Tungsten carbide (WC) nanopowders synthesized via novel core–shell structured precursors |
| |
| Authors: | Hua Lin Bowan Tao Jie Xiong Qing Li Yanrong Li |
| |
| Affiliation: | 1. State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, PR China;2. School of Materials Science and Engineering, Southwest University, Chongqing 400715, PR China |
| |
| Abstract: | WC powders with a size in the range of 20–60 nm were prepared through carbothermal reduction of a novel core–shell structured precursor in vacuum. The samples were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), high-resolution transmission electron microscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS). The thermolysis process of the precursor has been investigated by themogravimetric analysis and differential thermal analysis (TG–DSC). The results revealed that the single phase WC nanopowders were synthesized at 980 °C for 1 h. Spectra of XPS indicate that the surface of the specimen mainly consists of W, C and O three species elements only. The effects of experimental parameters and reaction mechanism have been explored. Mainly due to the homogeneous chemical composition of the precursor, the synthesizing temperature was greatly lower than the conventional method. |
| |
| Keywords: | Nanopowders WC Hydrothermal method X-ray diffraction |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
