晶式，交点膨胀式和独立成核武，其决定因素是原始陈化液中三价铁离子和氯离子的浓度。
The hydrolyds of ferric chloride acidic solution at elevated temperyture is consisted of the formation of tiny spindle-shaped β-FeOOH particles, followed by the growing into large rodlike β-FeOOH particles and then phase-transforming into spheric or cubic α-Fe2O3. There are three type of phsae-transformations: Coagulation-recristallization, intersection-point expansion and indeependent nucleation. The determine factor is the concentrstion of ferric and chloride ions.
基金
国家自然科学基金
关键词
水解
相转化
氯化铁
溶液
胶体粒子
hydrolysis
precipitating species
super-saturation
phase-transformation
