Ultrafast carbothermal reduction of silica to silicon using a CO2 laser beam
| Autor: | Min Soo Park, Seok-Ho Maeng, Jaeki Jeong, Suhyun Park, Seongbeom Kim, Hakju Lee |
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| Předmět: |
raman
Materials science Silicon Physics::Instrumentation and Detectors Science sio2 Analytical chemistry chemistry.chemical_element Physics::Optics 02 engineering and technology 010402 general chemistry 01 natural sciences size symbols.namesake dioxide Carbothermic reaction Irradiation Crystalline silicon electrochemical reduction Multidisciplinary model Carbon black 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry symbols Medicine 0210 nano-technology Raman spectroscopy high-purity silicon Ultrashort pulse Beam (structure) |
| Zdroj: | Scientific Reports, Vol 10, Iss 1, Pp 1-6 (2020) |
| Popis: | We report the extraction of silicon via a carbothermal reduction process using a CO2 laser beam as a heat source. The surface of a mixture of silica and carbon black powder became brown after laser beam irradiation for a few tens of seconds, and clear peaks of crystalline silicon were observed by Raman shift measurements, confirming the successful carbothermal reduction of silica. The influence of process parameters, including the laser beam intensity, radiation time, nitrogen gas flow in a reaction chamber, and the molar ratios of silica/carbon black of the mixture, on the carbothermal reduction process is explained in detail. |
| Databáze: | OpenAIRE |
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