A kind of carbon-based far-infrared radiation electric heating plate and preparation method thereof
A far-infrared radiation and electric heating plate technology, applied in the direction of electric heating devices, ohmic resistance heating, ohmic resistance heating parts, etc., can solve the problem of affecting the conductive heating and infrared radiation effects of electric heating materials, poor heat dissipation of polymer films, and affecting the stability of heating temperature Sex and other issues, to achieve good far-infrared radiation, good thermal insulation, high electrothermal conversion rate effect
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Embodiment 1
[0043] The carbon-based far-infrared radiation electric heating plate of the present invention mainly includes a substrate, and the thickness of the substrate is generally 5-30 mm. The substrate can be made into different shapes as required, such as rectangle, square, circle, ellipse, irregular shape, etc. There may or may not be a pattern on the substrate. The size of the substrate can be adjusted as needed. Positive and negative electrodes are arranged inside the substrate, and the positive and negative electrodes are located on the same plane perpendicular to the thickness, preferably at 1 / 2 thickness of the substrate, and wires are provided on the positive and negative electrodes. The outer layer of the substrate can be further wrapped with an insulating layer or / and a protective layer as an intermediate layer. For example, only the insulating layer can be wrapped on the outer layer of the substrate, or only the protective layer can be wrapped on the outer layer of the su...
Embodiment 2
[0048] The structure of the electric heating plate is the same as in Example 1. The substrate is made of a carbon-based far-infrared radiation electric heating composition. 50 parts of binder. The conductive fiber is graphite fiber, the composite ceramic powder is a mixture of corundum, quartz, titanium dioxide and limestone, and the binder is epoxy resin.
[0049] Its preparation method is as follows:
[0050] 1. Add corundum (100 micron) grinding media to the graphite fiber for ball milling, the ball milling speed is 200 rpm, and the time is 1 hour.
[0051] 2. Clean the graphite fibers after ball milling with distilled water for later use; add KH550 to distilled water to make a silane coupling agent solution with a concentration of 3vol.%, adjust the pH value of the solution to 4, add graphite fibers and graphene to the solution, After reacting at room temperature for 1 hour, centrifuge, and then vacuum-dry to obtain conductive fibers with graphene grafted on the surface,...
Embodiment 3
[0059] The structure of the electric heating plate is the same as in Example 1. The substrate is made of a carbon-based far-infrared radiation electric heating composition. 35 parts of binder. The conductive fiber is graphite fiber, the composite ceramic powder is a mixture of corundum, quartz, titanium dioxide and limestone, and the binder is phenolic resin.
[0060] Its preparation method is as follows:
[0061] 1. Add titanium dioxide (20 micron) grinding medium to the graphite fiber for ball milling, the ball milling speed is 200 rpm, and the time is 1 hour.
[0062] 2. Clean the graphite fibers after ball milling with distilled water for later use; add KH550 to distilled water to make a silane coupling agent solution with a concentration of 3vol.%, adjust the pH value of the solution to 6, add graphite fibers and graphene to the solution, React at room temperature for 1 hour, centrifuge, and vacuum dry to obtain conductive fibers with graphene grafted on the surface. Th...
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