The surface flashover is affected by many factors, such as roughness, nanofillers and chemical functional groups. In this research study, polyamide mesh was utilised a scaffold to systematically study the synergistic effect of micro structure/nanofiller/superhydrophobicity on flashover. Based dissolution resolidification method, were partially embedded into fabrics. Here, Al2O3 nanoparticles used typical non-conductive nanofiller, carbon nanotubes conductive nanofiller. Moreover, structure...

This work treats the Al2O3-ER sample surface as a dielectric barrier discharge fluorination (DBD-F), silicon deposition (DBD-Si), atmospheric-pressure plasma jet (APPJ-F) and (APPJ-Si). By comparing morphology, chemical components electrical parameters, diverse mechanism of different modification methods on improving flashover performance is revealed. The results show that voltage DBD-F samples largest (increased by 21.2% at most), while APPJ-F method has worst promotion effect. APPJ-Si...

The objective of this paper is to propose constructing a 2D ordinal fillers structure improve the breakdown strength BN/ER. By loading ferrite on and applying rotating magnetic field during curing process, epoxy composites with tiled plate-type BN are obtained. Considering side effect insulation properties, its minimum load under premise implementing determined, accordingly composite materials about 30% higher than that traditional BN/ER Furthermore, technological parameters treatment...

Abstract In this paper, plasma fluorination is combined with silicon deposition to achieve step gradient modification on an epoxy resin surface. The physicochemical characteristics of samples are investigated and the electrical performances measured. obtained results show that compared untreated single treated samples, by significantly improve flashover performance. According experiment simulation, mechanism explanations summarized as follows. First, it found conductivity can effectively...

Abstract With the increase of voltage level, surface flashover epoxy composite insulation material becomes an important issue, which restricts development UHV (Ultra High Voltage) transmission technology. In this article, a method using SiC skeleton to construct charge channel was proposed, can enhance performance composite. addition, we investigated influence structure on dissipation and voltage. At same time, explored synergistic mechanism Al 2 O 3 nanofillers characteristics resin. The...

The objective of this paper is to propose an equivalent fluorination method improve the DC surface insulation strength Al <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> O xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> /ER composites using fluorine-containing release agent (F-RA). By replacing conventional silicon series with a one, flashover voltage is, at best, raised 1.2 times original value, and charge characteristics are...

Abstract Alumina/epoxy composites are widely used in the manufacture of basin insulators, but their surfaces tend to accumulate charges under high‐voltage direct current (HVDC), which induce decline surface insulating property. In this article, modification method depositing ZrO 2 film sprayed by plasma atomization was proposed improve insulation performance material. Argon as discharge gas, and (NO 3 ) . x H O zirconium source. The morphology, roughness element content materials were...

Abstract Alumina/epoxy resin (Al 2 O 3 /EP) composite material is widely used in the manufacture of insulators. However, operation environment long‐term high‐voltage direct current will destroy Al /EP surface insulating performance. In this article, was modified by atmospheric pressure Ar and Ar/CF 4 plasma jet, its aging effect studied investigating physicochemical characteristics electrical performances sample 0 ~ 100 days after modification. The experimental results show that treatment...

In this paper, we studied the effect of filler conductivity on surface insulation composites. We proposed using different valence element doping as a strategy to prepare with gradient conductivity. The pristine BiFeO3, Bi0.95Ca0.05FeO3, and Bi0.95Sm0.05FeO3 nanoparticles were prepared fill into epoxy resin. Rietveld refinement XRD patterns was performed investigate transition lattice structure. According Kubelka–Munk function, energy bandgap calculated verify regulation BiFeO3 Subsequently,...

The development of low resistivity material to increase the rate capability Resistive Plate Chambers (RPCs) has been attracting more and attention recently. This paper presents a new type such material. is based on polyimide doped with carbon. electrical volume this could be controlled using different percentages doping standard thickness carbon films around 40 μm which does not allow use it as build RPC electrodes. To overcome this, we developed stress method make gap between two films. In...

The surface insulation properties of insulating material under DC voltage are closely related to the characteristics charge accumulation, and roughness these materials has a direct impact on distribution in vacuum.Therefore, it is significant study their connection.In this paper, based secondary electron emission avalanche model, accumulation polymethyl methacrylate (PMMA) with different was simulated by using particle cell Monte Carlo Collision method.The environment finger shaped electrode...