scispace - formally typeset
Search or ask a question
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.


Papers
More filters
Journal ArticleDOI
TL;DR: In this paper, a silicone matrix with graphite powder of micrometric size in volume fractions around the electric percolation threshold was investigated with regard to their piezoresistance properties.
Abstract: Composites of a silicone matrix charged with graphite powder of micrometric size in volume fractions around the electric percolation threshold (25–35%) have been investigated with regard to their piezoresistance properties. The elastic modulus changes with graphite content, reaching a maximum at 30 vol.%. From measurements of electric resistivity, the percolation threshold was determined as 31 vol.% at a compressive strain of 2%. The threshold value was found to be dependent on the applied compressive strain so that an insulator in the unstrained condition may become a conductor when subjected to a small pressure. The property can be exploited for contact sensors. Further, the electric resistance of a composite, charged a little beyond the percolation threshold, is also strain dependent, according to an equation of the type R = R0exp(βɛ), where β was found to be about 51.5. This value of β corresponds to a very high electric sensitivity of the material to an applied strain and makes it a candidate for application as a logarithmic strain transducer. Owing to the visco-elastic behavior of the elastomer matrix, there is a retardation of the electric response on unloading of about 2 s. The electric response to an applied stress follows an exponential law on loading and undergoes a corresponding retardation on unloading.

49 citations

Journal ArticleDOI
TL;DR: In this article, an asperity plowing model is proposed to account for the sliding behavior of unimpregnated superconducting magnet windings, and a simple epoxy coating technique was successful in eliminating initial rapid slip events, thereby completely stabilizing the sliding behaviour of a conductor/insulator combination.

49 citations

Journal ArticleDOI
TL;DR: In this paper, single suspension insulator units of several types as well as multi-unit strings were studied in a large refrigerated chamber and rime ice of various densities was deposited on these insulators.
Abstract: Single suspension insulator units of several types as well as multi-unit strings were studied in a large refrigerated chamber. Rime ice of various densities was deposited on these insulators. The increase of leakage currents, the reduction of flashover voltages, and the alteration of voltage distributions along insulator strings caused by the presence of the ice were measured. The effects of various protective coatings on the insulator performance were examined. The process of insulator flashover under rime ice is compared with that under the usual types of industrial and marine pollution at temperatures above freezing point.

49 citations

Proceedings ArticleDOI
D.N. Light1, James R. Wilcox1
01 May 1994
TL;DR: In this paper, the significant electrical and mechanical properties of Teflon-based packaging materials, and the unique processing challenges encountered in the fabrication of teflon printed circuit boards and modules are discussed.
Abstract: Teflon-based dielectric materials provide desirable electrical and mechanical properties when used as insulator materials for printed wiring boards (PWB's). However, along with the significant performance and reliability advantages of these insulator materials for microwave and high speed digital applications, there are also significant processing challenges. This paper reviews the significant electrical and mechanical properties of Teflon-based packaging materials, and discusses the unique processing challenges encountered in the fabrication of Teflon printed circuit boards and modules. Key features of the IBM Microelectronics High Performance Carrier fabrication process are described as they relate to those challenges. >

48 citations

Patent
22 Jun 2001
TL;DR: In this article, a multilayer composite insulator is formed by applying differential heat and applied pressure to two opposing sides of the insulator precursor and applying pressure to the insulating precursor.
Abstract: A process for forming a multilayer composite insulator (10) includes the steps of forming an insulator precursor (24) by orienting an insulation insert (16) in a desired location between a first facing layer (12) and a polymer based blanket layer (14), applying differential heat to two opposing sides of the insulator precursor and applying pressure to the insulator precursor (28, 30). Together, the applied differential heat and applied pressure mold the insulator precursor to a desired shape while also providing the polymer based blanket material with a first relatively high density (32) adjacent a warmer of the two opposing sides and a zone of relatively low density (34) adjacent the cooler of the two opposing sides. The process also includes the cooling of a molded precursor to set the insulator in the desired shape.

48 citations


Network Information
Related Topics (5)
Voltage
296.3K papers, 1.7M citations
89% related
Dielectric
169.7K papers, 2.7M citations
86% related
Thin film
275.5K papers, 4.5M citations
82% related
Silicon
196K papers, 3M citations
80% related
Band gap
86.8K papers, 2.2M citations
80% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023368
2022892
2021224
2020478
2019561
2018629