scispace - formally typeset
Search or ask a question
Topic

Liquid dielectric

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


Papers
More filters
Proceedings ArticleDOI
10 Dec 2002
TL;DR: In this paper, the influence of additives and hydrostatic pressure on the initiation phase of streamers and the dielectric strength of liquids, in a point-plane electrode arrangement under dc voltages, was investigated.
Abstract: This paper is aimed at the influence of additives and hydrostatic pressure on the initiation phase of streamers and the dielectric strength of liquids, in a point-plane electrode arrangement under dc voltages. We show that the increase of hydrostatic pressure and/or the addition of a certain concentration of an electronic scavenger compound as Iodobenzene or Carbon Tetrachloride increases the initiation voltage of streamers in liquids such as cyclohexane, silicon oil or tetra-ester. This results in an increase of the dielectric strength of these liquids. The fact that the streamer is accelerated in presence of such additives does not lead necessarily to the reduction of the dielectric strength of liquid.

16 citations

Journal ArticleDOI
TL;DR: In this paper, the authors investigated the effect of steady and non-uniform time-periodic electric fields on the transfer of heat and mass in the presence of a spherical drop of a dielectric fluid.

16 citations

Patent
07 Dec 1992
TL;DR: In this paper, the authors describe a method for fabricating a dielectric layer in a high density multichip module, where the substrate is cleaned to remove contaminants, heated to remove moisture, curtain coated with a single coating of a viscous heat curable liquid dielectrics such as polyimide, and heated to cure the dielectrically by increasing the temperature at most 15° C per minute to a predetermined cure temperature not exceeding 450° C.
Abstract: A porous substrate curtain coated with a single coating of a liquid dielectric that is cured into a well adhering film at least 15 microns thick with a uniformity of less than 5 microns. The substrate is cleaned to remove contaminants, heated to remove moisture, curtain coated with a single coating of a viscous heat curable liquid dielectric such as polyimide, and heated to cure the dielectric by increasing the temperature at most 15° C. per minute to a predetermined cure temperature not exceeding 450° C. The invention is well suited for fabricating a dielectric layer in a high density multichip module.

16 citations

Proceedings ArticleDOI
19 Jul 1993
TL;DR: In this paper, a cellular automation with an anisotropic structure factor is used instead of electric-field calculation, which makes it possible to simulate some additional effects, such as weak charge relaxation along the conducting branches.
Abstract: A fluctuation model of liquid dielectric breakdown which describes the breakdown from the anode through the ionization mechanism is discussed. In the first approximation, a cellular automation with an anisotropic structure factor is used instead of electric-field calculation. The reason for this approximation is the weak charge relaxation along the conducting branches. Thus, the field increase at conducting tips is not significant. This simple model make it possible to explain basic statistical effects observed in experiments. Furthermore, a more exact model is considered, which takes into account the charge relaxation. This makes it possible to simulate some additional effects. The physical nature of the main growth condition in the fluctuation model is discussed.

16 citations

Li Yong1
01 Jan 2007
TL;DR: In this article, the authors used inverse power and exponential model to fit test data and calculate voltage endurance coefficients for evaluating the lifetime of vegetable oil-paper model, the step-stress test is used in accelerated electrical stress aging test, and two parameter Weibull distribution is used to statistic analysis for the mean lifetime.
Abstract: As a new environmental friendly dielectric liquid,vegetable insulating oil has high fire point and flash point,almost fully biodegradable,excellent electric properties.Oil-paper structures are broadly used in electrical equipments because of its steady characteristics.For evaluating the lifetime of vegetable oil-paper model,the step-stress test is used in accelerated electrical stress aging test,and two parameter Weibull distribution is used to statistic analysis for the mean lifetime.This paper uses inverse power and exponential model to fit test data and calculate voltage endurance coefficients.As a contrast sample,the accelerated electrical stress aging test is also used to mineral oil-paper model.It is indicated that the relative permitivity of vegetable insulating oil is higher than that of mineral oil,so the electric field distribution in vegetable oil-paper insulation is more uniform than that in mineral oil-paper insulation.Therefore,the electrical aging behavior of vegetable oil-paper insulation is better than mineral oil-paper insulation.

16 citations


Network Information
Related Topics (5)
Voltage
296.3K papers, 1.7M citations
81% related
Capacitor
166.6K papers, 1.4M citations
78% related
Dielectric
169.7K papers, 2.7M citations
77% related
Electric field
87.1K papers, 1.4M citations
77% related
Cathode
112K papers, 1.5M citations
75% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202328
202267
202191
2020122
2019142
2018120