Magnetic isolation sheet for wireless charging and preparation method thereof

A technology of wireless charging and magnetic isolation sheet, which is applied in the direction of inorganic material magnetism, can solve the problems of high loss and low Bs of magnetic isolation sheet, and achieve the effect of high Bs and low loss

Active Publication Date: 2021-07-30
娄底市玖鑫电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a magnetic isolation sheet for wireless charging and a preparation method to solve the problem that the Bs of the magnetic isolation sheet is low and the loss is high when the existing magnetic isolation sheet preparation method is used to prepare a larger size magnetic isolation sheet

Method used

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  • Magnetic isolation sheet for wireless charging and preparation method thereof

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Embodiment 1

[0041] The embodiment of the present application provides a preparation method of a magnetic isolation sheet for wireless charging, the preparation method comprising:

[0042] S101: The raw materials for preparing the magnetic isolation sheet are Fe according to the mass ratio 2 o 3 69.5%, Mn 3 o 4 23% and ZnO7.5% are uniformly mixed and then tableted to obtain raw material tablets.

[0043] S102: Pre-fire the raw material sheet at a temperature of 950°C until the tap density of the pre-fired raw material sheet is 1.3 g / cm 3 .

[0044] S103: Pulverize the calcined raw material pieces to form a pulverized material.

[0045] S104: Mix crushed materials, auxiliary materials, polyvinyl alcohol glue and deionized water to form a mixture. The rotational speed of the mixture was sand-milled at 2000r / min, the sand-milling time was 180min, and the sand-milled particle size was 0.8μm. The auxiliary materials include calcium carbonate, vanadium pentoxide, niobium pentoxide, elemen...

Embodiment 2

[0053] The embodiment of the present application provides a preparation method of a magnetic isolation sheet for wireless charging, the preparation method comprising:

[0054] S201: The raw materials for preparing the magnetic isolation sheet are Fe according to the mass ratio 2 o 3 69.5%, Mn 3 o 4 23% and ZnO7.5% are uniformly mixed in proportion and then tableted to obtain raw material tablets.

[0055] S202: Pre-fire the raw material sheet at a temperature of 948°C until the tap density of the pre-fired raw material sheet is 1.5 g / cm 3 .

[0056] S203: Pulverize the calcined raw material pieces to form a pulverized material.

[0057] S204: Mix crushed materials, auxiliary materials, polyvinyl alcohol glue and deionized water to form a mixture. The rotation speed of the mixture was 2000r / min, the sanding time was 120min, and the sanding time was 1.4μm. The auxiliary materials include calcium carbonate, vanadium pentoxide, niobium pentoxide, elemental iron and dicobalt...

Embodiment 3

[0065] The embodiment of the present application provides a preparation method of a magnetic isolation sheet for wireless charging, the preparation method comprising:

[0066] S301: The raw materials for preparing the magnetic isolation sheet are Fe according to the mass ratio 2 o 3 65%, MnO26% and ZnO9% are uniformly mixed in proportion and then tableted to obtain raw material tablets.

[0067] S302: Pre-fire the raw material sheet at a temperature of 945°C until the tap density of the pre-fired raw material sheet is 1.3g / cm 3 .

[0068] S303: Pulverize the calcined raw material pieces to form a pulverized material.

[0069] S304: Mix crushed materials, auxiliary materials, polyvinyl alcohol glue and deionized water to form a mixture. The rotational speed of the mixture was sand-milled at 2000r / min, the sand-milling time was 90min, and the sand-milled particle size was 1.2μm. The auxiliary materials include calcium carbonate, vanadium pentoxide, niobium pentoxide, elemen...

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Abstract

The invention provides a magnetic isolation sheet for wireless charging and a preparation method thereof. The present invention prepares high Bs and low-loss powders through tunnel kiln debinding, bell furnace sintering and slicing after raw material batching, tabletting, low-temperature pre-firing, adding trace auxiliary materials and other substances, spray granulation, and compression molding. Magnetic isolation sheet. At the same time, the preparation method of the magnetic isolation sheet for wireless charging provided by the present invention can prepare the magnetic isolation sheet in batches to meet production requirements.

Description

technical field [0001] The invention relates to the technical field of wireless charging, in particular to a magnetic isolation sheet for wireless charging and a preparation method thereof. Background technique [0002] As a safe, fashionable and convenient new charging method, wireless charging is increasingly favored by consumers, and it is developing rapidly in the field of consumer electronics such as mobile phones and computers. [0003] During the working process of the wireless charging device, the transmitting end and the receiving end each have a coil. The transmitting end coil is connected to a wired power supply and generates an electromagnetic signal. The receiving end coil induces the electromagnetic signal at the transmitting end to generate current to charge the battery. The magnetic isolation sheet attached to the sending end can enhance the magnetic field strength of the coil, and at the same time has a high magnetic convergence effect; the magnetic isolatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/34C04B35/38
CPCC04B35/2658C04B2235/3239C04B2235/3251C04B2235/3275C04B2235/405C04B2235/442C04B2235/608
Inventor 林开品朱再元
Owner 娄底市玖鑫电子科技有限公司
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