Title :
Charge injection in dielectric liquids under mercury electrode
Author :
Wang, Min-Sheng ; Hao, Lei ; Weifang Li ; Liu, Ziyu
Author_Institution :
Xi´´an Jiaotong Univ., Shaanxi, China
Abstract :
The voltage-current characteristics of dodecyl benzene (DDB), transformer oil, mineral oil, and silicone oil have been investigated at different temperatures under ramp voltage (up until breakdown occurred) at a ramping speed of 100 V/s. Mercury was used as an electrode of sphere (Al or Cu)-plate (Hg) electrode systems. The work function of Hg derived from the electron emission (or charge injection) mechanisms was on the order of a few electronvolts, which was much larger than those of Al and Cu in the same case. This was attributed to the existence of few surface states because of Hg´s smooth surface caused by the liquid surface tension
Keywords :
dielectric properties of liquids and solutions; electric breakdown of liquids; electrodes; electron emission; mercury (metal); organic insulating materials; Al electrodes; Cu electrodes; DDB; Hg electrodes; charge injection; dielectric liquids; dodecyl benzene; electron emission; liquid surface tension; mineral oil; ramp voltage; ramping speed; silicone oil; sphere plate electrode system; surface states; temperatures; transformer oil; voltage-current characteristics; work function; Breakdown voltage; Dielectric liquids; Electrodes; Electron emission; Mercury (metals); Minerals; Oil insulation; Petroleum; Surface tension; Temperature;
Conference_Titel :
Conduction and Breakdown in Dielectric Liquids, 1990. ICDL 1990. Conference Record., 10th International Conference on
Conference_Location :
Grenoble
DOI :
10.1109/ICDL.1990.202886
