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

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

Active Publication Date: 2021-06-11
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

[0040] see figure 1, a method for preparing a dielectric gradient material based on magnetic field induction provided by an embodiment of the present invention, comprising the following steps:

[0041] Step S1: mixing inorganic particles and liquid organic matter to obtain a suspension, the inorganic particles include at least one magnetic material with a dielectric constant greater than 40;

[0042] Step S2: applying a magnetic field to the suspension, under the action of the magnetic field, the magnetic field force on some of the inorganic particles is greater than the viscous resistance on the part of the inorganic particles in the suspension, so that The part of the inorganic particles is arranged in a chain along the direction of the magnetic field;

[0043] Step S3: performing solidification treatment on the suspension after applying the magnetic field to solidify the suspension to obtain the dielectric gradient material.

[0044] The inorganic particles are dispersed ...

Embodiment

[0120] Add the photosensitive bisphenol A type epoxy acrylate resin and the defoamer TL-X60 into the mixing tank according to the ratio of 100:0.4 in parts by mass to obtain the mixed solution, stir at a speed of 600r / min for 0.5h in an ultrasonic environment, and Degas in a vacuum environment at 50°C for 0.5h.

[0121] Add the mixture, barium titanate@ferric oxide core-shell particles with a particle size of 1 μm and KH-560 silane coupling agent into the mixing tank according to the ratio of 100:2.5:0.0375 in parts by mass, and in an 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 to obtain a suspension, wherein, converted into a volume fraction, barium titanate@ferric oxide accounts for 1% of the total volume of the suspension 0.5%.

[0122] see Figure 4 , put the suspension in a disc-shaped mold, the disc-shaped mold is made of polytetrafluoroethylene material, the surface is coated with Jia...

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Abstract

A method for preparing a dielectric gradient material, comprising the steps of: mixing inorganic particles and liquid organic matter to obtain a suspension, wherein the inorganic particles at least contain a magnetic material with a dielectric constant greater than 40; A magnetic field is applied, and under the action of the magnetic field, the magnetic field force received by some of the inorganic particles is greater than the viscous resistance received by the part of the inorganic particles in the suspension, so that the part of the inorganic particles is in the direction of the magnetic field. chain arrangement; and solidifying the suspension after applying the magnetic field to solidify the suspension to obtain the dielectric gradient material. The invention also provides a potting method for electronic components. In the preparation method provided by the invention, by applying a magnetic field to the suspension liquid in situ, the inorganic particles in the suspension liquid are arranged in chains along the direction of the magnetic field, and the preparation method is simple, controllable and cost-saving.

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): B29C39/10B29C39/22B29K105/20
CPCB29C39/10B29C39/22B29C2791/004B29K2105/203
Inventor 申子魁贾志东王希林张天枫
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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