Innovative Alumina Reduction Technology Using a Laser Plasma Wind Tunnel

2016 Fiscal Year Final Research Report

• Project/Area Number: 26630439
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Aerospace engineering
• Research Institution: The University of Tokyo
• Principal Investigator: KOMURASAKI Kimiya 東京大学, 大学院工学系研究科(工学部), 教授 (90242825)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: エネルギー / レーザー / 金属還元 / アブレーション / 放電

Outline of Final Research Achievements

Laser power was irradiated directly on an alumina rod and heated surface of alumina to the temperature required for dissociation, over 4400 K. Ar gas was supplied into the chamber. At the ambient pressure of 1.0 atm, ablation plume ejected with strong emission. By the emission spectroscopy, the line spectra of atomic Al I were detected from ablation plume and alumina was successfully reduced using laser without reducing agents. At the laser power was from 1.0-2.0 kW, the high emission intensity of Al I was observed in the ablation plume. 1.5 kW laser reduced 5.0 times and 2.0 kW reduced 9.4 times as much alumina as 1.0 kW.

Free Research Field

航空宇宙工学