乙醇在相转化中的抑制作用  

Alcohol as Inhibitor in Phase-transformation

作　　者：张玉亭[1] 戴仲善 于洺[1] 张国春 

机构地区：[1]天津纺织工学院纺化系,天津300160

出　　处：《物理化学学报》1994年第6期532-535,共4页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金

摘　　要：实验表明在发生相转化的FeCl3－HCl水解体系中，醇的存在起到了相转化抑制剂的作用，降低了α－Fe2O3沉淀组分的过饱和浓度，减少了成核数目，有利于形成较大的均匀胶体粒子．粒子尺寸随浓度的增加而加大，形状因球形趋变为立方体．Alcohol, presented in the hydrolysis of ferric chloride at elevated temperature,inhibits the phase transformation from β-FeOOH to a-Fe2O3, reduces the supersaturation of the precipitated species α-F2O3, decreases the number of nucleation and therefore favours the formation of much larger uniform α-F2O3 particles. With increasing amount of alcohol, the sizes of particles increase, while the shapes of them change gradually from sphere to cube.

关 键 词：相转化 抑制剂 成核过程 乙醇 

分 类 号：O623.411[理学—有机化学]