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Wireless charging magnetic core for intelligent watch and preparation method thereof

A wireless charging and smart watch technology, applied in transformer/inductor cores, circuits, inductors, etc., can solve the problems of small strength and toughness, low loss, etc., and achieve optimized particle size distribution, easy molding, and uniform particles. Effect

Active Publication Date: 2020-11-24
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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  • Wireless charging magnetic core for intelligent watch and preparation method thereof
  • Wireless charging magnetic core for intelligent watch and preparation method thereof
  • Wireless charging magnetic core for intelligent watch and preparation method thereof

Examples

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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 an intelligent watch and a preparation method thereof. Raw materials of the wireless charging magnetic core comprise a main component andan additive, the main component comprises 51.5 to 53.5% Fe2O3, 9.0 to 12.5% ZnO by mole percent, and the balance is MnO; and the additive comprises 100-600 ppm V2O5, 0-200 ppm MoO3, 2000-4500 ppm Co2O3, 100-1000 ppm CaCO3, and 100-500 ppm Nb2O5. The preparation method adopts centrifugal granulation and adopts sealing molding during integral molding. According to the wireless charging magnetic core, types and dosage of main component and additive are reasonably selected, and centrifugal granulation and sealing molding are used. The prepared wireless charging magnetic core has high planar inductance and profiling inductance, low loss in a wide temperature range, 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 Applications(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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