Characterization, Photoluminescence and Magnetic Properties of SiC Nanowires Synthesized with Nickel Catalyst via Microwave Heating
Large scale SiC nanowires were synthesized through a rapid and low-cost microwave heating method.Silicon, silica, graphite and nickel powders were used as raw materials and catalyst, respectively, and no inert protective gas was employed during the preparation.The microstructures of the products were comprehensively characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectrum (EDS), and transmission electron microscopy (TEM).Results showed that the nanowires have lengths of several dozens of micrometers and diameters of 50nm approximately.The growth of them was governed by vapor-liquid-solid (VLS) growth mechanism.In addition, the photoluminescence (PL) and magnetic properties of the products were subsequently investigated by fluorescent photometer and vibrating sample magnetometer (VSM).The PL spectrum, employing a Xe laser (240 nm) as an excitation source,shows an emission band centered at about 390 nm, indicating that the obtained SiC nanowires possess excellent optical property.The hysteresis loop shows big magnetic saturation (Ms) of 0.96 emu/g and small coercivity (Hc) of 37.92 Oe.So, the obtained SiC nanowires can be characterized as typical soft magnetic material, and the improvement of magnetic properties may be attributed to the existence of Ni2Si phase in the SiC nanowires.
SiC nanowires Catalyst Microwave heating Magnetic property Photoluminescence
Song Liu Shan Huang Ji-gang Wang
Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China; Southeast University-Zhangjiagang Industry Technology Research Institute, Zhangjiagang 215628, China
国际会议
The Eighth China National Conference on Functional Materials and Applications(第八届中国功能材料及其应用学术会议)
哈尔滨
英文
188-194
2013-08-23（万方平台首次上网日期，不代表论文的发表时间）