Liquid dielectric

About: Liquid dielectric is a research topic. Over the lifetime, 3702 publications have been published within this topic receiving 45150 citations.

Flexible capacitive sensor encapsulating liquids as dielectric with a largely deformable polymer membrane

Abstract: Flexible and highly-sensitive capacitive sensors that are capable of detecting pressure distribution on curved surfaces are now in demand Using solid dielectric material could limit the sensors flexibility, while using air as the dielectric might compromise the sensors sensitivity Proposed is a distributed capacitive sensor that contains highly dielectric liquid, which increases the sensor sensitivity while maintaining their flexibility Since the liquid used in this work is incompressible, an escape reservoir is used that allows the liquid between the electrodes to flow into the reservoir when external pressure is applied and the gap between the electrode decreases In prior work, the escape reservoir was designed to be alongside the sensing area, which resulted in a large footprint A sensor has been designed that contains encapsulated highly dielectric liquid and allows the liquid to escape beneath the sensing area The footprint was successfully reduced by 75% The encapsulated liquid enhanced the maximum measurable pressure from 100 kPa to 800 kPa The amplification ratios of the sensitivity with DI water and glycerine increased 7 and 35 times respectively, as compared to the device without the liquid encapsulated

Electromechanical and electro-optical properties of nanowires

Abstract: In an external (static of high-frequency) electric field, image forces cause a torque moment to act on semiconducting or metallic nanowires. As a result, a system of nanowires which are suspended in a dielectric liquid acquire characteristics, typical of those of nematic liquid crystals, such as field-induced optical anisotropy. For freestanding nanowires prepared on a substrate, an applied electric field is shown to be capable of causing nanowire bending, which can potentially provide a means of nanoactuation. The bending of such nanowires in a high-frequency electric field is comprised of a superposition of static bending and induced mechanical oscillations, whose amplitude depends on the resonant mechanical vibration characteristics of the nanowires.

Breakdown and prebreakdown phenomena in liquids under positive impulse voltages

Abstract: We examine the breakdown and prebreakdown behavior of two insulating liquids: benzyl-toluene and mineral oil in a nonuniform electric field at large distances (up to 20 cm) under a positive impulse voltage. We evaluate and compare the breakdown strengths of both liquids in these conditions as a function of interelectrode distance via Weibull type plots, a method commonly used when dealing with insulating gases and solids. The comparative behaviors of the liquids change greatly when the cumulative probability of breakdown is decreased from 100%. The second part of this study concerns streamer stopping lengths and the corresponding current and light emission signals. >