使用CO激光束将二氧化硅超快碳热还原为硅。

Ultrafast carbothermal reduction of silica to silicon using a CO laser beam.

作者信息

Maeng Seok-Ho, Lee Hakju, Park Min Soo, Park Suhyun, Jeong Jaeki, Kim Seongbeom

机构信息

Department of Mechanical Design Engineering, Kangwon National University, Samcheok-si, 25913, Republic of Korea.

Laboratory of Photomolecular Science, Institute of Chemical Sciences Engineering, Ecole Polytechnique Federale de Lausanne (EPFL), 1015, Lausanne, Switzerland.

出版信息

Sci Rep. 2020 Dec 10;10(1):21730. doi: 10.1038/s41598-020-78562-1.

DOI:10.1038/s41598-020-78562-1

PMID:33303838

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7729951/

Abstract

We report the extraction of silicon via a carbothermal reduction process using a CO 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.

摘要

我们报道了通过以CO激光束作为热源的碳热还原过程来提取硅。在用激光束照射几十秒后，二氧化硅和炭黑粉末混合物的表面变成褐色，并且通过拉曼位移测量观察到了结晶硅的清晰峰，证实了二氧化硅的碳热还原成功。详细解释了包括激光束强度、辐射时间、反应室内的氮气流量以及混合物中二氧化硅/炭黑的摩尔比等工艺参数对碳热还原过程的影响。