Title :
Influence of moisture absorption on space charge property of MgO/LDPE nanocomposite
Author :
Yang, J.M. ; Wang, Xiongfei ; Zheng, Cong ; Zhao, Hang ; Lei, Q.Q.
Author_Institution :
Key Lab. of Eng. Dielectr. & Its Applic., Harbin Univ. of Sci. & Technol., Harbin, China
Abstract :
In order to understand the change rule and its mechanism for the space charge property of Magnesium oxide (MgO)/ LDPE nanocomposites after damp, the moisture absorption weight and space charge properties of wet LDPE and MgO/LDPE were studied. Experiments results show that moisture absorption has a strong influence on dielectric properties of MgO/LDPE nanocomposite. After nanocomposite had been exposed for a week under the 40% relative humidity conditions, the improved space charge property of the composite at high electric field above 20kV/mm, were decreased obviously compare to dry MgO/LDPE. It is believed that moisture absorption may lead to a weakening of original interfacial charge distribution. On contrary, at low electric field, the MgO/LDPE system showed the strong suppression effect of aditional carriers migration caused by absorbed moisture.
Keywords :
absorption; magnesium compounds; moisture; nanocomposites; polyethylene insulation; space charge; LDPE nanocomposite; MgO; carrier migration suppression effect; dielectric properties; high electric field; interfacial charge distribution; low electric field; moisture absorption weight; relative humidity conditions; space charge property; wet LDPE; Absorption; Cable insulation; Charge measurement; Dielectrics; Electrodes; Moisture; Space charge;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena (CEIDP), 2013 IEEE Conference on
Conference_Location :
Shenzhen
DOI :
10.1109/CEIDP.2013.6748257
