Effects of surface nonlinear conductive coatings on surface charge behavior of alumina-filled epoxy resin spacers

2019 ◽  
Author(s):  
Jian-Yi Xue ◽  
Jun-Hong Chen ◽  
Han Wang ◽  
Bao-Hong Guo ◽  
Jun-Bo Deng ◽  
...  
Keyword(s):  
Surface Charge ◽  
Epoxy Resin ◽  
Conductive Coatings

Surface charge decay of epoxy resin treated by AP-DBD deposition and direct fluorination

2019 ◽  
Vol 26 (3) ◽  
pp. 768-775
Author(s):  
Cheng Zhang ◽  
Yiyang Ma ◽  
Fei Kong ◽  
Ruixue Wang ◽  
Chengyan Ren ◽  
...  
Keyword(s):  
Surface Charge ◽  
Epoxy Resin ◽  
Direct Fluorination ◽  
Charge Decay

scholarly journals Molecular Structure Modulated Trap Distribution and Carrier Migration in Fluorinated Epoxy Resin

Molecules ◽  
2020 ◽  
Vol 25 (13) ◽  
pp. 3071 ◽  
Author(s):  
Jin Li ◽  
Yufan Wang ◽  
Zhaoyu Ran ◽  
Hang Yao ◽  
Boxue Du ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Surface Charge ◽  
Epoxy Resin ◽  
Mobility Model ◽  
Molecular Orbitals ◽  
Chemical Calculation ◽  
Dissipation Process ◽  
Highest Occupied Molecular Orbitals ◽  
Lowest Unoccupied Molecular Orbitals ◽  
Positively Charged

Surface charge accumulation on epoxy insulators is one of the most serious problems threatening the operation safety of the direct current gas-insulated transmission line (GIL), and can be efficiently inhibited by the surface modification technology. This paper investigated the mechanisms of fluorination modulated surface charge behaviors of epoxy resin through quantum chemical calculation (QCC) analysis of the molecular structure. The results show that after fluorination, the surface charge dissipation process of the epoxy sample is accelerated by the introduced shallow trap sites, which is further clarified by the carrier mobility model. The electron distribution probability of the highest occupied molecular orbitals (HOMO) under positive charging and the lowest unoccupied molecular orbitals (LUMO) under negative charging shows distinctive patterns. It is illustrated that electrons are likely to aggregate locally around benzenes for the positively charged molecular structure, while electrons tend to distribute all along the epoxy chain under negatively charging. The calculated results verify that fluorination can modulate surface charge behaviors of epoxy resin through redesigning its molecular structure, trap distribution and charging patterns.

Effects of nanosecond pulse voltage parameters on characteristics of surface charge for epoxy resin

2018 ◽  
Vol 25 (6) ◽  
pp. 2058-2066 ◽  
Author(s):  
Fei Kong ◽  
Shuai Zhang ◽  
Haofan Lin ◽  
Chengyan Ren ◽  
Cheng Zhang ◽  
...  
Keyword(s):  
Surface Charge ◽  
Epoxy Resin ◽  
Nanosecond Pulse ◽  
Pulse Voltage

The impact of nano-coating on surface charge accumulation of epoxy resin insulator: characteristic and mechanism

2018 ◽  
Vol 51 (24) ◽  
pp. 245303 ◽  
Author(s):  
Bo Qi ◽  
Chunjia Gao ◽  
Yuzhen Lv ◽  
Chengrong Li ◽  
Youping Tu ◽  
...  
Keyword(s):  
Surface Charge ◽  
Epoxy Resin ◽  
Charge Accumulation ◽  
Nano Coating ◽  
The Impact
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