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Dielectric Gradient Materials and Their Applications
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A gradient material and dielectric technology, applied in the direction of circuits, electrical components, electric solid devices, etc., can solve the problem of inability to provide extremely uneven electric field and large gradient dielectric distribution, limited improvement of relative permittivity, and relative permittivity of 3D insulators Issues such as limited impact
Active Publication Date: 2022-02-25
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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Problems solved by technology
However, this technology achieves 2D dielectric distribution, which has limited influence on the relative permittivity 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 relative permittivity obtained by this method is limited, and it cannot provide the large gradient dielectric distribution required by the extremely inhomogeneous electric field
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preparation example Construction
[0031] See figure 1 For the embodiment of the present invention, a method of preparing a dielectric gradient material based on magnetic field and electric field synergistic, including the following steps:
[0032] Step S1: Mix the inorganic particles and liquid organic matter to obtain a suspension, the inorganic particles comprise at least a magnetic material, the inorganic particles comprising a first inorganic particle and a second portion of inorganic particles;
[0033] Step S2: Apply a magnetic field to the suspension, under the action of the magnetic field, the magnetic field force of the first portion of the inorganic particles is larger than the viscous resistance of the first portion inorganic particles in the suspension, To enable the first part inorganic particles in the direction of the magnetic field;
[0034] Step S3: Undo the magnetic field, an alternating electric field is applied to the suspension after the revocation of the magnetic field, to generate an alterna...
Embodiment
[0131] As the liquid organic substance, a mixing tank is added as a liquid organic substance, and an epoxy resin TL-X60 is added as an antifoaming agent, wherein the mass ratio of liquid organic matter and defoamer is 100: 0.4, in an ultrasound environment The mixture was stirred at a rate of 600 rpm and at a rate of 0.5 hours, and 0.5 hours were degassed in a vacuum environment at 50 ° C. To the mixture of the mixture is added to a Batio having a particle size of 1 μm 3 @Fe 3 O 4 As the inorganic particles, the mass ratio of the KH-560 silane coupling agent, the mixture, the inorganic particles, and the coupling agent is 100: 0.5: 0.0075, and the mixture is stirred at 600 rp / min at a rate of 600 rp / min in the ultrasound environment, and Deasional 0.5 hours in a vacuum environment of 50 ° C, resulting in a uniform hochamps.
[0132] See Figure 4 In a circular disk mold, the mold is prepared from the polytetrafluoride material, and the surface of the mold is coated as a release...
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Abstract
A dielectric gradient material, the dielectric gradient material includes a matrix material and filler particles, the filler particles are dispersed in the matrix material, the filler particles include inorganic particles, and the inorganic particles include at least one magnetic material The dielectric gradient material includes a first area, a second area, and a third area between the first area and the second area, and the filler particles in the first area include a first part of inorganic particles and The second part of inorganic particles, the first part of inorganic particles is in an enriched state, the second part of inorganic particles is arranged in chains in the first region, and the filler particles are distributed randomly in the second region . The invention also provides an application of the dielectric gradient material. The dielectric gradient material provided by the invention has a gradient distribution of relative permittivity and filler density, and at the same time, some filler particles are arranged in chains.
Description
Technical field [0001] The present invention relates to the field of insulating materials, and more particularly to a dielectric gradient material and its application thereof. Background technique [0002] With the development of the power system to the super / special high voltage, the large-capacity transmission direction, and the high-tech equipment such as pulse power, high power microwave, high-power semiconductor device to high voltage, small-scale direction, the requirements for electrical insulation performance is becoming more and more severe. Due to the problems caused by insulation systems, especially solid insulation failures during operation, it is also increasingly prominent. It is generally believed that the unevenness of the electric field is high (local electric field distortion) is the root cause of the insulation breakdown, along the surface of the flash. At different media, such as electrodes, insulation and gas triparticles, due to sharp changes in dielectric...
Claims
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