Preparation of Co1-xNixFe2O4 nanoparticles by coprecipitation method

被引:13
|
作者
Ryu, BH [1 ]
Chang, HJ [1 ]
Choi, YM [1 ]
Kong, KJ [1 ]
Lee, JO [1 ]
Kim, CG [1 ]
Jung, HK [1 ]
Byun, JH [1 ]
机构
[1] Korea Res Inst Chem Technol, Adv Mat Div, Taejon 305600, South Korea
来源
关键词
D O I
10.1002/pssa.200304669
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Co1-xNixFe2O4 nanoparticles were prepared by a coprecipitation method. The effects of precipitants and Co/Ni ratio on particle shape and magnetic properties of Co1-xNixFe2O4 nanoparticles were investigated. The physical properties such as particle size, phase, and magnetic properties of Co1-xNixFe2O4 nanoparticles depended largely on the Co/Ni ratio and precipitant as well as heat-treatment. In case of using NaOH as a precipitant, the synthesized nanoparticles were magnetite phase including a small part of impurity which is needle shaped and non-magnetic material. On the other hand, the nanoparticles synthesized by NH4OH precipitant were amorphous phase. The coercive force of the nanoparticles was increased drastically with increasing heat-treatment temperature in the range of 400-600 degreesC. The high coercive force of magnetic nanoparticles with the size of 20-30 nm was obtained up to 1450-1800 Oe.
引用
收藏
页码:1855 / 1858
页数:4
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