Low-density Polyethylene (LDPE) was modified by using simultaneously 2 additives. Each additive had a specific attribute. Silicon was used. Using TEM with EELS, it was proved first that the passivated version constituted a double core consisting of Si surrounded by a nanometric layer of amorphous Silica (SiO2). Thus Si brought the possibility of an enlarged dielectric storage capacity with a barrier controlling the electrical charge movement (via SiO2). Silicon was used in conjunction with Carbon Black (CB) and produced, upon some conditions, enlarged dielectric storage yet with intempestive conversion to a conducting state. At low voltage, LDPE containing 5 wt% CB and 3% or 0.25% Si remained insulating materials. During breakdown conditions with a 2 kV/s rise, only the composite containing 0.25 wt% CB and 3 wt% Si exhibited insulating conditions. These results draw attention to the importance of performing material system evaluation under dynamical conditions.
Dielectric design of LDPE properties: With the help of double-core Si/SiO<inf>2</inf> and Carbon Black / Frechette, M.F.; Veillette, R.; Trudeau, M.; Pirondelli, A.; Fabiani, D.; Anh, T. Tran; Ghafarizadeh, B.; David, E.; El-Khoury, D.; Castellon, J.; Arinero, R.. - ELETTRONICO. - (2016), pp. 52-57. (Intervento presentato al convegno 2016 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) tenutosi a Toronto, Canada nel 2016) [10.1109/CEIDP.2016.7785471].
Dielectric design of LDPE properties: With the help of double-core Si/SiO2 and Carbon Black
FABIANI, DAVIDE;
2016
Abstract
Low-density Polyethylene (LDPE) was modified by using simultaneously 2 additives. Each additive had a specific attribute. Silicon was used. Using TEM with EELS, it was proved first that the passivated version constituted a double core consisting of Si surrounded by a nanometric layer of amorphous Silica (SiO2). Thus Si brought the possibility of an enlarged dielectric storage capacity with a barrier controlling the electrical charge movement (via SiO2). Silicon was used in conjunction with Carbon Black (CB) and produced, upon some conditions, enlarged dielectric storage yet with intempestive conversion to a conducting state. At low voltage, LDPE containing 5 wt% CB and 3% or 0.25% Si remained insulating materials. During breakdown conditions with a 2 kV/s rise, only the composite containing 0.25 wt% CB and 3 wt% Si exhibited insulating conditions. These results draw attention to the importance of performing material system evaluation under dynamical conditions.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
