New Avenues to Efficient Chemical Synthesis of Exchange Coupled Hard/Soft Nanocomposite Magnet

被引:6
作者
Lee, Don Keun [2 ]
Cha, Hyun Gil [1 ]
Kim, Young Hwan [3 ]
Kim, Chang Woo [1 ]
Ji, Eun Sun [1 ]
Kang, Young Soo [1 ]
机构
[1] Sogang Univ, Dept Chem, Seoul 121742, South Korea
[2] Cheil Ind Inc, Uiwang Si 437711, Gyeonggi Do, South Korea
[3] Pukyong Natl Univ, Dept Chem, Pusan 608737, South Korea
关键词
Nd-Fe-B Alloy Particles; Thermal Decomposition; Exchange Coupled; Nanocomposite; PERMANENT-MAGNETS; NANOPARTICLES; REDUCTION; FE;
D O I
10.1166/jnn.2009.M76
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Nd-Fe-B ultrafine amorphous alloy particles were prepared by reaction of metal ions with borohydride in aqueous solution. Monodispersed Fe nanoparticles were synthesized under an argon atmosphere via thermal decomposition of Fe2+-oleate(2). Exchange coupled Nd2Fe14B/Fe nanocomposite magnets have been prepared by self-assembly using surfactant. The crystal structure of the synthesized nanoparticles was identified by using X-ray powder diffraction (XRD). The size and shape of nanoparticles were obtained by transmission electron microscope (TEM). Thermogravimetry using a microbalance with magnetic field gradient positioned below the sample was used for the measurement of a thermomagnetic analysis (TMA) curve showing the downward magnetic force versus temperature.
引用
收藏
页码:4453 / 4458
页数:6
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