机构地区: 华南理工大学轻工与食品学院轻化工研究所
出 处: 《华南理工大学学报(自然科学版)》 1998年第2期13-16,共4页
摘 要: FeOOH是制备磁记录材料的中间体,在一定条件下可相转化为α_Fe2O3。本文研究了FeSO4、SnCl2、NiSO4等添加离子对δ_FeOOH在水热处理时相转化的影响,结果表明Fe(Ⅱ)和Sn(Ⅱ)离子对相转化反应具有催化作用。最后探讨了其影响机理,认为相转化是按溶解-结晶机理进行,在FeSO4、SnCl2存在下δ_FeOOH颗粒表面会发生局部的氧化-还原反应,从而促进其相转化。 FeOOH,which is an intermediate for preparing magnetic recording materials,can be changed into α_Fe 2O 3 by means of phase transformation.In this paper,phase tranformation of δ_FeOOH particles in the presence of FeSO 4 or SnCl 2,was studied by aging a reaction mixture of δ_FeOOH and added ions.The results show that the phase transformation of δ_FeOOH can be accelerated by Fe(Ⅱ) and Sn(Ⅱ) ions.It is pointed out that the phase transformation is processed according to the dissolution_crystallization mechani...
关 键 词: 相转化