Method for producing noncrystal SiO2 coated SiC coaxial nano cable

Abstract

The method includes the following steps: (1) taking certain amount of Si powder and SiO2, powder for ball grinding treatment, (2) putting them into agate mortar for sufficient mixing with their ratio of Si:SiO2=1:1.2-1.5, (3) carrying on catalyst addition processing to C / C composite substrate, (4) putting above two and carbon cloth into graphite reaction chamber, (4) placing the chamber in vertical vacuum furnace, (5) raising temperature of furnace to 900-1000 degree.C and vacuum-pumping pressure of the furnace to 400 torr and (6) raising temperature to 1200-1300 degree c, connecting C3H6 gas for 5-10 minute, holding temperature for 10-20 minute and cooling it down to room temperature.

Description

Technical field: [0001] The present invention relates to a kind of amorphous SiO 2 The synthesis method of coated SiC coaxial nanocable can synthesize semiconductor SiC with good performance as the core, and insulator SiO 2 A coaxial nanocable for the shell. Background technique: [0002] A coaxial nanocable refers to a nanowire whose core is a semiconductor or a conductor, the outer layer is covered with a heterogeneous shell, and the outer shell and the core nanowire are coaxial. Due to the unique properties of this kind of materials, rich scientific connotations, broad application prospects and strategic position in future nanostructure devices. Therefore, the researchers proposed the following method on how to obtain coaxial nanocables. Arc discharge method: It was proposed by French scientist Colliex in 1997, and C-BN-C nanotubes with sandwich geometry were obtained by this method [published in Suenaga K., Colliex C., Demoncy N., Loiseau A., Pascard H . Science 278 ...

AI Technical Summary

Problems solved by technology

However, there are still some deficiencies in the existing methods for synthesizing coaxial nanocables, such as the need for high synthesis temperature (1800°C) or the complexity of the synthesis process, etc.; the amount of synthesized products is relatively small, which is not suitable for future scale-up production, but also limits people's research on the novel properties and possible applications of SiC coaxial nanocables

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