The effect of different materials on plasma generation at atmospheric pressure

Ismail, Sabrina (2021) The effect of different materials on plasma generation at atmospheric pressure. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Plasma is the fourth state of matter created after gas when energy is continuously supplied to neutral gas and charge carriers form. Fluorescent light and aurora are the other plasma in nature that available in vacuum space. However, the process for plasma discharge is difficult and considered expensive, also the entire process is carried out under low pressure conditions (Non-Thermal Equilibrium Plasma). Thus, a 2.45 GHz domestic microwave oven was used in this study to generate plasma in air at atmospheric pressure (Thermal Equilibrium Plasma). Copper (Cu) electrode samples of 30 mm, 60 mm, 120 mm, and 180 mm in length were prepared to determine the ideal length of electrode for plasma discharge with power output modes of 55% (medium), 77% (medium-high), and 100% (medium). Afterwards, Aluminium (Al), Zinc (Zn), Lead (Pb), Iron (Fe), and Brass were used to evaluate and compare the ability of each electrode on plasma generation at atmospheric pressure. Plasma generation was observed at the electrode tip in air at atmospheric pressure. According to the studies, in terms of the time taken to discharge plasma, the power consumption, and the thermal conductivity of material, the finding concludes that Copper (Cu) is the most suitable material for plasma generation followed by Brass, Aluminium (Al), Iron (Fe), Zinc (Zn) and Lead (Pb) also the ideal length of the electrode on plasma generation is 60 mm with using medium-high power mode.

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