Carbon-Encapsulated Iron Carbide Nanoparticles in the Thermal Conversions of Ferrocene at High Pressures

被引：15
|
作者：
Davydov, V. [2 ]
Rakhmanina, A. [2 ]
Allouchi, H.
Autret, C.
Limelette, P.
Agafonov, V. [1 ]
机构：
[1] Univ Tours, LEMA, UMR 6157, F-37200 Tours, France
[2] Russian Acad Sci, IHPP, Troitsk, Russia
来源：
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES | 2012年 / 20卷 / 4-7期
关键词：
High pressure; nanoparticles; Fe7C3; XRD; microscopy; magnetism;
D O I：
10.1080/1536383X.2012.655649
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：
Pressure-temperature-induced transformations of ferrocene at 8 GPa and different temperatures up to 1000 degrees C have been studied by XRD, SEM and TEM techniques. It was shown that the thermal destruction of ferrocene at 480-600 degrees C is attended with the formation of quasi-spherical nanosized (10-30 nm) particles containing the iron carbide (Fe7C3) core and external carbon envelope from the fragments of graphene layers. Magnetic measurements indicate that the nanoparticles obtained at 8 GPa and 480-560 degrees C demonstrate a superparamagnetic behaviour at room temperature. Above 600 degrees C, the Fe7C3 nanoparticles decompose into Fe3C and graphite.
引用
收藏
页码：451 / 454
页数：4
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