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Synthesis of Si3N4 whiskers by rapid nitridation of silicon droplets |
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| Authors: | Jinguang Yang Ping Wu Yanping Zhang Dan Yan Shiping Zhang Ya-nan Li Li Wang |
| Affiliation: | 1. Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing, China;2. Central Research Institute of Building and Construction Co. Ltd, China, Metallurgical Group Corporation, Beijing, China;3. School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, China Beijing Engineering Research Centre of Energy Saving and Environmental Protection, Beijing, China |
| Abstract: | Belt-like β-Si3N whiskers were successfully synthesized by nitriding of liquid silicon without catalysts at 1500°C by using micron-sized silicon powders within 10 minutes. Silicon droplets formed by the melting of silicon particles greatly facilitates the diffusion of nitrogen. Several whiskers cling together to form a whisker-cluster. The whisker-clustermorphology results from nitriding of separate silicon droplets. The growth of the belt-like β-Si3N4 whisker was controlled by vapor-liquid-solid mechanism. The synthesis of silicon nitride whiskers can be effectively improved by nitriding liquid phase silicon. |
| Keywords: | morphology nitridation silicon nitride |