NDLI: The effect of methane decomposition on the formation and magnetic properties of iron carbide prepared from oolitic hematite

Content Provider	Royal Society of Chemistry (RSC)
Author	Li, Guangqiang Wang, Henghui Zhao, Dong Ma, Jianghua
Copyright Year	2017
Abstract	A chemical metallurgical method was used to prepare iron carbide from high phosphorus oolitic hematite in an atmosphere of H2/CH4. The relationship between the rate of methane decomposition and the iron carbide formation was discussed by using the Mossbauer spectrum to accurately determine the content change of iron carbide with time in the carburized product. Moreover, the carburized samples were characterized by transmission electron microscopy (TEM), Raman spectroscopy and X-ray diffraction (XRD), and the magnetic properties were examined by a vibrating sample magnetometer (VSM). The results show that 1023 K is the optimum temperature for iron carbide preparation from high phosphorus oolitic hematite. After deep reduction in the initial period of contact with CH4, the conversion of deposited carbon to the iron carbide rises rapidly, and then declines quickly. A polycrystalline electron diffraction analysis reveals that iron carbide, graphite and quartz are in the carburized sample. The iron carbide prepared from high phosphorus oolitic hematite in an H2/CH4 atmosphere is a soft magnetic material with relatively high magnetic properties.
Starting Page	3921
Ending Page	3927
Page Count	7
File Format	HTM / HTML PDF
ISSN	20462069
Volume Number	7
Issue Number	7
Journal	RSC Advances
DOI	10.1039/c6ra26166c
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Hematite Methane Vibrating-sample magnetometer Electron diffraction Crystallite Phosphorus Raman spectroscopy Quartz Carbon Oolite Transmission electron microscopy Graphite X-ray scattering techniques Raman
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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