Catalyst-free synthesis of 尾-SiC polyhedra and 伪-SiC nano-platelets by RF thermal plasma

详细信息    查看全文

• 作者：Mingshui Yao ; Huacheng Jin ; Jinlin Li ; Fei Ding ; Chen Lu ; Guolin Hou ; Fangli Yuan
• 关键词：Nanoparticles ; Crystal growth ; SiC ; RF thermal plasma
• 刊名：Materials Letters
• 出版年：1 February, 2014
• 年：2014
• 卷：116
• 期：Complete
• 页码：104-107
• 全文大小：1466 K

文摘

Based on the reuse of by-products in the silicone industry, a simple catalyst-free method has been developed for the synthesis of SiC powders in a thermal plasma system. Detailed structures of the as-prepared products were characterized. Crystals collected showed two types of morphologies, which were spheres and crystals with specific exposed facets. The spherical nanoparticles were attributed to high cooling rate of droplets. The latter ones can formed according to their crystal growth habits. As a result, the equilibrium forms of 尾-SiC were found to be polyhedra with regular or irregular shapes, while for 伪-SiC were mainly nano-platelets with (001) faces on the upper and basal planes and a few polyhedra based on platelets. By improving diffusion of reactants, the contaminations of products can be significantly reduced.