A preparation method for producing low-loss powder for integrated molding inductors

A low-loss, inductive technology, applied in the manufacture of inductors/transformers/magnets, circuits, electrical components, etc., can solve the problems of unsatisfactory improvement effects, singleness, and no comprehensive consideration, and achieve small anisotropic constants of magnetocrystals, High efficiency, the effect of improving efficiency

Active Publication Date: 2021-01-05
深圳市艺感科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, these methods are only aimed at improving the core density of the integrated inductor, without comprehensive consideration of other factors, so the improvement effect is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] The invention provides a preparation method for producing low-loss powder for integrally formed inductors, comprising the following steps:

[0025] Mixed powder preparation: the mixed powder is made by mixing the first powder, the second powder and the third powder, wherein the first powder is carbonyl iron powder, D50 is 6-7um, and the mass percentage is 20-40 %, wherein the second powder is carbonyl iron powder, D50 is 3-4um, and the mass percentage is 30-40%, wherein the third powder is iron-silicon powder or amorphous powder, D50 is 10-15um, and the mass percentage is 30% ~40%; Among them, iron-silicon powder adopts iron-silicon 6.5 powder;

[0026] Phosphating treatment: take phosphoric acid at 0.1-1.5% of the mass of the mixed powder, take acetone at 5-10% of the mass of the mixed powder, dilute the phosphoric acid with the acetone evenly, add it to the mixed powder, and stir well After drying, bake at 60-80°C for 1-2 hours, and the phosphating treatment is compl...

Embodiment 1

[0037] Prepare 1000g of mixed powder, wherein the first powder is carbonyl iron powder of D50=6.1um, quality 300g, wherein the second powder is carbonyl iron powder of D50=3.1um, quality 350g, wherein the third powder is D50= 10.2um iron silicon 6.5 powder, mass 350g, mix the three powders evenly;

[0038] Take 2g of phosphoric acid and dilute it in 60g of acetone, add it into 1000g of mixed powder after dilution evenly, stir evenly, dry in the air, then bake at 60°C for 2 hours to obtain the mixed powder after phosphating treatment;

[0039]Take 12g of epoxy resin and 12g of silicone resin, dissolve them in 60g of acetone successively, dissolve them evenly, add them to the mixed powder after phosphating treatment, stir for 30 minutes to form a slurry, granulate, dry in the air, and then bake at 90°C Bake for 2 hours, add 2g of zinc stearate after natural cooling, stir evenly, and sieve to take 40-300 mesh as good product particles;

[0040] Take good product particles, press...

Embodiment 2

[0046] Prepare 1000g of mixed powder, wherein the first powder is carbonyl iron powder of D50=6.3um, quality 400g, wherein the second powder is carbonyl iron powder of D50=3.5um, quality 300g, wherein the third powder is D50= 12.3um iron silicon 6.5 powder, mass 300g, mix the three powders evenly;

[0047] Take 3g of phosphoric acid and dilute it in 80g of acetone, add it into 1000g of mixed powder after dilution evenly, stir evenly, dry in the air, then bake at 70°C for 2 hours to obtain the mixed powder after phosphating treatment;

[0048] Take 15g of epoxy resin and 15g of silicone resin, dissolve them in 80g of acetone successively, dissolve them evenly, add them to the phosphating-treated mixed powder, stir for 35 minutes to become a slurry, granulate, dry in the air, and then bake at 90°C Bake for 2 hours, add 3g of zinc stearate after natural cooling, stir evenly, and sieve to take 40-300 mesh as good product particles;

[0049] Take good product particles, press them...

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PUM

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Abstract

The invention discloses a method for preparing low-loss powder for integrally formed inductors. The mixed powder material is mixed with the first powder material, the second powder material and the third powder material. The first powder material is carbonyl iron powder , D50 is 6-7um, mass percentage 20-40%, the second powder is carbonyl iron powder, D50 is 3-4um, mass percentage is 30-40%, the third powder is iron silicon powder or amorphous powder, D50 10 ~ 15um, mass percentage 30 ~ 40%; after phosphating the mixed powder, add the glue solution into the phosphating mixed powder, stir evenly to form a slurry, dry it after granulation, and dry it at 90 ~ Bake at 120°C for 1 to 2 hours, after natural cooling, add zinc stearate at 0.2 to 0.5% of the mass of the mixed powder, stir well and sieve, take 40 to 300 mesh particles, and obtain the integrated molded inductor. Low-loss powder: the powder prepared by the present invention is a high-sensitivity, low-loss powder, and the integrally formed inductance processed by using the powder has low loss and high efficiency.

Description

technical field [0001] The invention belongs to the technical field of manufacturing passive electronic components, and in particular relates to a preparation method of low-loss powder for integrally formed inductors. Background technique [0002] At present, during the production of integrally formed inductors, the electrically connected coil and electrode terminals are first put into the production mold, and then carbonyl iron powder, reduced iron powder, iron silicon powder, sendust aluminum powder, alloy powder, amorphous The powder prepared by powder, etc. is filled and compacted into a whole by upper and lower punches, and then cured at high temperature. It has the advantages of strong anti-electromagnetic interference, small size, high current, and low power consumption. [0003] In order to adapt to the market demand for high efficiency and low loss in the use of integrated molded inductors with the development of circuit technology, a method of grading the same powd...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/12H01F1/22H01F41/02B22F1/00B22F3/02B22F5/10
CPCH01F1/12H01F1/22H01F41/0246B22F3/02B22F5/106B22F1/145
Inventor 田林武卫锋
Owner 深圳市艺感科技有限公司
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