PREPARATION OF MONODISPERSED HEMATITE PARTICLES BY 2-STEP HYDROLYSIS OF FERRIC-CHLORIDE AQUEOUS-SOLUTIONS

被引：15

作者：

NAKAMURA, T

KUROKAWA, H

机构：

[1] R and D Division, Toda Kogyo Corporation, Hiroshima, 730, Funairi-minami, Naka-ku

来源：

JOURNAL OF MATERIALS SCIENCE | 1995年 / 30卷 / 18期

关键词：

D O I：

10.1007/BF01153082

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Monodispersed haematite particles have been synthesized by two-step hydrolysis of dilute FeCl3 aqueous solution. The first step is the hydrolysis of FeCl3 solution at 70 similar to 90 degrees C, which provided beta-FeO(OH) colloidal suspension, and the second step is the transformation from beta-FeO(OH) to alpha-Fe2O3 at 100 similar to 120 degrees C via a dissolution and recrystallization process. Partial neutralization with NaOH solution promotes the hydrolysis of highly concentrated FeCl3 solutions. Particle size of alpha-Fe2O3 can be controlled by neutralization degree, and it decreases with decreasing the electrolyte concentration.

引用

页码：4710 / 4714

页数：5

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