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High-temperature heating film and preparation method thereof

A technology of heating film and high temperature, applied in the direction of heating element materials, etc., can solve the problem of low working temperature of heating film, and achieve the effect of fast heat conduction, rapid temperature rise and high heating temperature

Inactive Publication Date: 2019-06-14
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing heating film sacrifices its thermal conductivity when solving the insulation problem of the heating film, coupled with the limitation of the high temperature resistance of the heating film material itself, resulting in a lower working temperature of the heating film

Method used

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  • High-temperature heating film and preparation method thereof
  • High-temperature heating film and preparation method thereof
  • High-temperature heating film and preparation method thereof

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preparation example Construction

[0031] A method for preparing a high-temperature heating film of the present invention comprises the following steps:

[0032] S1, attaching a reflective layer on the insulating substrate;

[0033] The insulating substrate is a porous material, including one or more combinations of glass fiber cloth, glass, glass ceramics, ultrafine glass wool, high silica wool, and airgel felt.

[0034] The reflective layer is heat reflective material, including gold, silver, copper, nickel, aluminum foil or metal-plated polyester or polyimide film.

[0035] S2, compounding the carbon raw material and boron nitride in proportion to obtain a carbon-boron nitride composite material;

[0036] The carbon raw material is one or more combinations of graphite microcrystals, carbon crystals, graphene, conductive carbon, porous carbon, hollow carbon spheres, carbon nanotubes, and carbon fibers.

[0037] After the carbon raw material is compounded with the boron nitride, the mass proportion of the ca...

Embodiment 1

[0046] 1. Select glass-ceramics as the substrate, silver-plated polyimide as the reflective layer, and coat a layer of polyimide film on the glass-ceramics;

[0047] 2. Graphene and boron nitride are evenly compounded in a mass ratio of 4:1, and mechanically mixed to obtain a graphene-boron nitride composite material;

[0048] 3. Coat the graphene-boron nitride composite material on the polyimide film in step 1 as the heating layer, and weld metal copper wires on both sides of the heating layer as the positive and negative electrodes;

[0049] 4. Cover the heat-generating layer with an insulating and heat-conducting layer to prepare a composite high-temperature heating film.

[0050] The positive and negative poles were connected to 220V voltage, and the power was turned on for 30 seconds. The surface temperature of the film was measured to be 100°C by an infrared temperature tester.

Embodiment 2

[0052] 1. Select glass-ceramics as the substrate, silver-plated polyimide as the reflective layer, and coat a layer of polyimide film on the glass-ceramics;

[0053] 2. Graphene and boron nitride are stacked and compounded at a mass ratio of 1:1, wherein the bottom layer is a graphene layer and the top layer is a boron nitride layer to obtain a graphene-boron nitride composite material;

[0054] 3. Coat the graphene-boron nitride composite material on the polyimide film in step 1 as the heating layer, and weld metal copper wires on both sides of the heating layer as the positive and negative electrodes;

[0055] 4. Cover the heat-generating layer with an insulating and heat-conducting layer to prepare a composite high-temperature heating film.

[0056]The positive and negative poles were connected to 220V voltage, and the power was turned on for 30 seconds. The surface temperature of the film was measured to be 500°C by an infrared temperature tester.

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Abstract

The invention discloses a high-temperature heating film and a preparation method thereof. The high-temperature heating film sequentially comprises an insulation base, a heat reflection layer, a heating layer and an insulation heat conduction layer from bottom to top; and the heating layer is made of a carbon-boron nitride composite material. The preparation method comprises the steps of: attachingthe reflection layer to the insulation base; then compounding a carbon raw material with boron nitride to prepare the carbon-boron nitride composite material; then coating the carbon-boron nitride composite material on the reflection layer; and finally, covering the insulation heat conduction layer to prepare the high-temperature heating film. The heating film disclosed by the invention has the advantages of high electric heat conversion rate, high heating temperature, wide application range, safety and environmental protection.

Description

technical field [0001] The invention belongs to the technical field of heating films, and in particular relates to a high-temperature heating film and a preparation method thereof. Background technique [0002] The heating film is a heating device that converts electrical energy into heat energy. Driven by the national energy saving and environmental protection policies, the application prospect of heating film is broad, which can generate huge economic benefits, and improving the performance of heating film products is an urgent problem to be solved in the promotion of heating film. The main factors that determine the performance of heating film products are the heating material and product structure of the heating film, among which the heating material plays a decisive role. Heating materials are divided into metal resistance electric heating materials (such as metal wire, etc.) and non-metallic resistance electric heating materials (such as carbon fiber, printing ink, et...

Claims

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Application Information

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IPC IPC(8): H05B3/12
Inventor 韩晓刚蒋扬昶孙周婷张凡王琦沈飞赵斌
Owner XI AN JIAOTONG UNIV
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