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What is the material and structure of the electrode of the plasma cleaning machine

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11 Jan,2021

What is the material and structure of the electrode of the plasma cleaning machine:

 

Electrode material and structure of plasma cleaning machine:


In recent years, due to the practical application value of atmospheric pressure plasma technology in industrial production and its application prospect in various industries, the enthusiasm of scientists from all over the world has been aroused, and the theory and technology of atmospheric pressure plasma technology have been developed rapidly. The whole process of charging and discharging under atmospheric pressure of plasma cleaning machine has unique characteristics, so its application is different from that of vacuum. The material and structure of electrode of plasma technology under atmospheric pressure are discussed.

 

Definition of dielectric barrier charge and discharge:

 

Dielectric barrier charge and discharge (DBD) is a heterogeneous gas charge and discharge caused by the insertion of a dielectric material between metal electrodes.

 

Basic electrode structure of cleaning equipment or plasma plasma cleaning machine processing system:

 

In general, the electrodes are two parallel surface electrodes, at least one of which is covered by a dielectric material. In order to ensure the reliability of charge and discharge, the distance between the two electrodes is only millimeters, and sinusoidal alternating current or DC pulse high voltage power supply is needed to achieve atmospheric discharge. Depending on the discharge condition, the excitation operating voltage and frequency, the glow will form in the middle of the electrode. A single filamentous discharge is composed of surface microdischarge or discharge band. The formation of glow requires rare gases such as nitrogen and helium, which can produce metastable particles.

 

Another type of electrode structure is in which the discharge is generated between two dielectric material layers in direct contact with the metal electrode. The double layer discharge structure is used to avoid the direct contact between plasma and metal electrode, which makes the plasma more uniform and the discharge wire more fine. Suitable for corrosive gas separation and high purity plasma system.

 

The electrode structure of the third type of plasma cleaning machine is columnar. The key of making the low-temperature plasma torch and modifying the irregular surface layer is to make the columnar electrode and the columnar structure discharge system. Because the appearance of products and materials and the requirements of production and processing are different, so the design of plasma electrode is very important for the equipment.

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