Synthesis of industrial diamond film from woody biomass feedstock at low temperature and normal pressure

2014 Fiscal Year Final Research Report

• Project/Area Number: 25630027
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Production engineering/Processing studies
• Research Institution: Osaka University
• Principal Investigator: OHMI Hiromasa 大阪大学, 工学(系)研究科(研究院), 助教 (00335382)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 木質バイオマス / 白炭 / 機能性炭素膜 / 水素プラズマ / マイクロ波 / メタン生成 / 材料精製

Outline of Final Research Achievements

In this study, we aimed to synthesize a diamond thin film as a functional carbon thin film from charcoal feedstock by using novel high-pressure hydrogen plasma without ultrahigh pressure and temperature process conditions. As a result, it was found that methane was mainly generated through the chemical reaction between hydrogen plasma and charcoal. Furthermore, the generated gas species is independent on plasma parameter, as far as the glow discharge was maintained. The mineral component contained in the charcoal remains on the charcoal surface after hydrogen plasma etching. Therefore, it was revealed that the proposed deposition method has a refinement effect of carbon feedstock. At the present stage, because the graphite-like film can be obtained by the proposed method, it can be found that this method has potential to prepare the graphene film.

Free Research Field

プラズマ科学、材料科学、特殊加工