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2021, Volume 16, Issue 1

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Frontiers of Mechanical Engineering >> 2021, Volume 16, Issue 1 doi: 10.1007/s11465-020-0603-5

Characterisation of a microwave induced plasma torch for glass surface modification

. Surface Engineering and Precision Institute, Cranfield University, Cranfield MK43 0AL, UK.. Centre for Micro/Nano Manufacturing Technology (MNMT-Dublin), University College Dublin, Dublin D04 V1W8, Ireland.. Manufacturing Technology Centre (MTC), Coventry CV7 9JU, UK.. Key Laboratory of E&M, Ministry of Education & Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, China.. Centre for Electronic Warfare, Information and Cyber, Cranfield University, Shrivenham SN6 8LA, UK.. Adtec Plasma Technology Co., Ltd., Fukuyama, Hiroshima 712-0942, Japan

Received: 2020-10-29 Accepted: 2020-12-07 Available online: 2020-12-07
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Abstract

Microwave induced plasma torches find wide applications in material and chemical analysis. Investigation of a coaxial electrode microwave induced plasma (CE–MIP) torch is conducted in this study, making it available for glass surface modification and polishing. A dedicated nozzle is designed to inject secondary gases into the main plasma jet. This study details the adaptation of a characterisation process for CE–MIP technology. Microwave spectrum analysis is used to create a polar plot of the microwave energy being emitted from the coaxial electrode, where the microwave energy couples with the gas to generate the plasma jet. Optical emission spectroscopy analysis is also employed to create spatial maps of the photonic intensity distribution within the plasma jet when different additional gases are injected into it. The CE–MIP torch is experimentally tested for surface energy modification on glass where it creates a super-hydrophilic surface.

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