Preparation and Mechanism of α-Fe2O3 Nanoparticles by Using Iron Concentrate Powder

被引：0

作者：

Li T. ^{[1
,2
]}

Pei W.-L. ^{[1
,2
]}

Chen W.-Q. ^{[3
]}

Tong B. ^{[3
]}

机构：

[1] School of Material Science & Engineering, Northeastern University, Shenyang

[2] Key Laboratory for Anisotropy, Texture of Materials Ministry of Education, Northeastern University, Shenyang

[3] Fushun Hanking Aoniu Mining Co., Ltd., Fushun

来源：

Dongbei Daxue Xuebao/Journal of Northeastern University | 2023年 / 44卷 / 02期

关键词：

dispersion; grain size; iron concentrate powder; nanoparticles; α-Fe[!sub]2[!/sub]O[!sub]3[!/sub;

D O I：

10.12068/j.issn.1005-3026.2023.02.008

中图分类号：

学科分类号：

摘要：

Using commercial magnetite iron powder (Fe3O4 ), a purification and preparation process was designed, and α-Fe2O3 nanoparticles with a mass fraction of more than 99. 5% and good dispersibility were successfully prepared. The purification, preparation process and mechanism were studied in detail. The results show that: wNaOH has a significant impact on the effect of silicon removal, when wNaOH is 39 %, the wSiO2 in the raw ore powder can be reduced from 1. 11 % to 0. 032 % to get more pure iron fine powder. With the increase of the sintering temperature, the crystallization, appearance characteristics and magnetic properties of α-Fe2O3 particles have changed. When the sintering temperature is 670 ℃, the comprehensive performance of α-Fe2O3 particles is the best, including higher particle crystallinity, good dispersibility and ferrimagnetic properties. By controlling the heating and stirring time of the hydroxide sediment, the grain size of the α-Fe2O3 can be effectively regulated. When the stirring time is 60 min, the α-Fe2O3 with a high-quality dispersability and a average particle size of only 35. 3 nm is obtained. © 2023 Northeastern University. All rights reserved.

引用

页码：206 / 214

页数：8

共 28 条

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