Globally enhanced thermal, mechanical and electrical properties of current-field grading composites with self-assembly semiconducting grains on 3D cellulose aerogel scaffolds

Xu, Hao; Wang, Rui; Gou, Bin; Zhou, Jiangang; Li, Licheng; Xie, Congzhen

doi:10.1016/j.compscitech.2021.109197

Cited by 7 publications

(1 citation statement)

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“…Silicon rubber (SiR) is widely used as the main material system of nonlinear composites to get the advantages of steady mechanical behavior and excellent compatibility [4]. Such composites were reported to be promising as the new generation field grading materials in outdoor insulators, cable accessories, motor coil coating, power electronic packaging and protection of electronic devices [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

The degradation of silicone rubber composites with ZnO microvaristors under impulse voltage

Huang¹,

Yang²,

Yuan³

et al. 2022

J. Phys. D: Appl. Phys.

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In this study, the degradation behavior of silicone rubber (SiR) composites with ZnO microvaristors under impulse voltage were investigated. Typical impulse voltages with different amplitudes were applied to the samples, and the degraded threshold electric field (Eb) and nonlinear coefficient (α) of the samples were obtained by conductivity test after every impulse. Scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS) were used to characterize the micro performance of the samples. The failure of the SiR composites was found to be attributed to the aging behavior in the microstructure of ZnO microvaristors, which was divided into four stages caused by the precipitation of Bi2O3 and the dissipation of the honeycomb grain-boundary structure. The mechanism of degradation was internal local heat accumulation and damage of the microelement caused by the thermal stress, generated by impulse voltage.

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