Manufacturing method for ferrum-silicon-aluminum magnetic cores

An iron-silicon-aluminum and iron-silicon-aluminum powder technology is applied in the field of preparation of iron-silicon-aluminum magnetic cores, which can solve the problems of high technical difficulty, high equipment and process requirements, and achieve the effects of simple process steps, good superposition performance, and improved product density.

Active Publication Date: 2013-03-20
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

The sendust magnetic powder core can meet the above requirements, but now the magnetic permeability of the sendust magnetic core is generally below 125, and the magnetic permeability is 147. The preparation method of the sendust magnetic powder core is technically difficult and requires high equipment and technology. Domestic under development

Method used

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  • Manufacturing method for ferrum-silicon-aluminum magnetic cores
  • Manufacturing method for ferrum-silicon-aluminum magnetic cores
  • Manufacturing method for ferrum-silicon-aluminum magnetic cores

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The change of magnetic permeability of magnetic powder during acid passivation was investigated.

[0033] Get iron-silicon powder, its composition is: Si: 6.5%, Fe: balance, C<300ppm, O<2500ppm; Its particle size ratio is: +180 order powder accounts for 10%,-400 order powder material is 50%, The rest are -180 mesh ~ +400 mesh powder.

[0034] 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.

[0035] 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 out about 1cm in thickness and let it dry; use a 60-mesh sieve before completely drying Sieve through a net to granulate, and then re-dry;

[0036] Add 0.5% zinc stearate and mix well. Dry pressing S270147 product (outer diameter: 26.92mm, in...

Embodiment 2

[0042] Prepare sendust magnetic core according to the method of the present invention, specifically as follows:

[0043] Take sendust powder, its composition is: Al: 5.4%, Si: 9.6%, Fe: the balance; the particle size ratio is: +180 mesh powder accounts for 8%, -400 mesh powder is 45%, and the rest is - 180 mesh ~ +400 mesh powder.

[0044] The following auxiliary materials are weighed according to the weight ratio of sendust powder.

[0045] Weigh 1.5‰ phosphoric acid, dilute it with 30‰ alcohol, add it to the sendust powder, stir evenly, let it stand for 15 minutes, spread it out to dry, and then add the prepared silicone high-temperature binder (the cracking temperature is greater than 600°C Silicone resin) (1.2%+25‰ alcohol) was stirred, spread out to a thickness of about 1cm and aired well; sieved and granulated with a 60-mesh sieve before complete drying, and then dried again;

[0046] Add 0.5% zinc stearate and mix well. Dry pressing S270147 product (outer diameter: 2...

Embodiment 3

[0055] Prepare sendust magnetic core according to the method of the present invention, specifically as follows:

[0056] Get sendust powder, its composition is: Al: 5.4%, Si: 9.6%, Fe: balance; Its particle size ratio is: +180 mesh powder accounts for 10%, -400 mesh powder is 50%, the rest is -180 mesh ~ +400 mesh powder.

[0057] The following auxiliary materials are weighed according to the weight ratio of sendust powder.

[0058] Weigh 1.2‰ phosphoric acid, dilute it with 30‰ xylene, add it to the sendust 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 ‰ xylene) was stirred, spread out and aired for 5 minutes, sieved and granulated with a 60-mesh sieve when half-dried, and then re-dried;

[0059] Add 0.5% zinc stearate and mix well. Molded S330147A product (outer diameter: 33.02mm, inner diameter: 19.94mm, height 7.50mm), unit pressure is 18.5T / cm 2 ;

[0060] Then push p...

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Abstract

The invention relates to a manufacturing method for ferrum-silicon-aluminum magnetic cores. The manufacturing method for the ferrum-silicon-aluminum magnetic cores includes that ferrum-silicon-aluminum magnetic powder is processed through acid and then dry-pressed, so that the power is easy to mold, product density is improved, and meanwhile, the power can achieve high magnetic conductivity after heat treatment. Compared with the prior art, the manufacturing method for the ferrum-silicon-aluminum magnetic cores has the advantages that by means of control of the appending proportion, intensity of pressure of molding, sintering temperature and the like in power allocation, the ferrum-silicon-aluminum magnetic cores with 147 (+/- 8%) of magnetic conductivity are manufactured, and the ferrum-silicon-aluminum magnetic cores are low in iron loss and good in composition performance; process sequences are simple; and raw and auxiliary materials are low in cost.

Description

technical field [0001] The invention relates to the field of metallic magnetic materials, specifically, to a method for preparing a sendust magnetic core with a magnetic permeability of 147 (±8%). 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. Widely used in various fields such as informat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/02H01F1/20H01F1/22B22F3/02
Inventor 罗建桥王美华
Owner 湖南普盛新材料有限公司
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