Open AccessPerformance of silicone rubber composites using boron nitride to replace alumina tri‐hydrate
Author(s) -
Chen Xin,
Wang Jiaqi,
Zhang Chong,
Yang Wei,
Lin Jun,
Bian Xingming,
He Shaojian
Publication year - 2021
Publication title -
high voltage
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.732
H-Index - 20
ISSN - 2397-7264
DOI - 10.1049/hve2.12062
Subject(s) - materials science , composite material , silicone rubber , boron nitride , dielectric , ultimate tensile strength , composite number , dielectric loss , natural rubber , shore durometer , thermal conductivity , hydrate , filler (materials) , chemistry , organic chemistry , optoelectronics
Boron nitride (BN) has attracted increasing attention as a filler using in insulating materials. In this work, by using an equal amount of BN to replace alumina tri‐hydrate (ATH), various SR/BN/ATH composites were prepared, and for comparison, vinyl tri‐methoxysilane (VTMS) was added to prepare SR/BN/ATH‐VTMS composites. With the increasing BN content, Shore A hardness, breakdown strength and thermal conductivity of the silicone rubber (SR) composites increased despite the tensile strength slightly reduced. By replacing all the ATH with BN, the SR composite showed a ∼47% increase in breakdown strength, reaching 33.8 kV mm −1 . The lower dielectric constant and dielectric loss were found for the SR composites with higher BN content, while the decreased dielectric loss and increased dielectric constant were achieved by the introduction of VTMS. Owing to the improved filler‐rubber interfacial interactions by adding VTMS, with the same BN content, all the SR/BN/ATH‐VTMS composites exhibited better property than the SR/BN/ATH composites. The best thermal conductivity of the SR composite reached 0.448 Wm −1 K −1 , ∼156% higher than that of the ATH filled SR composite.