Preparation method for silicone iron cores with magnetic conductivity of 125

A technology of iron-silicon and magnetic cores, which is applied in the field of preparation of iron-silicon magnetic cores, can solve the problems of low magnetic permeability, high cost, and many processes, and achieve the effects of high magnetic permeability, low iron loss, and simple process steps

Active Publication Date: 2015-04-22
湖南普盛新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese patent application 200910095904.9 mentions the manufacturing method of iron-silicon alloy with a magnetic permeability of 60, which mainly uses the roasting process and strengthening treatment process, but the magnetic permeability of the product is low, the process is more, and the cost is higher

Method used

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  • Preparation method for silicone iron cores with magnetic conductivity of 125
  • Preparation method for silicone iron cores with magnetic conductivity of 125
  • Preparation method for silicone iron cores with magnetic conductivity of 125

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The change of magnetic permeability of magnetic powder during acid passivation was investigated.

[0035] Get iron-silicon powder, its composition is: Si: 6.5%, Fe: surplus, C<300ppm, O<2500ppm; Its particle size ratio is: +200 order powder accounts for 20%,-400 order powder material is 50%, The rest are -200 mesh ~ +400 mesh powder.

[0036] Weigh phosphoric acid according to the weight ratio of iron-silicon powder, dilute it with 25 times the weight of alcohol, add it to the iron-silicon powder, stir evenly, place it for 10 minutes, and spread it out to dry.

[0037] Then add the prepared silicone high-temperature adhesive (siloxane resin with a cracking temperature greater than 600°C), (1.2% + 25‰ alcohol) for stirring, spread it out to dry, and pass it through a 60-mesh screen before completely drying. Sieve to granulate and re-dry.

[0038] Add 0.5% zinc stearate and mix well. Formed F270125 product (outer diameter: 26.92mm, inner diameter: 14.73mm, height 11.18...

Embodiment 2

[0045] Prepare the iron-silicon magnetic core of magnetic permeability 125 by the method of the present invention, specifically as follows: get iron-silicon powder, its composition is: Si: 6.5%, Fe: surplus, C<300ppm, O<2500ppm; Particle size proportioning It is: +200 mesh powder accounts for 12%, -400 mesh powder accounts for 45%, and the rest is -200 mesh ~ +400 mesh powder.

[0046] The following auxiliary materials are weighed according to the weight ratio of iron silicon powder.

[0047] Weigh 1.2‰ phosphoric acid, dilute it with 25‰ alcohol, add it to the iron-silicon powder, stir evenly, let it stand for 15 minutes, spread it to a thickness of about 1cm to dry, and then add the prepared silicone high-temperature binder (the cracking temperature is greater than 600 ℃ siloxane resin), (1.2% + 25‰ alcohol) to stir, spread out and air well, sieve and granulate with a 60-mesh sieve before completely drying, and then dry again.

[0048] Add 0.5% zinc stearate and mix well. ...

Embodiment 3

[0059] Prepare iron-silicon magnetic core according to the method of the present invention, specifically as follows:

[0060] Get iron-silicon powder, its composition is: Si: 6.5%, Fe: balance, C<300ppm, O<2500ppm; Its particle size ratio is: +200 order powder accounts for 20%,-400 order powder material is 50%, The rest are -200 mesh ~ +400 mesh powder.

[0061] The following auxiliary materials are weighed according to the weight ratio of iron silicon powder.

[0062] Weigh 1.5‰ phosphoric acid, dilute it with 25‰ xylene, add it to the iron-silicon powder, stir evenly, let it stand for 15 minutes, spread it out to dry, and then add the prepared polyamide resin high-temperature binder (1.2%+25‰ Alcohol) to stir, spread out to dry, sieve and granulate with a 60 mesh screen before completely drying, and then re-dry;

[0063] Add 0.5% zinc stearate and mix well. Formed F330125 product (outer diameter: 33.02mm, inner diameter: 19.94mm, height 10.67mm), unit pressure is 16.5T / cm...

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Abstract

The invention relates to a preparation method for silicone iron cores. The preparation method includes that silicone iron powder core and silicone iron powder material are dry-press molded after acid treatment, the powder material is more prone to being molded, product density is improved, and meanwhile high magnetic conductivity of the product can be achieved after thermal treatment. Compared with the prior art, the preparation method for the silicone iron cores with the magnetic conductivity of 125 has the significant advantages that the magnetic conductivity of the manufactured silicone iron cores is 125 while iron loss is low and overlay performance is good, the process steps are simple, and raw and auxiliary material cost is low.

Description

technical field [0001] The invention relates to the field of metallic magnetic materials, in particular to a method for preparing an iron-silicon magnetic core with a magnetic permeability of 125. Background technique [0002] Soft magnetic materials have a history of more than 100 years of development from pure iron, silicon steel to permalloy. . New soft magnetic alloy materials such as amorphous alloys and nanocrystalline alloys developed successively in the past 20 years have made the structure of soft magnetic materials jump from crystalline to amorphous, and from amorphous to nanocrystalline. state, thus pushing the development and application of new soft magnetic alloy materials to a new climax. The magnetic core is a component composed of a mixture of soft magnetic materials, and the skeleton, coil, etc. are important parts of the transformer, which are widely used in coils and transformers of various electronic devices. It is widely used in information, energy st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F41/02H01F1/20H01F1/22B22F3/02
Inventor 王美华周孟军
Owner 湖南普盛新材料有限公司
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