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Nanocrystalline flexible sheet and preparation method and application thereof

A nano-chip and crystal-flexible technology, applied in the field of nano-crystalline flexible sheet and its preparation, can solve the problem that the charging efficiency of MnZn ferrite and NiZn ferrite is not ideal, cannot have high saturation magnetic induction at the same time, and cannot meet the requirements of use. To achieve the effect of promoting Fe enrichment and nucleation, improving the uniformity of the microstructure, and increasing the ability to form amorphous

Pending Publication Date: 2022-01-21
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2
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  • Claims
  • Application Information

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Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the unsatisfactory charging efficiency of MnZn ferrite and NiZn ferrite used as wireless charging materials in the prior art, and the large size of the iron core, which cannot meet the requirements of future power electronic equipment. And can not simultaneously have defects such as high saturation magnetic induction intensity, thus providing a nanocrystalline flexible sheet and its preparation method and application

Method used

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  • Nanocrystalline flexible sheet and preparation method and application thereof
  • Nanocrystalline flexible sheet and preparation method and application thereof
  • Nanocrystalline flexible sheet and preparation method and application thereof

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[0054] The present invention also provides a method for preparing a nanocrystalline flexible sheet. In some embodiments, the temperature of the relaxation treatment is 280-380°C, which can be any value in the middle, such as 300°C, 320°C, 350°C , 360°C, etc., the present invention is not limited to this, further, when the relaxation treatment temperature is preferably 300-350°C, the performance of the obtained nanocrystalline flexible sheet is better, and the relaxation treatment temperature is between 300-350°C Any value between, for example, 310°C, 325°C, 335°C, 345°C, etc., which is not limited in the present invention.

[0055] In some embodiments, the relaxation treatment is carried out at a magnetic field strength of 10-800mT. When the magnetic field strength is 500-800mT, the performance of the obtained nanocrystalline flexible sheet is better, and the magnetic field strength is between 500-800mT. Any value, such as 550mT, 600mT, 650mT, 700mT, 750mT, etc., is not limite...

Embodiment 1

[0058] This embodiment provides a nanocrystalline flexible sheet whose components include Fe, Cu, Si, B, Nb, Mo and Y, and the atomic percentages are 76.1at%, 0.9at%, 13.5at%, 7.5at% respectively %, 1.2at%, 0.6at% and 0.2at%, that is, the molecular formula is Fe 76.1 Cu 0.9 Si 13.5 B 7.5 Nb 1.2 Mo 0.6 Y 0.2 .

[0059] The preparation method of the above-mentioned nanocrystalline flexible sheet comprises the following steps:

[0060] (1) Mix iron raw materials, copper raw materials, silicon raw materials, ferroboron alloy ingot raw materials, molybdenum-iron alloy ingot raw materials and yttrium raw materials according to the above percentages, cool at 1320°C for 45 minutes to obtain alloy ingots; then heat the alloy ingots to After the molten liquid is in a liquid state, it is sprayed onto a rotating copper rod through a long and narrow nozzle to obtain a nanocrystalline precursor (the process is rapid quenching and quenching); wherein, the width of the nanocrystalline ...

Embodiment 2

[0064] This embodiment provides a nanocrystalline flexible sheet whose components include Fe, Cu, Si, B, Nb, Mo and Ho, and the atomic percentages are 76.4at%, 0.6at%, 13at%, 8at%, 1.2at%, 0.5at% and 0.1at%, that is, the molecular formula is Fe 76.4 Cu 0.6 Si 13 B 8 Nb 1.2 Mo 0.5 Ho 0.1 .

[0065] The preparation method of the above-mentioned nanocrystalline flexible sheet is the same as that in Example 1.

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Abstract

The invention belongs to the technical field of wireless charging material preparation, and particularly relates to a nanocrystalline flexible sheet and a preparation method and application thereof. The nanocrystalline flexible sheet comprises the following components: Fe, Cu, Si, B, Nb, Mo and C, and further comprises rare earth metal, and the rare earth metal is at least one of Y, Dy, Gd, Tb, Ho, Er and Tm. When the nanocrystalline flexible sheet is used in the field of wireless charging, the power and efficiency of wireless charging can be improved, and the nanocrystalline flexible sheet has the advantage of being small in size and is beneficial for electronic equipment to develop towards the direction of higher frequency, higher efficiency and miniaturization; and meanwhile, the nanocrystalline flexible sheet has the condition of replacing ferrite to serve as a wireless charging material under the high-frequency working condition, and has the advantages of being high in magnetic conductivity, saturation flux density, magnetic conductivity and charging efficiency, low in temperature rise, small in size and the like at the same time.

Description

technical field [0001] The invention belongs to the technical field of preparation of wireless charging materials, and in particular relates to a nanocrystalline flexible sheet and its preparation method and application. Background technique [0002] With the emergence of the energy crisis and the development of science and technology, the world is paying more and more attention to energy saving and low-carbon environmental protection. Due to the advantages of energy saving and no emission of pollutants, electric vehicles have become one of the key development industries in various countries. However, due to the limitations of battery capacity, charging mode, charging efficiency, and battery life, electric vehicles have limited mileage and long charging time, making them unsuitable for medium and long-distance sailing, which limits the overall promotion of electric vehicles. Efficient and practical charging technology is one of the key technologies to accelerate the develop...

Claims

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Application Information

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IPC IPC(8): H01F27/255H01F1/147H01F41/02H02J50/10
CPCH01F27/255H01F1/14766H01F41/0246H02J50/10Y02T10/70
Inventor 杨富尧刘洋陈新宋文乐冯砚厅贺爱娜高洁董亚强黎嘉威马光程灵何承绪
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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