摘要
在过程分析的基础上，以Ｎａ２ＣＯ３作为沉淀剂，在ＦｅＳＯ４溶液中形成Ｆｅ（ＯＨ）２－ＦｅＣＯ３沉淀，通入空气氧化制备了均匀纺锤形α－ＦｅＯＯＨ微晶。研究了碱比、通气量、温度、浓度、搅拌转速以及加料方式等对制备过程以及纺缍形铁黄形态的影响规律，并制备出粒度为０．２μｍ，轴比为３～４，均匀、无枝杈的纺锤形α－ＦｅＯＯＨ粒子。实验验证了该过程为传质控制。
On the basis of process analysis, spindle α FeOOH microcrystals were prepared by oxidizing ferrous carbonate suspensions formed in the solution of ferrous sulphate using carbonate as precipitant. The effects of alkaline ratio、reaction temperature、initial concentration、air flow rate and impeller speed on the preparation process and the morphology of α FeOOH microcrystals were investigated in details. The synthesized spindle α FeOOH microcrystals had average length of 0.20μm,acicularity ratio of 3～4 and save perfect crystal habit. Oxygen tranfer was found to be the controlling step of the process.
出处
《华东理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1997年第3期298-302,共5页
Journal of East China University of Science and Technology
基金
国家自然科学基金
关键词
铁黄
磁粉
磁记录材料
超微粒
纺缍形
微晶
geothite
magnetic powder
magnetic recording materials
ultrafine powder
preparation
