TY - JOUR
T1 - Space charge distributions in two-layered LDPE/MgO nanocomposites exhibiting superior insulation performance
AU - Kanegae, Etsu
AU - Ishimoto, Kazuyuki
AU - Tanaka, Toshikatsu
AU - Ohki, Yoshimichi
AU - Sekiguchi, Yoitsu
AU - Murata, Yoshinao
AU - Reddy, Chandupatla Chakradhar
PY - 2010/1/1
Y1 - 2010/1/1
N2 - Recently polymer nanocomposite has been attracting much attention as an emerging insulating material. In this paper, we measured space charge distributions for two-layered dielectric films consisting of certain combination of low-density polyethylene (LDPE) and its nanocomposite with magnesia nano-fillers during the application of dc electric field of 25 kV/mm or 100 kV/mm. Both at room temperature and 50 °C, space charge is formed at the interface of two different materials to maintain the continuity of current when the electric field is 25 kV/mm, while packet-like charge appears only in the LDPE when the electric field is 100 kV/mm. These phenomena are explained by assuming that the nano-fillers effectively suppress the increase in conductivity induced by the high electric field.
AB - Recently polymer nanocomposite has been attracting much attention as an emerging insulating material. In this paper, we measured space charge distributions for two-layered dielectric films consisting of certain combination of low-density polyethylene (LDPE) and its nanocomposite with magnesia nano-fillers during the application of dc electric field of 25 kV/mm or 100 kV/mm. Both at room temperature and 50 °C, space charge is formed at the interface of two different materials to maintain the continuity of current when the electric field is 25 kV/mm, while packet-like charge appears only in the LDPE when the electric field is 100 kV/mm. These phenomena are explained by assuming that the nano-fillers effectively suppress the increase in conductivity induced by the high electric field.
KW - Conduction current
KW - Insulating materials
KW - Low-density polyethylene
KW - Polymer nanocomposite
KW - Space charge
KW - Two-layered dielectrics
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U2 - 10.1541/ieejfms.130.349
DO - 10.1541/ieejfms.130.349
M3 - Article
AN - SCOPUS:77953563457
SN - 0385-4205
VL - 130
SP - 349-354+9
JO - IEEJ Transactions on Fundamentals and Materials
JF - IEEJ Transactions on Fundamentals and Materials
IS - 4
ER -