Synthesis of carbon-encapsulated magnetic nanoparticles by a grain-boundary-reaction

被引：0
|
作者：
Wang, QX [1 ]
Ning, GQ [1 ]
Wei, F [1 ]
Luo, GH [1 ]
机构：
[1] Tsinghua Univ, Dept Chem Engn, Beijing 100084, Peoples R China
来源：
UNCONVENTIONAL APPROACHES TO NANOSTRUCTURES WITH APPLICATIONS IN ELECTRONICS, PHOTONICS, INFORMATION STORAGE AND SENSING | 2003年 / 776卷
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D O I：
暂无
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Carbon-encapsulated ferric magnetic nanoparticles were prepared by the grain-boundary-reaction of ultrafine goethite particles. The mechanism of the grain-boundary-reaction was studied with high-resolution transmission electronic microscope, X-ray diffraction and then-no gravimetric analysis. The magnetic properties are measured with a vibrating sample magnetometer. The diameter of carbon-encapsulated ferric magnetic nanoparticles; is 30similar to60 nm, and the coercive force and saturate magnetization are 315 Oe land 30 emu/(g powder), respectively. These composite particles are very stable in air.
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页码：55 / 60
页数：6
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