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Production method of high-Q-value manganese-zinc ferrite powder

A technology of manganese zinc ferrite and production method, which is applied in the production field of high Q value manganese zinc ferrite powder, can solve the problems of high Q value of the magnetic core, unstable electromagnetic performance, burn-in, etc., and achieve power reduction The effect of loss

Inactive Publication Date: 2014-11-26
WUXI SPINEL MAGNETICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These high-performance requirements also put forward higher requirements for the core of the transformer --- the magnetic core, the most important of which is that the Q value of the magnetic core should be high, and the heat generation at low temperature should be low, otherwise it is easy to produce electromagnetic properties Instability, serious accidents such as burn-in will occur

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The main material is 53mol% Fe 2 o 3 , 10mol% of ZnO and 37mol% of MnO.

[0017] According to the total mass of the above main ingredients, the amount of additives is as follows: CaCO 3 500ppm, V 2 o 5 100ppm, Nb 2 o 5 300ppm, WO 3 100ppm, TiO 2 100ppm, Co 2 o 3 200ppm, CuO 100ppm, NiO 200ppm.

[0018] The main materials are mixed and rolled into flakes, and then sent to the rotary kiln for pre-burning. The temperatures of the four heating groups of the rotary kiln are: 920, 980, 980, and 980°C, and the frequency of the frequency converter is 35Hz. After black vibration (that is, crushing), the magnetization degree of the obtained material: 1.7A m 2 / kg, tapping density: 1.28g / cm 3 , Average particle size: 1.5μm.

[0019] The main material is pre-fired and black-vibrated, and then mixed with additives for sand milling. The time is 110 minutes. The average particle size after sand milling is 0.79 μm, and the powder is obtained after drying. Magnetizati...

Embodiment 2

[0026] The main material is 53mol% Fe 2 o 3 , 10mol% of ZnO and 37mol% of MnO.

[0027] According to the total mass of the above main ingredients, the amount of additives is as follows: CaCO 3 300ppm, V 2 o 5 100ppm, Nb 2 o 5 200ppm, WO 3 100ppm, TiO 2 100ppm, Co 2 o 3 100ppm, CuO 100ppm, NiO 200ppm.

[0028] The main materials are mixed and rolled into flakes, and then sent to the rotary kiln for pre-burning. The temperatures of the four heating groups of the rotary kiln are: 920, 980, 980, and 980°C, and the frequency of the frequency converter is 35Hz. After black vibration (that is, crushing), the magnetization degree of the obtained material: 1.9A m 2 / kg, tapping density: 1.28g / cm 3 , Average particle size: 1.5μm.

[0029] The main material is pre-fired and black-vibrated, and then mixed with additives for sand milling. The time is 110 minutes. The average particle size after sand milling is 0.79 μm, and the powder is obtained after drying. Magnetizati...

Embodiment 3

[0036] The main material is 53mol% Fe 2 o 3 , 12mol% of ZnO and 35mol% of MnO.

[0037] According to the total mass of the above main ingredients, the amount of additives is as follows: CaCO 3 400ppm, V 2 o 5 200ppm, Nb 2 o 5 500ppm, WO 3 150ppm, TiO 2 50ppm, Co 2 o 3 100ppm, CuO 50ppm, NiO 150ppm.

[0038] The main materials are mixed and rolled into flakes, and then sent to the rotary kiln for pre-burning. The temperatures of the four heating groups of the rotary kiln are: 920, 980, 980, and 980°C, and the frequency of the frequency converter is 35Hz. After black vibration (that is, crushing), the magnetization degree of the obtained material: 1.6A m 2 / kg, tapping density: 1.26g / cm 3 , Average particle size: 1.8μm.

[0039] The main material is pre-fired and blackened, and then mixed with additives for sand milling. The time is 110 minutes. The average particle size after sand milling is 0.82 μm, and the powder is obtained after drying. Magnetization degr...

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Abstract

The invention discloses a production method of high-Q-value manganese-zinc ferrite powder. The main material is composed of 53-56 mol% of Fe2O3, 8-12 mol% of ZnO and the balance of MnO. The additives comprise 200-500 ppm of CaCO3, 0-200 ppm of V2O5, 200-500 ppm of Nb2O5, 100-300 ppm of WO3, 0-200 ppm of TiO2, 100-400 ppm of Co2O3, 0-200 ppm of CuO and 0-200 ppm of NiO. The production method comprises the following steps: rolling the main material, presintering and vibrating until the impact density is greater than or equal to 1.20 g / cm<3> and the average particle size is less than or equal to 1.8mm; mixing with the additives, and sanding until the average particle size is less than or equal to 0.85 mu m; and drying to obtain the powder. Compared with the traditional method, the method disclosed by the invention can enhance the Q value of the magnetic core and lower the power consumption.

Description

technical field [0001] The invention belongs to the field of high-Q manganese-zinc ferrite, and in particular relates to a production method of high-Q manganese-zinc ferrite powder. Background technique [0002] In the daily production of electromagnetic and inductive products, various high-Q filters, tuned filters, load coils, impedance matching transformers, wiring sensors, etc. are often used. These transformers have high working frequency (100-500KHz), wide working voltage range and high output power. These high-performance requirements also put forward higher requirements for the core of the transformer --- the magnetic core, the most important of which is that the Q value of the magnetic core should be high, and the heat generation at low temperature should be low, otherwise it is easy to produce electromagnetic properties Instability, serious accidents such as burn-in may occur. [0003] The dry production process of the existing manganese zinc ferrite core is basic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/626
Inventor 刘洪建
Owner WUXI SPINEL MAGNETICS