Growth and Morphology of β-Si₃N₄ Nano-Belts by Carbothermal Reduction Nitridation of Used Silica Refractory Brick

Abstract:

Silicon nitride (β-Si₃N₄) nano-belts had been synthesized by used silica bricks and carbon powder as raw materials through carbothermal reduction nitridation. The morphology and microstructure of β-Si₃N₄ nano-belts were characterized by scanning electron microscopy (SEM/HRSEM), energy disperse spectrum (EDS) and X-ray diffraction (XRD). Results showed that the well-crystallized β-Si₃N₄ nano-beltes were grown with thinness of 50-150nm and width of 3-5μm. The relatively purer β-Si₃N₄ were prone to be thin films with thinness of 150nm, while the as-grown SiCN (impurityβ-Si₃N₄with C elements) were presented as nanorods with cross section length of 150*150nm. Orientation growth mechanism by grain dislocation and vapor-solid (VS) mechanism were both involved in the growth of nanostructures of β-Si₃N₄ nano-beltes and SiCN nanorods.

• Periodical: Advanced Materials Research (Volume 624)
• Pages: 1-4
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.624.1
• Online since: December 2012
• Authors: Wen Juan Li, Zi He Pan, Zhao Hui Huang, Yan Gai Liu, Ming Hao Fang
• Keywords: Carbothermal Reduction Nitridation, Growth Mechanism, SiCN Nanorod, Silicon Nitride (β-Si₃N₄) Nano-Belt, Used Silica Refractory Brick

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