Topic
Insulator (electricity)
About: Insulator (electricity) is a research topic. Over the lifetime, 15941 publications have been published within this topic receiving 108950 citations. The topic is also known as: electrical insulator.
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TL;DR: In this article, the physics of injecting contacts on insulating solids is studied in detail for the case of discrete and distributed deep traps, and it is shown that a shallow trap may be converted to a deep trap and vice versa when electrodes are applied to the insulator depending on the relative magnitudes of the insulators parameters and electrode work function.
55 citations
TL;DR: In this article, the authors studied the charge transportation in poly(3-butylthiophene) (P3BT)/insulating polymer composites both microscopically and macroscopically.
Abstract: The charge transportation in poly(3-butylthiophene) (P3BT)/insulating polymer composites is studied both microscopically and macroscopically. The increased mobility of free charge carriers, in particular hole mobility, contributes to the enhanced electrical conductivity of this semiconductor/insulator composite. The conductivity origin of the composite, as revealed by conductive-atomic force microscopy (C-AFM), comes mainly from the P3BT network, whose carrier mobility has been improved as a result of reduced activation energy for charge transportation upon forming an interface with the insulating matrix. Both the huge interfacial area and interconnected conductive component are morphologically required for the enhanced electrical property of the composite. An increased size of the P3BT domains, which correspondingly reduces the interfacial area between the two components, ruins the enhancement. This study clarifies the mechanism of the higher electrical properties achieved in a semiconducting polymer upon blending with an insulating polymer, which will further promote the development of these low-cost, easily processable, and environmentally stable composites.
55 citations
TL;DR: In this paper, a simple holographic model of an insulator is presented, where both low temperature DC conductivity and the optical conductivity at zero temperature satisfy power laws with the same exponent, given by the scaling dimension of an operator in the IR.
Abstract: We present a simple holographic model of an insulator. Unlike most previous holographic insulators, the zero temperature infrared geometry is completely nonsingular. Both the low temperature DC conductivity and the optical conductivity at zero temperature satisfy power laws with the same exponent, given by the scaling dimension of an operator in the IR. Changing a parameter in the model converts it from an insulator to a conductor with a standard Drude peak.
55 citations
Patent•
17 Jan 2008
TL;DR: A multilayered circuit board with a single-side laminated structure has been proposed in this article, which does not include a core substrate having via-holes formed therethrough and vias for providing electrical connection through the via holes.
Abstract: A multilayered circuit board of the present invention has a single-side laminated structure and does not include a core substrate having via-holes formed therethrough and vias for providing electrical connection through the via-holes. The multilayered circuit board includes a plurality of pairs of layers, each pair including a conductor circuit layer and an insulator layer, wherein a glass transition temperature of each insulator layer is 170° C. or higher, a coefficient of thermal expansion at the glass transition temperature or lower of each insulator layer is 35 ppm or less, and a modulus of elasticity of each insulator layer is 5 GPa or more.
55 citations
TL;DR: In this paper, a gas model is developed, taking into account the generation, recombination and motion of charge carriers in SF6 of DC-GIL, and the surface charge density and the electric field distribution on the insulator surface under DC voltage were simulated.
Abstract: The problem of surface charge accumulation on gas-insulator interface is one of the critical factors for the development of DC Gas Insulated transmission Lines (GIL). In order to solve this problem, researchers have proposed a variety of mathematical models in which the volume conductivity of SF6 was assumed to be constant for calculating the distribution of surface charge. However, the conductivity of SF6 was inconstant, affected by electric field strength. In this paper, a gas model is developed, taking into account the generation, recombination and motion of charge carriers in SF6 of DC-GIL. The surface charge density and the electric field distribution on the insulator surface under DC voltage were simulated. Afterwards, the electric conduction through the volume of the insulator was proved to be the dominating accumulation mechanism. In order to improve the insulation performance, the influence of practical insulator shape on the electric field distribution in DC-GIL was studied. Three different shapes of insulator which were disc insulator, conical insulator and obtuse conical insulator were introduced and compared. The simulation results indicate the obtuse conical insulator was the most suitable configuration for DC-GIL.
55 citations