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个人信息Personal Information
教授
博士生导师
硕士生导师
任职 : 大连理工大学成都研究院院长
性别：男
毕业院校：中科院大连化学物理研究所
学位：博士
所在单位：化工学院
学科：化学工艺. 物理化学. 功能材料化学与化工
办公地点：大连理工大学西部校区化工综合楼A401室
联系方式：辽宁省大连市高新区凌工路2号，邮编116024
电子邮箱：changhai@dlut.edu.cn
Rapid preparation and magnetic properties of Fe3Si-Al2O3 nanocomposite by mechanical alloying and heat treatment
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论文类型：期刊论文
发表时间：2016-06-01
发表刊物：PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
收录刊物：SCIE、EI
卷号：213
期号：6
页面范围：1585-1591
ISSN号：1862-6300
关键字：iron silicide; magnetic property; mechanical alloying; Mossbauer spectroscopy
摘要：Fe3Si-Al2O3 nanocomposite has been prepared by mechanical alloying of Fe3O4, Al and Si powder mixture and heat treatment. Powder XRD patterns, TEM and HRTEM images and XPS spectra revealed the crystalline transformations from raw materials to Fe3Si-Al2O3 nanocomposite during mechanical alloying and annealing and from Fe to Fe3Si to a mixture of Fe3Si, Fe5Si3 and FeSi with the proportion of Si in raw materials increasing. The average particle size of smaller Fe3Si nanoparticles was about 20 nm and the aggregation under high temperature leaded to larger Fe3Si nanoparticles with average particle size of about 60 nm. Fe-57 Mossbauer spectra illustrated the existence of amorphous phases and effectively supplemented other characterisation results. The samples exhibited ferromagnetic behaviour with hysteresis loops and their saturation magnetisations decreased with the proportion of Si in samples increasing. (C) 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim