A wireless charging magnetic core for smart watches and its preparation method

A technology for wireless charging and smart watches, applied in transformer/inductor magnetic cores, circuits, inductors, etc., can solve the problems of strength and toughness, small volume, low loss, etc., achieve optimized particle size distribution, small deformation, and improve temperature characteristics and the effect of high frequency eddy current loss

Active Publication Date: 2022-02-18
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the current lack of magnetic cores in the prior art that can meet the requirements of high planar inductance and profiling inductance, low loss, high strength and toughness, small volume, and ultra-thin height required by smart watch wireless charging magnetic cores. In order to solve the problem of core products, a wireless charging magnetic core for smart watches and its preparation method are provided. The magnetic core product is small in size, ultra-thin in height, high in strength and toughness, and can achieve low loss in a wide temperature range, and With high planar inductance and square inductance, it meets the wireless charging requirements of smart watches

Method used

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  • A wireless charging magnetic core for smart watches and its preparation method
  • A wireless charging magnetic core for smart watches and its preparation method
  • A wireless charging magnetic core for smart watches and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0073] A wireless charging magnetic core for a smart watch, the raw material includes a main component and an additive, and the main component includes 52.5% Fe in molar percentage 2 o 3 , 11% of ZnO and 36.5% of MnO; additives include 400ppm of V 2 o 5 , 100ppm MoO 3 , 3000ppm of Co 2 o 3 , 500ppm of CaCO 3 and 300ppm Nb 2 o 5 .

[0074] The preparation method of the above-mentioned wireless charging magnetic core for smart watches comprises the following steps:

[0075] (1) Ingredients: Weigh the main ingredients in proportion, mix and stir for 30 minutes and vibrate for 30 minutes, then centrifugally granulate to obtain the main ingredients;

[0076] (2) Pre-burning: the main material is pre-fired at 940°C to obtain pre-fired material;

[0077] (3) Secondary sand grinding: put the calcined material into the sand mill and add additives and deionized water, and obtain the secondary sand abrasive after 140 min of secondary sand grinding;

[0078] (4) Centrifugal gra...

Embodiment 2

[0082] A wireless charging magnetic core for a smart watch, the raw material includes a main component and an additive, and the main component includes 51.5% Fe in molar percentage2 o 3 , 12.5% ​​of ZnO and 36% of MnO; additives include 100ppm of V 2 o 5 , 2000ppm of Co 2 o 3 , 100ppm of CaCO 3 and 100ppm Nb 2 o 5 .

[0083] The preparation method of the above-mentioned wireless charging magnetic core for smart watches comprises the following steps:

[0084] (1) Ingredients: Weigh the main ingredients in proportion, mix and stir for 25 minutes and vibrate for 35 minutes, then centrifugally granulate to obtain the main ingredients;

[0085] (2) Pre-burning: the main material is pre-fired at 930°C to obtain pre-fired material;

[0086] (3) Secondary sand grinding: Put the calcined material into the sand mill and add additives and deionized water, and obtain the secondary sand abrasive after 130 minutes of secondary sand grinding;

[0087] (4) Centrifugal granulation: ad...

Embodiment 3

[0091] A wireless charging magnetic core for a smart watch, the raw material includes a main component and an additive, and the main component includes 53.5% Fe in molar percentage 2 o 3 , 9.0% of ZnO and 37.5% of MnO; additives include 600ppm of V 2 o 5 , 200ppm MoO 3 , 4500ppm of Co 2 o 3 , 1000ppm of CaCO 3 and 500ppm Nb 2 o 5 .

[0092] The preparation method of the above-mentioned wireless charging magnetic core for smart watches comprises the following steps:

[0093] (1) Ingredients: Weigh the main ingredients in proportion, mix and stir for 35 minutes and vibrate for 25 minutes, then centrifugally granulate to obtain the main ingredients;

[0094] (2) Pre-burning: the main material is pre-fired at 950°C to obtain pre-fired material;

[0095] (3) Secondary sand grinding: put the calcined material into the sand mill, add additives and deionized water, and obtain the secondary sand abrasive after the second sand grinding for 150min;

[0096] (4) Centrifugal gra...

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Abstract

The invention discloses a wireless charging magnetic core for a smart watch and a preparation method thereof. The raw material includes a main component and an additive, and the main component includes 51.5-53.5% Fe in molar percentage 2 o 3 , 9.0~12.5% ​​ZnO, the balance is MnO; additives include 100~600ppm V 2 o 5 , 0~200ppm of MoO 3 , 2000~4500ppm of Co 2 o 3 , 100~1000ppm of CaCO 3 and 100~500ppm Nb 2 o 5 . In the preparation method, centrifugal granulation is adopted and sealing molding is adopted during integral molding. The present invention rationally selects the types and dosages of the main components and additives, and uses centrifugal granulation and sealing molding, so that the prepared wireless charging magnetic core has high planar inductance and profiling inductance, low loss in a wide temperature range, and sufficient strength and toughness to meet the requirements of use.

Description

technical field [0001] The invention relates to the technical field of magnetic materials used in the communication field, in particular to a wireless charging magnetic core for smart watches and a preparation method thereof. Background technique [0002] A smart watch is an electronic device that not only indicates time, but also has one or more functions such as reminder, navigation, calibration, monitoring, and interaction. Smart watches have many advantages such as easy to carry, close to the human body, and can quickly perceive human needs. Combining big data, Internet of Things technology, and introducing artificial intelligence technology, real human-computer interaction can be realized. In the future, smart watches will become an important key node for the interconnection of people and other objects. Through voice interaction, virtual keyboard and virtual large screen and many other ways to realize input and output, a world of human body networking will be formed. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/26C04B35/622H01F27/24H01F38/14
CPCC04B35/2658C04B35/622H01F27/24H01F38/14C04B2235/3275C04B2235/3239C04B2235/3208C04B2235/3279C04B2235/6022C04B2235/6567
Inventor 厉永平张小杭
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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