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High magnetic permeability, high frequency and high impedance soft magnetic material and preparation method thereof

A technology of soft magnetic materials and high magnetic permeability, which is applied in the field of high-frequency high-impedance soft magnetic materials and high magnetic permeability, can solve the problems of high-frequency impedance characteristics, large magnetic core volume, and high cost, and achieve High-frequency filtering effect is good, the number of coil turns is small, and the cost is low

Active Publication Date: 2021-01-15
广东佛山金刚磁业有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] With the continuous improvement of EMI requirements for electrical appliances, how to effectively reduce and suppress high-frequency clutter interference in power circuits is the main task of high-frequency filters. However, the magnetic permeability of existing materials is about 10,000 under the condition of 10KHZ, but The magnetic permeability of 200KHZ is only about 5000~7000, and the drop rate reaches 40%~50%.
The existing technology cannot solve the high-frequency impedance characteristics of the material of manganese-zinc ferrite ui=10000, resulting in filters made of existing magnetic materials, which have many coils, large magnetic cores, and high cost

Method used

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  • High magnetic permeability, high frequency and high impedance soft magnetic material and preparation method thereof
  • High magnetic permeability, high frequency and high impedance soft magnetic material and preparation method thereof
  • High magnetic permeability, high frequency and high impedance soft magnetic material and preparation method thereof

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preparation example Construction

[0051] Correspondingly, the present invention also provides a method for preparing a soft magnetic material with high magnetic permeability, high frequency and high impedance characteristics, including:

[0052] Step A: Proportion the content of main ingredients, then add deionized water to the sand mill for mixing and crushing, and add PVA solution after recirculation mixing;

[0053] In the step A: the crushing lasts for 25-35 minutes, and the circular mixing lasts for 8-15 minutes, which can improve the crushing effect, optimize the main component process and physical and chemical properties.

[0054] Step B: putting the crushed and mixed main ingredients into a pre-burning furnace for pre-burning;

[0055] In the step B: the temperature in the pre-sintering furnace is controlled at 850-950° C., and the pre-sintering furnace is kept warm for 2.5-3.5 hours, which can further optimize the main component process and physical and chemical properties, and improve the crystal str...

Embodiment 1

[0068] 1. Ingredients:

[0069] Weigh Fe 2 o 3 :51.5mo1%; ZnO:21.3mo1%; MnO:27.2mo1%, the three raw materials are Taiwan Zhongganghong, Hunan Jinrui Sanmeng Tetroxide, Shanghai Jinghua Zinc Oxide, and add 15wt% ionized water into the sand mill Mixing and crushing were carried out, the crushing was carried out for 45 minutes, and after 10 minutes of circulating mixing, 1.4 wt% PVA solution was added for spray granulation.

[0070] 2. Pre-burning:

[0071] Put the sprayed material into the pre-fired furnace, and heat it at 860°C for 3 hours for pre-fired.

[0072] 3. Secondary sanding:

[0073] Add the following auxiliary component Nb according to the weight percentage of calcined material in calcined material 2 o 5 0.020wt%, CaO 0.04wt%, MoO 3 0.03wt%, V 2 o 5 is 0.02wt%, and ZrO is 0.02wt%.

[0074] Then put the powder into a sand mill and add 15wt% deionized water for secondary sand milling. The sand milling time is 60 minutes, and the particle size of the powder is...

Embodiment 2

[0084] 1. Ingredients:

[0085] Weigh Fe 2 o 3: 51.35mol%; ZnO: 21.3mol%; MnO: 27.45mol%, the three raw materials are Korean EG Iron Red, Hunan Jinrui Sanmeng Tetroxide, Shanghai Jinghua Zinc Oxide, and add 15wt% ionized water into the sand mill Mixing and crushing were carried out, the crushing was carried out for 45 minutes, and after 10 minutes of circulating mixing, 1.4 wt% PVA solution was added for spray granulation.

[0086] 2. Pre-burning:

[0087] Put the sprayed material into the pre-fired furnace, and heat it at 860°C for 3 hours for pre-fired.

[0088] 3. Secondary sanding:

[0089] Add the following auxiliary component Nb according to the weight percentage of calcined material in calcined material 2 o 5 0.020wt%, CaO 0.04wt%, MoO 3 0.03wt%, V 2 o 5 is 0.02wt%, and ZrO is 0.02wt%. Then put the powder into a sand mill and add 15wt% deionized water for secondary sand milling, the sand milling time is 60 minutes, and the particle size of the powder is contro...

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Abstract

The invention discloses a soft magnetic material with high magnetic permeability, high frequency and high impedance. The soft magnetic material includes main materials and auxiliary materials, whereinthe main materials include Fe2O3 48-57mol%, ZnO 18-25mol% and MnO 21-28mol%, and the auxiliary materials include CaO 0.01-0.06wt%, MoO3 0.02-0.07wt%, V2O5 0.02-0.08wt%, ZrO 0.010-0.070wt% and Nb2O5 0.020-0.090wt %. Correspondingly, the invention also provides a preparation method for the soft magnetic material with high magnetic permeability, high frequency and high impedance. According to the prepared soft magnetic material, the magnetic permeability at 200 KHZ and 10 KHZ is not attenuated basically, and the soft magnetic material has higher impedance compared with general 10000Mui.

Description

technical field [0001] The invention relates to the field of special materials for electronic equipment, in particular to a magnetic material, more specifically a soft magnetic material with high magnetic permeability, high frequency and high impedance characteristics. Background technique [0002] With the development of miniaturization of electronic instruments and electronic equipment, the supporting magnetic core products are required to be smaller in size and higher in performance. In summary, there are four requirements: high initial permeability, high permeability at wide frequency, high impedance at high frequency, and low permeability sensitivity to stress. [0003] The development direction is to seek electronic devices with small volume, low loss in the circuit, high efficiency, and light weight. Products with high magnetic permeability are generally used in common-mode filters, saturated inductors, current transformers, and leakage protection of high-frequency sw...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/36H01F41/00C04B35/38C04B35/622
CPCC04B35/2633C04B35/2658C04B35/622C04B2235/3208C04B2235/3239C04B2235/3244C04B2235/3251C04B2235/3256C04B2235/3262C04B2235/3284C04B2235/608C04B2235/656C04B2235/6583H01F1/36H01F41/00
Inventor 冯斌刘关生王京平段庆娃黄小刚练炜科
Owner 广东佛山金刚磁业有限公司
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