Growth and Morphology of β-Si3N4 Nano-belts by Carbothermal Reduction Nitridation of Used Silica Refractory Brick
Silicon nitride (β-Si3N4) nano-belts had been synthesized by used silica refractory 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 the well-crystallized β-Si3N4 nano-belts were grown with thickness of 50-150nm and width of 3-5 μm.The relatively purer β-Si3N4 were prone to be thin films with thickness of 150nm,while the as-grown SiCN (impurity β-Si3N4 with C element) 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-belts and SiCN nanorods.
Used Silica Refractory Brick Silicon nitride (β-Si3N4) Nano-belt SiCN Nanorod Carbothermal Reduction Nitridation Growth Mechanism
Wenjuan Li Zihe Pan Zhaohui Huang Yan-gai Liu Minghao Fang
School of Materials Science and Technology,China University of Geosciences,Beijing 100083,China
国际会议
桂林
英文
1-4
2012-07-16（万方平台首次上网日期，不代表论文的发表时间）