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The effect of gradient conductivity of doped BiFeO3 as filler on the surface insulation performance of epoxy composite
- Source :
- Yin, K, Yan, J, Zhang, H, Duan, Q, Wang, Q, Zheng, C, Zhang, Z & Xie, Q 2020, ' The effect of gradient conductivity of doped BiFeO3 as filler on the surface insulation performance of epoxy composite ', Journal of Physics D: Applied Physics, vol. 53, 395502 . https://doi.org/10.1088/1361-6463/ab93f4
- Publication Year :
- 2020
- Publisher :
- IOP Publishing, 2020.
-
Abstract
- In this paper, we studied the effect of filler conductivity on the surface insulation of composites. We proposed using different valence element doping as a strategy to prepare filler with gradient conductivity. The pristine BiFeO3 (BFO), Bi0.95Ca0.05FeO3, and Bi0.95Sm0.05FeO3 nanoparticles were prepared to fill into epoxy resin. The Rietveld refinement of the x-ray diffraction patterns was performed to investigate the transition of the lattice structure. According to the Kubelka–Munk function, the energy bandgap was calculated to verify the regulation of the BFO conductivity. Subsequently, we measured the flashover voltage of the composites with three types of BFO in ambient and vacuum atmosphere, respectively. We found the vacuum flashover is more sensitive to filler conductivity, and BFO with higher conductivity as filler is more conducive to surface insulation, whether in the air or vacuum. Finally, the optimal BFO bandgap of 2.1819 eV is determined for enhancing surface insulation of composites. Our research supplies a novel method for constructing high insulation composites for more wide applications and provides a scientific basis on flashover mechanism from the perspective of filler characteristics.
- Subjects :
- 010302 applied physics
Materials science
Acoustics and Ultrasonics
Rietveld refinement
Band gap
Doping
Composite number
Nanoparticle
02 engineering and technology
Epoxy
Conductivity
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
visual_art
0103 physical sciences
visual_art.visual_art_medium
Arc flash
Composite material
0210 nano-technology
Subjects
Details
- ISSN :
- 13616463 and 00223727
- Volume :
- 53
- Database :
- OpenAIRE
- Journal :
- Journal of Physics D: Applied Physics
- Accession number :
- edsair.doi.dedup.....188c11569ab287ba1d255cf02acd0b66