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Dielectric gradient material and application thereof

A gradient material and dielectric technology, applied in circuits, electrical components, electrical solid devices, etc., can solve the problems of limited influence of dielectric constant of 3D insulators, inability to provide large gradient dielectric distribution, limited improvement of dielectric constant, etc.

Active Publication Date: 2019-08-30
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology achieves 2D dielectric distribution, which has limited influence on the dielectric constant of 3D insulators, and its application prospects are still limited.
[0005] The effectiveness of using dielectric gradient materials to homogenize the electric field and improve insulation performance has been verified by many research institutes. , the dielectric constant obtained by this method is limited, and it cannot provide the large gradient dielectric distribution required by the extremely inhomogeneous electric field

Method used

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  • Dielectric gradient material and application thereof
  • Dielectric gradient material and application thereof
  • Dielectric gradient material and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0030] see figure 1 , a method for preparing a dielectric gradient material based on the synergistic induction of a magnetic field and an electric field provided by an embodiment of the present invention includes the following steps:

[0031] Step S1: mixing inorganic particles and liquid organic matter to obtain a suspension, the inorganic particles include at least one magnetic material, and the inorganic particles include a first part of inorganic particles and a second part of inorganic particles;

[0032] Step S2: applying a magnetic field to the suspension, under the action of the magnetic field, the magnetic field force experienced by the first part of inorganic particles is greater than the viscous resistance experienced by the first part of inorganic particles in the suspension, so that the first part of inorganic particles is enriched along the direction of the magnetic field;

[0033] Step S3: canceling the magnetic field, applying an alternating electric field to ...

Embodiment

[0130] Take photosensitive bisphenol A type epoxy acrylate resin as liquid organic matter, add it to a mixing tank, add epoxy resin TL-X60 as defoamer, wherein the mass ratio of liquid organic matter and defoamer is 100:0.4, in ultrasonic environment Stirring at a speed of 600 rpm for 0.5 hours, and degassing in a vacuum environment at 50°C for 0.5 hours. Add BaTiO with a particle size of 1 μm core-shell structure to the above mixture 3 @Fe 3 o 4 As inorganic particles, and adding KH-560 silane coupling agent, the mass ratio of the mixture, inorganic particles and coupling agent is 100:0.5:0.0075, stirred at a speed of 600 rpm in an ultrasonic environment for 0.5 hours, and Degas in a vacuum environment at 50°C for 0.5 hour to obtain a homogeneous suspension.

[0131] see Figure 4 , pour the suspension into a disc-shaped mold, the mold is made of polytetrafluoroethylene material, the surface of the mold is coated with Jiadan as a release agent, and the center of the tube ...

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Abstract

The invention discloses a dielectric gradient material. The dielectric gradient material comprises basis material and filler particles, wherein the filler particles are scattered in the basis material, and comprise inorganic particles; the inorganic particles at least comprise one kind of magnetic material; the dielectric gradient material comprises a first region, a second region and a third region located between the first region and the second region; the filler particles located in the first region comprise first part inorganic particles and second part inorganic particles; the first partinorganic particles are in enrichment state; the second part inorganic particles are arranged in chain shape in the first region; the filler particles in the second region are in chaotic distribution.The invention further provides an application of the dielectric gradient material. According to the dielectric gradient material provided by the invention, dielectric constants and filling density are both in graded distribution, and besides, part of filler particles are arranged in chain shape.

Description

technical field [0001] The invention relates to the technical field of insulating materials, in particular to a dielectric gradient material and its application. Background technique [0002] With the development of power systems towards EHV / UHV and large-capacity transmission, and the development of high-tech equipment such as pulse power, high-power microwave, and high-power semiconductor devices towards high voltage and miniaturization, the requirements for electrical insulation performance are becoming increasingly stringent , During the operation of the equipment, the problems caused by the failure of the insulation system, especially the solid insulation, are becoming more and more prominent. It is generally believed that the high non-uniformity of the electric field (local electric field distortion) is the root cause of insulation breakdown and flashover along the surface. At the interface of different media, such as the three junctions of electrodes, insulation and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/10C08K13/06C08K9/06C08K9/10C08K3/22C08K3/26C09D163/10C09D5/25H01L23/29H01L21/56
CPCC08K13/06C08K9/06C08K9/10C08K3/22C08K3/26C09D163/10H01B3/308H01L23/295H01L21/56C08K2201/003C08K2003/2241C08K2003/265C08L2203/206C08L63/10
Inventor 申子魁贾志东王希林张天枫
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV