1. Effects of ZnO magnetron sputtering on surface charge and flashover voltage of oil-impregnated paper
- Author
-
Boxue Du, Jinpeng Jiang, Jin Li, and Wenbo Zhu
- Subjects
Electron mobility ,Scanning electron microscope ,surface potential decay ,flashover ,time 30.0 min ,radiofrequency magnetron sputtering method ,converter transformers ,dry paper ,cellulose matrix ,surface morphology ,Composite material ,chemical bond ,time 7.5 min ,carrier mobility ,sputter deposition ,sputtered zno particles ,trap distribution ,sputtered samples ,structural modification ,impregnated insulation ,wide band gap semiconductors ,surface conductivity ,bonding mode ,oil-impregnated sputtered paper ,surface flashover strength ,atr-ir spectroscopy ,insulating oils ,surface charging ,Attenuated total reflection ,zno ,flashover voltage ,time 15.0 min ,zinc compounds ,time 0.0 min ,lcsh:TK1-9971 ,scanning electron microscopy ,surface charge ,dc flashover strength ,Materials science ,surface potential ,infrared spectra ,Electrical insulation paper ,lcsh:QC501-721 ,Energy Engineering and Power Technology ,cellulose paper ,flashover strength ,Surface conductivity ,attenuated total reflection ,Sputtering ,lcsh:Electricity ,Surface charge ,Electrical and Electronic Engineering ,volume conductivities ,hydrogen bond ,paper ,zno magnetron sputtering ,ii-vi semiconductors ,Sputter deposition ,sputtered insulating paper ,mechanical property ,tensile strength ,lcsh:Electrical engineering. Electronics. Nuclear engineering ,charge dissipation characteristics - Abstract
With the aim of exploring an alternative method of nano-doping in cellulose paper and improving flashover strength of oil-impregnated paper, radio frequency (RF) magnetron sputtering method is introduced into the structural modification of insulating paper for converter transformers. In this experiment, insulating paper was treated with ZnO sputtering for 0, 7.5, 15 and 30 min, respectively. The surface morphology of dry paper was observed with a scanning electron microscope. The bonding mode of sputtered ZnO particles with cellulose matrix was investigated via attenuated total reflection infrared (ATR-IR) spectroscopy and mechanical property of the sputtered samples were studied. Surface and volume conductivities of the oil-impregnated sputtered paper were measured. Moreover, the charge dissipation characteristics of sputtered insulating paper was investigated by means of surface potential decay. In addition, trap distribution and carrier mobility of specimen were further obtained. Finally, the DC flashover strength were tested. The results showed that ZnO magnetron sputtering had a distinct influence on the structure of the insulating paper, resulting in the formation of hydrogen bond and chemical bond and an increase of the surface and volume conductivities. ZnO sputtering was found to decrease the initial potential and accelerate charge decay. Moreover, appropriate sputtering enhanced the surface flashover strength.
- Published
- 2019