铁精粉制备α-Fe2O3纳米粒子及其机理

doi:10.12068/j.issn.1005-3026.2023.02.008

东北大学学报（自然科学版） ›› 2023, Vol. 44 ›› Issue (2): 206-214.DOI: 10.12068/j.issn.1005-3026.2023.02.008

铁精粉制备α-Fe₂O₃纳米粒子及其机理

李婷^1,2，裴文利^1,2，陈婉晴³，佟冰³

(1. 东北大学材料科学与工程学院，辽宁沈阳110819； 2. 东北大学材料各向异性与织构教育部重点实验室，辽宁沈阳110819; 3. 抚顺罕王傲牛矿业股份有限公司，辽宁抚顺113125)

修回日期:2021-12-07 接受日期:2021-12-07 发布日期:2023-02-27
通讯作者: 李婷
作者简介:李婷(1996-)，女，福建南平人，东北大学硕士研究生; 裴文利(1970-)，男，辽宁沈阳人，东北大学教授，博士生导师.
基金资助:
国家自然科学基金资助项目(52071070， 51871045); 中央高校基本科研业务费专项资金资助项目(N2017003， N2102004).

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

LI Ting^1,2， PEI Wen-li^1,2， CHEN Wan-qing³， TONG Bing³

1. School of Material Science & Engineering， Northeastern University， Shenyang 110819， China; 2. Key Laboratory for Anisotropy and Texture of Materials Ministry of Education， Northeastern University， Shenyang 110819， China; 3. Fushun Hanking Aoniu Mining Co.， Ltd.， Fushun 113125， China.

Revised:2021-12-07 Accepted:2021-12-07 Published:2023-02-27
Contact: PEI Wen-li
About author:-
Supported by:
-

摘要/Abstract

摘要： 采用商业磁铁矿铁精粉(Fe₃O₄)，设计了提纯和制备工艺，成功制备出质量分数为99.5%以上、分散性良好的α-Fe₂O₃纳米粒子，对其提纯、制备工艺及机理进行了深入研究. 结果表明:w_○NaOH对除硅效果影响显著，当w_○NaOH为39 %时，可使原料矿粉中w_○SiO▲2由1.11 %降至0.032%，得到较纯铁精粉;随烧结温度的升高， α-Fe₂O₃颗粒的结晶度、形貌特征及磁性能随之发生变化;当烧结温度为670℃时， α-Fe₂O₃颗粒综合性能最佳，颗粒结晶度较高、分散性较好，具有亚铁磁性;通过对氢氧化铁沉淀物加热搅拌时间的控制，可有效调控α-Fe₂O₃的晶粒尺寸；当搅拌时间为60min时，获得分散性好、平均粒径仅为35.3nm的α-Fe₂O₃纳米粒子.

关键词: α-Fe₂O₃；铁精粉；纳米颗粒；晶粒尺寸；分散性

Abstract: 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: w_NaOH has a significant impact on the effect of silicon removal， when w_NaOH is 39 %， the w_SiO▲2 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 60min， the α-Fe₂O₃ with a high-quality dispersability and a average particle size of only 35.3nm is obtained.

Key words: α-Fe₂O₃; iron concentrate powder; nanoparticles; grain size; dispersion

中图分类号:

TM273

李婷，裴文利，陈婉晴，佟冰. 铁精粉制备α-Fe₂O₃纳米粒子及其机理[J]. 东北大学学报（自然科学版）, 2023, 44(2): 206-214.

LI Ting， PEI Wen-li， CHEN Wan-qing， TONG Bing. Preparation and Mechanism of α-Fe₂O₃ Nanoparticles by Using Iron Concentrate Powder[J]. Journal of Northeastern University(Natural Science), 2023, 44(2): 206-214.

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铁精粉制备α-Fe₂O₃纳米粒子及其机理

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

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