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论文类型： 期刊论文

发表时间： 2009-04-03

发表刊物： JOURNAL OF ALLOYS AND COMPOUNDS

收录刊物： SCIE、EI、Scopus

卷号： 473

期号： 1-2

页面范围： 212-214

ISSN号： 0925-8388

关键字： Nanostructured materials; TEM; X-ray diffraction; Detonation synthesis; Magnetic materials

摘要： Cobalt naphthenate and cyclo-1,3,5-trimethylene-2,4,6-trinitramine (RDX) were used to synthesize carbon-coated cobalt with detonation technique. The reaction was initiated by an electric blasting caps in a vacuum explosion vessel. The detonation soot obtained from the inner wall of the vessel was characterized by XRD, TEM, Raman spectroscopy and vibrating sample magnetometer. XRD pattern indicated that well-crystallized fcc-Co, nanoparticles existed in the detonation soot and the average grain size was 30 nm. TEM images showed that the detonation soot consisted of cobalt cores and carbon shells in the form of core-shell structure. Additionally, it also revealed that the nanoparticles were well dispersed after the reaction. Raman spectra gave the information that two carbon phases existed in the products. The magnetic hysteresis curve demonstrated that the prepared nanoparticles exhibited superparamagnetism. The results of the experiment proved that detonation technique offered a simple and energy-saving way for synthesizing carbon-coated cobalt. (C) 2008 Elsevier B.V. All rights reserved.