高等学校化学研究 ›› 2010, Vol. 26 ›› Issue (3): 348-351.
Synthesis and Characteristics of Fe3C Nanoparticles Embedded in Amorphous Carbon Matrix
YANG Kai-yu1, XU Wei2, ZHANG Yu3, ZHENG Wei-tao3 and WANG Xin3*
- 1. Center of Test Science;
2. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry;
3. Key Laboratory of Automobile Materials, Ministry of Education, College of Materials Science and Engineering, Jilin University, Changchun 130012, P. R. China
Synthesis and Characteristics of Fe3C Nanoparticles Embedded in Amorphous Carbon Matrix
YANG Kai-yu1, XU Wei2, ZHANG Yu3, ZHENG Wei-tao3 and WANG Xin3*
- 1. Center of Test Science;
2. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry;
3. Key Laboratory of Automobile Materials, Ministry of Education, College of Materials Science and Engineering, Jilin University, Changchun 130012, P. R. China
摘要：
We proposed a new way to synthesize a nanocomposite consisted of cementite Fe3C nanoparticles and amorphous carbon by radio frequency plasma-enhanced chemical vapor deposition. Transmission electron microscope images show the existence of nanometric dark grains(Fe3C) embedded in a light matrix(amorphous carbon) in the samples. X-ray photoelectron spectroscopy experiment exhibit that the chemical bonding state in the films corresponded to sp3/sp2 amorphous carbon, sp3 C―N(287.3 eV) and C1s in Fe3C(283.5 eV). With increasing deposition time, the ratio of amorphous carbon increased. The magnetic measurements show that the value of in-plane coercivity increased with increasing carbon matrix concentration(from about 6.56×103 A/m for film without carbon structures to approximately 2.77×104 and 5.81×104 A/m for nanocomposite films at room temperature and 10 K, respectively). The values of saturation magnetization for the synthesized nanocomposites were lower than that of the bulk Fe3C(140 Am2/kg).