High-thermal-conductivity composite magnetism isolating sheet for wireless charging receiving end and preparation method thereof
A wireless charging and receiving end technology, applied in the manufacture of inductors/transformers/magnets, transformer/inductor cores, preventing/reducing unwanted electric/magnetic effects, etc., can solve the problem of affecting the efficiency and safety of wireless charging power transmission , Reliability is difficult to guarantee, and problems such as magnetic concentration and magnetic conduction cannot be achieved, so as to achieve the effect of benefiting wireless charging efficiency, avoiding the decline of power transmission efficiency, and high magnetic permeability
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Embodiment 1
[0045] The composition of nanocrystalline flakes is 1K107B, that is, Fe 73.5 Si 13.5 B 9 Nb 3 Cu 1 (percentage by weight), the thickness of the flakes is 20 μm, and the number of layers of nanocrystalline flakes is 4;
[0046] The composite material layer is composed of thermally conductive filler, magnetically conductive filler and adhesive.
[0047] The thermally conductive filler is a composite filler of aluminum nitride and boron nitride, and the average particle size of the powder is 31nm and 69nm respectively.
[0048] The magnetically conductive filler is Fe 85 Si 9.6 Al 5.4 , the dimension in the thickness direction is 0.95 μm, and the aspect ratio is 103.
[0049] The binder is polyurethane.
[0050] The number of composite material layers is 3, and the thickness of the composite material layer is 10 μm. The weight percentages of thermally conductive fillers, magnetically conductive fillers, and binders are as follows:
[0051] Thermally conductive filler: ...
Embodiment 2
[0066] The composition of nanocrystalline flakes is 1K107B, that is, Fe 73.5 Si 13.5 B 9 Nb 3 Cu 1 (percentage by weight), the thickness of the flakes is 18 μm, and the number of layers of nanocrystalline flakes is 4;
[0067] The composite material layer is composed of thermally conductive filler, magnetically conductive filler and adhesive.
[0068] The thermally conductive filler is a composite filler of boron nitride and aluminum oxide, and the average particle size of the powder is 31nm and 80nm respectively.
[0069] The magnetically conductive filler is Fe 50 Ni 50 , the dimension in the thickness direction is 1.12 μm, and the aspect ratio is 110.
[0070] The binder is polyurethane.
[0071] The number of composite material layers is 3, and the thickness of the composite material layer is 8 μm. The weight percentages of thermally conductive fillers, magnetically conductive fillers, and binders are as follows:
[0072] Thermally conductive filler: 40%;
[007...
Embodiment 3
[0087] The composition of nanocrystalline flakes is 1K107B, that is, Fe 73.5 Si 13.5 B 9 Nb 3 Cu 1 (percentage by weight), the thickness of the flakes is 25 μm, and the number of layers of nanocrystalline flakes is 3;
[0088] The composite material layer is composed of thermally conductive filler, magnetically conductive filler and adhesive.
[0089] The thermally conductive filler is a composite filler of aluminum nitride and aluminum oxide, and the average particle size of the powder is 80nm and 30nm respectively.
[0090] The magnetically conductive filler is Fe 50 Ni 50 , the dimension in the thickness direction is 0.8 μm, and the aspect ratio is 95.
[0091] The binder is polyurethane.
[0092] The number of composite material layers is 2, and the thickness of the composite material layer is 15 μm. The weight percentages of thermally conductive fillers, magnetically conductive fillers, and binders are as follows:
[0093] Thermally conductive filler: 15%;
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