Study of microwave-induced metal discharge under high pressure based on spectrum analysis

Xue, Chao; Mao, Yanpeng; Wang, Wenlong; Song, Zhanlong; Zhao, Xinbing; Sun, Jing; Ma, Chunyuan

doi:10.1080/09205071.2018.1515668

Cited by 7 publications

(2 citation statements)

References 25 publications

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“…The experimental results showed that various factors influenced the microwave discharge and acetone dissociation [7]. Other studies conducted under high pressure of nitrogen showed that plasma generation during interaction of the microwaves with metallic wires is caused by heating of the metalic wires having as effect an emmision of electrons by the thermoionic effect [8].…”

Section: Introductionmentioning

confidence: 88%

The assessment of the atmospheric air breakdown voltage generated by the interaction between microwaves and metallic wires

Mogildea

Zgura

et al. 2023

Phys. Scr.

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The aim of this research is to understand the plasma initiation process generated by metallic wires when interacting with high energy density microwaves. Lead (Pb) and molybdenum (Mo) wires of 0.5 mm diameter were investigated in this experiment. The end of the metallic wire was placed into the nodal point of a waveguide cavity attached to a microwave generator, where it was exposed to the high energy density of the microwave field. Following the interaction between microwaves and the metallic wire, a plasma was initiated having as effect the wire vaporization. The experiments were conducted in atmospheric air at ~1 bar pressure. From optical emission spectroscopy investigations it was observed that electronic excitation of the plasma has high values and it is in a local thermal equilibrium. The theoretical calculation of the voltages induced in the metallic wires when exposed to high magnitude of the microwave field are similar to those measured in air breakdown experiments. The SEM analysis of the tips of the metallic wires showed that the field effect process is responsible for the ignition of the metallic wires and plasma generation.

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Section: Introductionmentioning

confidence: 88%

The assessment of the atmospheric air breakdown voltage generated by the interaction between microwaves and metallic wires

Mogildea

Zgura

et al. 2023

Phys. Scr.

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“…Actually, not only carbon materials, but some metal (e.g. Fe and Al [4]) and dielectric objects, (e.g. SiO 2 [5] and Si [6] particles), and even grapes can produce plasma when heated by microwaves.…”

Section: Introductionmentioning

confidence: 99%

The mechanism of microwave-induced discharge between submillimeter active coke

Liu

Zhang

Zhou

et al. 2020

Plasma Sources Sci. Technol.

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Microwave-induced active coke discharge has been used in much research related to the environment and energy due to its kinetics and thermal effect. However, the mechanisms of discharge for submillimeter particles are still not clear. This paper presents evidence that the particle shape and gap distance between particles are the possible mechanisms of the microwave discharge. This paper also gives the scope of application of several mechanisms for different particulate materials. Submillimeter particles with about 40-110 • tip angle and micron gap distance have the best effect on microwave electric field enhancement. The gap effect is only applicable to materials with a large refractive index, in detail, n > 3 or k > 2 for a 300 μm particle. When the gap distance is too narrow, the electron loss from gap to particle surfaces is large enough, leading to the failure of discharge.

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On microwave drilling of metal-based materials at 2.45 GHz

Singh

Sharma

2020

Appl. Phys. A

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Study of microwave-induced metal discharge under high pressure based on spectrum analysis

Cited by 7 publications

References 25 publications

The assessment of the atmospheric air breakdown voltage generated by the interaction between microwaves and metallic wires

The assessment of the atmospheric air breakdown voltage generated by the interaction between microwaves and metallic wires

The mechanism of microwave-induced discharge between submillimeter active coke

On microwave drilling of metal-based materials at 2.45 GHz

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