铁酸钙氢还原制备球形纳米铁粉的工艺及机理

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Abstract Three kinds of percursors powders including single phase CaFe₂O₄, single phase CaFe₂O₄ and mixed phase Ca₂Fe₂O₅/CaO were prepared by calcine using CaO and Fe₂O₃ as raw materials. Nanometer Fe powders were prepared by reducing percursors powders under hydrogen. The effects of the type of percursors on the reducing temperature, the morphology and particle size of Fe powders were studied. The formation mechanism of spherical nanometer Fe powders prepared by reducing calcium ferrite was discussed. The results show that the reducing temperature increases, the particle size of Fe powders decreases and the morphology of Fe powders change from irregular to sphere, with increasing the ratio of CaO. The spherical Fe powders with the average particle size of 34 nm are obtained by reducing Ca₂Fe₂O₅/CaO percursor at 950 ℃ under hydrogen, the particle size distribution is uniform and the didpersity is good. The CaO plays a role in dispersing and promoting the nucleation of Fe powder in the preparation of nano Fe powder.

Key words： calcium ferrite hydrogen reduction spherical nanometer Fe powder particle size

Received: 29 July 2018 Published: 19 July 2019

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	Articles by authors
	ZHANG Yuqi
	GAO Zili
	CHEN Xingui
	WU Aihua
	YE Nan
	WU Jiajing
	TANG Jiancheng

Cite this article:

ZHANG Yuqi,GAO Zili,CHEN Xingui, et al. Prepared process and mechanism of spherical iron nano-powder by the hydrogen reduction of calcium ferrites[J]. Materials Science and Engineering of Powder Metallurgy, 2018, 23(6): 640-646.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2018/V23/I6/640

[1] HUBER D L.Synthesis, properties, and applications of iron nanoparticles[J]. Small. 2005, 1(5): 482-501.
[2] OHTSUKA Y.Selective conversion of fuel-bound nitrogen to N₂ with iron nanoparticles[J]. Journal of the Japan Petroleum Institute, 1998, 3(41): 182-192.
[3] GHAUCH A, TUQAN A, ASSI H A.Antibiotic removal from water: elimination of amoxicillin and ampicillin by microscale and nanoscale iron particles[J]. Environmental Pollution, 2009, 157(5): 1626-1635.
[4] TIAN H, LI J, MU Z, et al.Effect of pH on DDT degradation in aqueous solution using bimetallic Ni/Fe nanoparticles[J]. Separation and Purification Technology, 2009, 66(1): 84-89.
[5] 吴旻, 张秋禹, 罗正平, 等. 软质磁性材料的制备及在磁流变液中的应用[J]. 物理化学学报, 2001, 14(5): 597-600.
WU Min, ZHANG Qiuyu, LUO Zhengpin, et al.The preparation of light magnetic materials and it’s application on magnetorheological fluids[J]. Chinese Journal of Chemical Physics, 2001, 14(5): 597-600.
[6] MIURA K, MASUDA M, ITOH M, et al.micro-wave absorption properties of the nano-composite powders recovered from Nd-Fe-B bonded magnet scraps[J]. Journal of Alloys and Compound, 2006, 408: 1391-1395.
[7] 彭伟才, 陈康华, 李晶儡, 等. 随机分布Fe纳米线复合材料的吸波性能[J]. 中国有色金属学报, 2005(2): 288-294.
PENG Weicai, CHEN Kanghua, LI Jinglei, et al.Microwave absorbing properties of iron nanowire composites distributed randomly[J]. The Chinese Journal of Nonferrous Metals, 2005(2): 288-294.
[8] PANKHURST Q A, CONNOLLY S K, JONES J, et al.Applications of magnetic nanoparticles in biomedicine[J]. Journal of Physics D: Applied Physics, 2003, 36(13): 167-181.
[9] ROSENSWEIG R E.Heating magnetic fluid with alternating magnetic field[J]. Journal of Magnetism and Magnetic Materials, 2002, 252: 370-374.
[10] 曹茂盛. 气相还原法制备α-Fe超细粉末[J]. 材料科学与工艺, 1995, 3(3) : 67-69.
CAO Maosheng.The α-Fe ultra-fine-powder preparation by vapor phase deoxidation[J]. Material Science and Technology, 1995, 3(3): 67-69.
[11] 欧阳鸿武, 孟小杰, 黄誓成, 等. 纳米铁及氧化铁制备技术的进展[J]. 粉末冶金材料科学与工程, 2008, 13(6): 315-322.
OUYANG Hongwu, MENG Xiaojie, HUANG Shicheng, et al.Technological progresses of fabricating nano-iron and nano-iron oxide powders[J]. Materials Science and Engineering of Powder Metallurgy, 2008, 13(6): 315-322.
[12] 程起林, 赵斌, 古宏晨. 液相还原法制备Fe-Cr纳米粉[J]. 东华理工大学学报, 1999, 25(5): 499-502.
CHENG Qilin, ZHAO Bin, GU Hong-chen.Preparation of Fe-Cr nanopowders by chemical reduction in a liquid phase[J]. Journal of East China University of Science and Technology, 1999, 25(5): 499-502.
[13] 彭梅. 超细铁粉的制备及应用[J]. 重型机械科技, 2003(3): 50-53.
PENG Mei.The preparation and the application of the super fine iron powder[J]. Heavy Machinery Science and Technology, 2003, 3: 50-53.
[14] SUSLICK K S. FANG M, HYEON T.Sonochemical synthesis of iron colloids[J]. Journal of the American Chemistry Society, 1996, 118(47): 11960-11961.
[15] VARANDA L C, JAFELICCI J M, TARTAJ P, et al.Structural and magnetic transformation of monodispersed iron oxide particles in a reducing atmosphere[J]. Journal of Applied Physics, 2002, 92(4): 2079-2085.
[16] 郭兴敏. 烧结过程铁酸钙生成及其矿物学[M]. 北京: 冶金工业出版社, 1999, 56-77.
GUO Xingmin.Formation of Calcium Ferrite During Sintering Process and Its Mineralogy[M]. Beijing: Metallurgy Industry Press, 1999: 56-77.
[17] SALEH H I.Synthesis and formation mechanisms of calcium ferrite compounds[J]. Journal of Material Science and Technology, 2004, 20(5): 530-534.
[18] AZZONI C B, MOZZATI M C, MASSAROTTI V, et al New insights into the magnetic properties of the Ca₂Fe₂O₅ ferrite[J]. Solid State Science, 2007, 9: 515-520.