The Effects Induced by Microwave Field upon Tungsten Wires of Different Diameters
1
Institute of Space Science, MG-36, 077125 Magurele, Romania
2
National Institute for Laser, Plasma and Radiation Physics, Laser Department, 409 Atomistilor St., 077125 Magurele, Romania
3
Extreme Light Infrastructure for Nuclear Physics, ELI-NP, HH-IFIN, 077125 Magurele, Romania
*
Author to whom correspondence should be addressed.
Academic Editors: Antonio Politano, Giorgio Speranza and Jae Young Kim
Materials 2021, 14(4), 1036; https://doi.org/10.3390/ma14041036
Received: 18 December 2020 / Revised: 16 February 2021 / Accepted: 18 February 2021 / Published: 22 February 2021
(This article belongs to the Special Issue Advances in Plasmas)
The effects induced by microwave field upon tungsten wires of different diameters were investigated. Tungsten wires with 0.5 and 1.0 mm diameters were placed in the focal point of a single-mode cylindrical cavity linked to a microwave generator and exposed to microwave field in ambient air. The experimental results showed that the 0.5 mm diameter wire was completely vaporized due to microwaves strong absorption, while the wire with 1 mm diameter was not ignited. During the interaction between microwaves and tungsten wire with 0.5 mm diameter, a plasma with a high electronic excitation temperature was obtained. The theoretical analysis of the experiment showed that the voltage generated by metallic wires in interaction with microwaves depended on their electric resistance in AC and the power of the microwave field. The physical parameters and dimension of the metallic wire play a crucial role in the ignition process of the plasma by the microwave field. This new and simple method to generate a high-temperature plasma from a metallic wire could have many applications, especially in metal oxides synthesis, metal coatings, or thin film deposition.
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Keywords:
microwave field; plasma; wave guides; metallic wires; electric resistance
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MDPI and ACS Style
Mogildea, M.; Mogildea, G.; Craciun, V.; Zgura, S.I. The Effects Induced by Microwave Field upon Tungsten Wires of Different Diameters. Materials 2021, 14, 1036. https://doi.org/10.3390/ma14041036
AMA Style
Mogildea M, Mogildea G, Craciun V, Zgura SI. The Effects Induced by Microwave Field upon Tungsten Wires of Different Diameters. Materials. 2021; 14(4):1036. https://doi.org/10.3390/ma14041036
Chicago/Turabian StyleMogildea, Marian; Mogildea, George; Craciun, Valentin; Zgura, Sorin I. 2021. "The Effects Induced by Microwave Field upon Tungsten Wires of Different Diameters" Materials 14, no. 4: 1036. https://doi.org/10.3390/ma14041036
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