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Preparation method of dielectric gradient material and potting method of electronic components

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

Active Publication Date: 2022-02-25
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Preparation method of dielectric gradient material and potting method of electronic components
  • Preparation method of dielectric gradient material and potting method of electronic components
  • Preparation method of dielectric gradient material and potting method of electronic components

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preparation example Construction

[0039] 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:

[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 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;

[0042] Step S3: canceling the magnetic field, applying an alternating electric field to ...

Embodiment

[0140] 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.

[0141] 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

A method for preparing a dielectric gradient material, comprising the following steps: mixing inorganic particles and liquid organic matter to obtain a suspension, wherein the inorganic particles include at least one magnetic material; applying a magnetic field to the suspension, under the action of the magnetic field Next, the magnetic field force that the first part of the inorganic particles are subjected to is greater than the viscous resistance that the first part of the inorganic particles are subjected to in the suspension, so that the first part of the inorganic particles are enriched along the direction of the magnetic field; cancel the magnetic field, and apply an alternating electric field to the applied magnetic field After the suspension, to generate an AC voltage in the suspension, under the action of the AC voltage, the electric field force received by the second part of the inorganic particles is greater than the viscous resistance received by the second part of the inorganic particles in the suspension, so that The second part of inorganic particles is arranged in a chain along the direction of the electric field; the suspension is solidified after the alternating electric field is applied, and the suspension is solidified to obtain a dielectric gradient material. The invention also 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 preparation method of a dielectric gradient material and a potting method of electronic components. 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 medi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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