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Plasma Sci. Technol. ›› 2018, Vol. 20 ›› Issue (4): 045401.doi: 10.1088/2058-6272/aaa70b

• Low Temperature Plasma • Previous Articles     Next Articles

Investigation on the mode of AC discharge in H2O affected by temperature

Siyuan DONG (董思远)1, Shaomeng GUO (郭少孟)1, Dan WEN (文旦)1 , Xiaoliang TANG (唐晓亮)2 and Gao QIU (邱高)2   

  

  1. 1 College of Science, Donghua University, Shanghai 201620, People’s Republic of China 2 College of Material Science and Engineering, Donghua University, Shanghai 201620, People’s Republic of China
  • Received:2017-12-22 Published:2018-01-10
  • Supported by:

    This work is supported by the Chinese Universities Scientific Fund (2232014G1-39, DHU-16T10903), the Innovation Program of Shanghai Municipal Education Commission (DHU-X171091605), and the Innovation Funding Project of Donghua University (EG201615).

Abstract:

In this paper, some experimental equipment has been set up for kHz frequency AC liquid phase discharge, and the temperature of the deionized water was regulated during discharge. The electrical characteristics and spectra of liquid phase H2O discharge have been investigated. Two discharge modes, high temperature and low temperature, were both found. The results show that there are two mechanisms in liquid phase discharge: the field ionization mechanism and the breakdown mechanism of bubbles, and these two mechanisms are always developed simultaneously; the temperature is the key factor determining the discharge type. At high temperature, the breakdown of bubbles is the main discharge mechanism, and the field ionization mechanism occurs mainly at low temperature.

Key words: liquid phase discharge, temperature, H2O, kHz frequency