[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China
[2] Shanghai Jiao Tong Univ, Sch Aeronaut & Astronaut, Shanghai 200240, Peoples R China
[3] Shanghai Jiao Tong Univ, Shanghai Key Lab Elect Insulat & Thermal Aging, Shanghai Key Lab Polymer & Elect Insulat, Shanghai 200240, Peoples R China
[4] Univ Warwick, WMG, Int Inst Nanocomposites Mfg, Coventry CV4 7AL, W Midlands, England