Enhanced nonlinear conductivity of silicone rubber composites with hybrid graphene and alumina for cable accessory

• DOI: 10.1016/j.polymertesting.2023.108080
• Publication Date: 2023-05-24T06:01:32Z
• Authors: Wuxinchen Yang; Yang Xue; Le Zhang; Yunfa Chen
• Keywords: Silicone rubber

The electric field distortion and charge accumulation in cable accessories are still challenges for high voltage direct current transmission (HVDC). Using silicone rubber (SR) based materials with nonlinear conductivity properties can ameliorate these problems accessories. Herein, SR composites hybrid filler network were prepared by adding graphene (G; 0.25 phr) alumina particles (Al2O3; 5–40 to obtain good relative breakdown strength, along thermal conductivity. SEM results showed that was well dispersed between Al2O3 a constructed the matrix. G/Al2O3/SR exhibited favorable electrical while sustaining strength under different temperature field. non-linear α of 0.25G/40Al2O3/SR composite reached 6.68 at 23 °C, whereas E0 49.1 kV/mm could comparable pure SR. Moreover, 0.25G/30Al2O3/SR 0.28 Wm−1K−1 which increased 114.98% compared This work suggests promising application as accessory.