Effects of carbon nanotube/epoxy semi-conductive layer on space charge injection in epoxy resin

2016 ◽  
Author(s):  
He Li ◽  
Hua Feng ◽  
Xuejie Jiang ◽  
Chuang Wang ◽  
Ding Li ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Space Charge ◽  
Epoxy Resin ◽  
Charge Injection ◽  
Conductive Layer

scholarly journals Effect of Semi-Conductive Layer Modified by Magnetic Particle SrFe12O19 on Charge Injection Characteristics of HVDC Cable

Polymers ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1309 ◽  
Author(s):  
Yanhui Wei ◽  
Mingyue Liu ◽  
Jiaxing Wang ◽  
Guochang Li ◽  
Chuncheng Hao ◽  
...  
Keyword(s):  
Space Charge ◽  
Magnetic Particles ◽  
Charge Injection ◽  
Direct Access ◽  
Polarization Current ◽  
Insulation Material ◽  
Conductive Layer ◽  
Depolarization Current ◽  
Steady State Current ◽  
Secondary Injection

For high voltage direct current (HVDC) cable, a semi-conductive layer lies between the conductor and the insulation layer; as the charge migrates the path from the conductor to the insulation material, it will affect space charge injection. In this work, the research idea of changing the injection path of moving charges within semi-conductive layer by magnetic particles was proposed. Semi-conductive composites with different SrFe12O19 contents of 1 wt.%, 5 wt.%, 10 wt.%, 20 wt.%, and 30 wt.% were prepared, and the amount of injected charges in the insulation sample was characterized by space charge distribution, polarization current, and thermally-stimulated depolarization current. The experimental results show that a small amount of SrFe12O19 can significantly reduce charge injection in the insulation sample, owing to the deflection of the charge migration path, and only part of the electrons can enter the insulation sample. When the content is 5 wt.%, the insulation sample has the smallest charge amount, 0.89 × 10−7 C, decreasing by 37%, and the steady-state current is 6.01 × 10−10 A, decreasing by 22%. When SrFe12O19 content exceeds 10 wt.%, the charge suppression effect is not obvious and even leads to the increase of charge amount in the insulation sample, owing to the secondary injection of charges. Most moving charges will deflect towards the horizontal direction and cannot direct access to the insulation sample, resulting in a large number of charges accumulation in the semi-conductive layer. These charges will seriously enhance the interface electric field near the insulation sample, leading to the secondary injection of charges, which are easier to inject into the insulation sample.

Investigation of space charge behavior in self-healing epoxy resin composites

2021 ◽  
Author(s):  
Muhammad Zeeshan khan ◽  
Muhammad Hamza Younes ◽  
Aurang Zaib ◽  
Umar Farooq ◽  
Asim khan ◽  
...  
Keyword(s):  
Space Charge ◽  
Epoxy Resin ◽  
Resin Composites ◽  
Self Healing ◽  
Epoxy Resin Composites

Incorporation of epoxy resin and carbon nanotube into silica/siloxane network for improving thermal properties

2016 ◽  
Vol 51 (19) ◽  
pp. 9057-9073 ◽  
Author(s):  
Saeid Najafi-Shoa ◽  
Hossein Roghani-Mamaqani ◽  
Mehdi Salami-Kalajahi ◽  
Reza Azimi ◽  
Meysam Gholipour-Mahmoudalilou
Keyword(s):  
Thermal Properties ◽  
Carbon Nanotube ◽  
Epoxy Resin
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