Heat-conducting ultrahigh-voltage-resistant insulating composite material and preparation method thereof

Abstract

The invention relates to a heat-conducting ultrahigh-voltage-resistant insulating composite material and a preparation method thereof. The method comprises the following steps: carrying out ball milling on heat-conducting insulating ceramic powder and a solvent to obtain a heat-conducting insulating ceramic dispersion liquid; uniformly mixing the heat-conducting insulating ceramic dispersion liquid with matrix resin to obtain a mixture; carrying out reduced pressure distillation on the mixture to obtain heat-conducting insulating ceramic modified matrix resin; preparing a chopped fiber prepreg from chopped fibers and heat-conducting insulating ceramic modified matrix resin; preparing a continuous fiber prepreg sheet from continuous fiber cloth and heat-conducting insulating ceramic modified matrix resin; the continuous fiber prepreg sheets and the chopped fiber prepreg are alternately laid until the preset thickness is reached, and alternately laid prepreg is obtained; and carrying out mold pressing curing on the alternately-laid prepreg to obtain the heat-conducting ultrahigh-voltage-resistant insulating composite material. The heat-conducting ultrahigh-voltage-resistant insulating composite material obtained by the invention has high mechanical property and excellent heat conduction capability, and has better voltage resistance compared with a traditional laminated board.

Description

technical field [0001] The invention belongs to the technical field of fiber-reinforced insulating composite materials, and particularly relates to a thermally conductive type ultra-high voltage-resistant insulating composite material and a preparation method thereof. Background technique [0002] UHV transmission projects are the backbone grids for clean energy transmission, and fiber-reinforced insulating composite materials are key insulating materials for UHV electrical equipment, which are crucial to the safe and stable operation of power grid projects. As an insulating structural member, fiber reinforced insulating composite material not only needs to have good mechanical properties, but also has higher requirements for withstand voltage performance. At the same time, the material requires certain insulation and thermal conductivity to prevent heat from accumulating inside the material, causing potential safety hazards. . In the packaging of high-power power electroni...

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Problems solved by technology

[0003] In order to improve the thermal conductivity of the insulating composite material, thermally conductive fillers can be added to the insulating composite material, but this will significantly reduce the high-voltage resistance of the material. For the insulating composite material, both high thermal conductivity and the ability to withstand ultra-high The performance of the voltage is an urgent problem to be solved in the manufacturing process

At present, there is no relevant report on the preparation of thermally conductive ultra-high voltage resistant insulating composite materials with high thermal conductivity and ultra-high voltage resistance.

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