Fabrication method of soft magnetic alloy materials

A technology of soft magnetic alloy and processing method, which is applied in the fields of magnetism of inorganic materials, manufacturing of inductors/transformers/magnets, electrical components, etc., can solve the problems of high hysteresis loss of magnetic sheets, and achieve improved magnetic performance, reduced magnetic loss, and high saturation Effect of Magnetic Flux Density

Active Publication Date: 2014-08-27
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a method for preparing and processing a soft magnetic alloy material that increases the resistivity of magnetic powder to improve the magnetic properties of the magnetic powder in order to solve the defect of high hysteresis loss of the magnetic sheet in the existing high-frequency band

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A preparation and processing method of a soft magnetic alloy material, the preparation method comprising the steps of:

[0034] a) Flattening: Weigh 500 grams of FeSiAl magnetic powder and place it in a planetary grinding tank, which contains 3000 grams of Φ5.6mm carbon steel balls, add 300 grams of absolute ethanol, and stir for 3 hours at a speed of 30 Hz;

[0035] b) Drying and annealing: after the stirring, remove the organic solvent by filtration, then put the filter residue into an oven to dry at 80°C; the drying time is 12 hours, put the dried filter residue in a tube furnace, and raise the temperature to 550°C under the protection of nitrogen , after the furnace temperature is stable for 5 minutes, mix in air, the air accounts for 10% of the nitrogen volume in the furnace, and maintain it for 30 minutes;

[0036] c) Post-treatment: Then restore the atmosphere to full nitrogen protection, and keep warm for 25 minutes; after annealing, let the tube furnace cool...

Embodiment 2

[0038] Weigh 500 grams of FeSiCr magnetic powder and put it in a planetary grinding tank. There are 2500 grams of Φ5.6mm and Φ3.1mm carbon steel balls with a ratio of 1:1. Add 350 grams of acetone and additives. The additives are 0.495 grams of titanic acid The mixture of ester coupling agent and 0.005 g of carbon nanotubes was stirred at a speed of 30 Hz for 3 hours. After the stirring was completed, most of the organic solvent was removed by filtration, and then the filter residue was dried in an oven at 60°C for 5 hours. , put the dried filter residue in a tube furnace, raise the temperature to 600°C under the protection of nitrogen, and after the furnace temperature stabilizes for 5 minutes, pass in the water vapor generated by the steam generator, control the mixed gas at room temperature and relative humidity to 100%, and ventilate The time is 10 minutes, and then the atmosphere is restored to full nitrogen protection, and the temperature is kept for 47 minutes. After the...

Embodiment 3

[0040] Weigh 1000 grams of FeNiMo magnetic powder and put it in a sand mill. There are 8000 grams of carbon steel balls with a ratio of Φ5.6mm and Φ3.1mm in a ratio of 1:1. Add 700 grams of absolute ethanol. Stir for 15 hours. After the stirring is over, filter to remove most of the organic solvents, then put the filter residue in an oven and dry at 80°C for 8 hours. Put the dried filter residue in a bell furnace and heat it up to 500°C under nitrogen protection. After the temperature is stabilized for 5 minutes, the water vapor and air generated by the water steam generator are introduced, the relative humidity of the mixed gas is controlled at room temperature to 95%, the air volume ratio is 4%, and the ventilation time is 10 minutes, and then the atmosphere is restored to full nitrogen protection. Keeping the temperature for another 45 minutes, after the annealing, let the tube furnace cool down with the furnace under the protection of nitrogen atmosphere, so as to prepare s...

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Abstract

The invention relates to a fabrication method of soft magnetic alloy materials. The fabrication method includes flattening, drying and annealing, and post-treating. The surface of soft magnetic alloy powder is provided with a metal oxide film, so that magnetic loss of the powder is reduced on the premise of not reducing magnetic conductivity of the powder and magnetic performance of the powder is improved. The fabrication method is simple, low in cost, and suitable for large-scale batch production; the soft magnetic alloy materials fabricated can meet the high requirements for high saturation flux density, high magnetic conductivity, low iron loss, high strength and high productivity.

Description

technical field [0001] The invention relates to a production method of a soft magnetic material, in particular to a preparation and processing method of a soft magnetic alloy material that increases the resistivity of magnetic powder to improve the magnetic performance of the magnetic powder. [0002] Background technique [0003] At present, non-contact IC tags using RFID technology are more and more widely used. The IC tag activates the IC tag by sending electromagnetic waves of a predetermined frequency from the read / write transceiver antenna to the antenna coil, and then reads or writes information in the IC chip according to instructions contained in the electromagnetic waves. [0004] However, with the miniaturization trend of electronic equipment, the distance between IC tags and metal plates is getting shorter and shorter. Due to the influence of eddy current and metal on electromagnetic wave reflection, the reading and writing distance of IC tags is greatly sho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/20H01F41/02
Inventor 金江剑潘磊明金志洪於扬栋郝斌
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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