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Dielectric gradient material preparation method and potting method for electronic components

A technology for electronic components and gradient materials, applied in the field of insulating material preparation, can solve the problems of inability to provide, uneven large gradient dielectric distribution, limited increase in dielectric constant, etc., and achieve the effect of improving utilization.

Active Publication Date: 2019-09-03
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, it is necessary to provide a preparation method of a dielectric gradient material to solve the above problems that the obtained dielectric constant is limited and cannot provide the large gradient dielectric distribution required by the extremely inhomogeneous electric field

Method used

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  • Dielectric gradient material preparation method and potting method for electronic components
  • Dielectric gradient material preparation method and potting method for electronic components
  • Dielectric gradient material preparation method and potting method for electronic components

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preparation example Construction

[0039] See figure 1 , Is a method for preparing a dielectric gradient material based on the synergistic induction of a magnetic field and an electric field according to an embodiment of the present invention, including the following steps:

[0040] 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;

[0041] Step S2: applying a magnetic field to the suspension, under the action of the magnetic field, the magnetic field force received by the first part of the inorganic particles is greater than the viscous resistance of the first part of the inorganic particles in the suspension, So as to enrich the first part of inorganic particles in the direction of the magnetic field;

[0042] Step S3: The magnetic field is cancelled, and an alternating electric field is applied to the sus...

Embodiment

[0140] Use photosensitive bisphenol A epoxy acrylate resin as liquid organic matter, add it to a mixing tank, add epoxy resin TL-X60 as defoamer, where the mass ratio of liquid organic matter to defoamer is 100:0.4, in an ultrasonic environment The medium was stirred at 600 rpm for 0.5 hour, and degassed in a vacuum environment at 50°C for 0.5 hour. Add 1μm core-shell structure BaTiO to the above mixture 3 @Fe 3 O 4 As inorganic particles, KH-560 silane coupling agent was added. The mass ratio of the mixture, inorganic particles and coupling agent was 100:0.5:0.0075, and stirred at 600 rpm for 0.5 hours in an ultrasonic environment, and Degas in a vacuum environment at 50°C for 0.5 hours to obtain a uniform suspension.

[0141] See Figure 4 , Pouring 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 is coaxially penetrating a tube with a radius of 5mm The...

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Abstract

The invention relates to a dielectric gradient material preparation method, which comprises: mixing inorganic particles and a liquid-state organic matter to obtain a suspension, wherein the inorganicparticles at least comprise a magnetic material; applying a magnetic field to the suspension, wherein the magnetic field force on the first part of the inorganic particles is higher than the viscous resistance of the first part of the inorganic particles in the suspension under the action of the magnetic field, such that the first part of the inorganic particles are enriched along the magnetic field direction; removing the magnetic field, and applying an alternating electric field on the suspension applied with the magnetic field so as to generate an alternating voltage in the suspension, wherein the electric field force on the second part of the inorganic particles is higher than the viscous resistance of the second part of the inorganic particles in the suspension under the action of thealternating voltage, such that the second part of the inorganic particles are arranged in a chain shape along the electric field direction; and solidifying the suspension applied with the alternatingelectric field to solidify the suspension so as to obtain the dielectric gradient material. The invention further provides a potting method for electronic components.

Description

Technical field [0001] The invention relates to the technical field of insulating material preparation, in particular to a method for preparing dielectric gradient materials and a potting method for electronic components. Background technique [0002] With the development of power systems towards ultra-high voltage and large-capacity transmission, and the development of high-voltage and miniaturization of high-tech equipment such as pulsed power, high-power microwaves, and high-power semiconductor devices, the requirements for electrical insulation performance are becoming more stringent. , The problems caused by the insulation system, especially the solid insulation failure during the operation of the equipment have become increasingly prominent. It is generally believed that the high unevenness 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...

Claims

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Application Information

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IPC IPC(8): C08J3/28C08L63/10C08L63/00C08K3/24C08K3/22C08K5/5435
CPCC08J3/28C08J2363/10C08J2463/00C08K3/24C08K2003/2275C08K5/5435
Inventor 申子魁贾志东王希林张天枫
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV