Dielectric materials are electrical insulators that have the ability to become polarized when an electric field is applied to them.Unlike conductors and semiconductors,they do not allow electronic charges to flow free...Dielectric materials are electrical insulators that have the ability to become polarized when an electric field is applied to them.Unlike conductors and semiconductors,they do not allow electronic charges to flow freely;they slightly shift the charges from their average equilibrium positions during dielectric polarization.The polarization behavior of dielectric materials allows them to store and release electrical energy rapidly,which makes them essential for various applications in electronic and electrical power systems,such as energy harvesting,power conditioning,and power factor correction[1].All-organic dielectric polymers are an attractive alternative to ceramic dielectric materials owing to their breakdown strength,which can be more than one order of magnitude greater than that of ceramics(dielectric ceramics are more suitable for ultrahigh-frequency and high-temperature applications).Additionally,they have a unique failure mechanism that allows for the continuous operation at high electric fields,known as a‘‘graceful failure”[2].Furthermore,dielectric polymers are lightweight,have low density,and are excellently processable,rendering them highly suitable for the large-scale production at a low cost.展开更多
基金supported by the National Natural Science Foundation of China(52003153 and U19A20105)the Natural Science Foundation of Shanghai(23ZR1427900)+1 种基金the Program of Shanghai Academic Research Leader(21XD1401600)the State Key Laboratory of Electrical Insulation and Power Equipment(EIPE23203 and EIPE21206)。
文摘Dielectric materials are electrical insulators that have the ability to become polarized when an electric field is applied to them.Unlike conductors and semiconductors,they do not allow electronic charges to flow freely;they slightly shift the charges from their average equilibrium positions during dielectric polarization.The polarization behavior of dielectric materials allows them to store and release electrical energy rapidly,which makes them essential for various applications in electronic and electrical power systems,such as energy harvesting,power conditioning,and power factor correction[1].All-organic dielectric polymers are an attractive alternative to ceramic dielectric materials owing to their breakdown strength,which can be more than one order of magnitude greater than that of ceramics(dielectric ceramics are more suitable for ultrahigh-frequency and high-temperature applications).Additionally,they have a unique failure mechanism that allows for the continuous operation at high electric fields,known as a‘‘graceful failure”[2].Furthermore,dielectric polymers are lightweight,have low density,and are excellently processable,rendering them highly suitable for the large-scale production at a low cost.
