Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Preparation method of high-impedance iron-silicon material and integrated inductor containing the iron-silicon material

A high-impedance, iron-silicon technology, applied in the field of inductors, can solve the problems of shortening the service life of integrated inductors, easily generating microcracks, poor insulation performance, etc., to improve DC superposition performance, improve coating effect, and good insulation effect Effect

Active Publication Date: 2020-07-17
HENGDIAN GRP DMEGC MAGNETICS CO LTD
View PDF15 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The first object of the present invention is to overcome the poor formability of the gas atomized powder in the magnetic core of the integrated inductor in the prior art, and the insulating coating method and coating material in the prior art cannot A good insulating coating film is formed on the surface of the powder, resulting in poor insulation performance between the powder and large core loss. A preparation method for a high-impedance iron-silicon material and an integrated inductor containing the iron-silicon material are provided. The magnetic core can effectively improve the particle shape of the powder, greatly improve the insulation between the powder, reduce the loss of the magnetic core, and improve the overall performance of the integrated inductor
[0006] The second object of the present invention is to overcome the problems of micro-cracks in the integrated inductor in the prior art under the action of electricity, heat and mechanical stress during production, transportation and use, shortening the life of the integrated inductor. To solve the problem of service life, a preparation method of high-impedance iron-silicon material and an integrated inductance core containing the iron-silicon material are provided, so that the microcracks generated in the integrated inductance core can be self-repaired, and the use of the integrated inductance is improved. life

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of high-impedance iron-silicon material and integrated inductor containing the iron-silicon material
  • Preparation method of high-impedance iron-silicon material and integrated inductor containing the iron-silicon material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Powder selection and processing: choose water-atomized iron-silicon powder with a particle size of 400 mesh, and perform ball milling for 30 minutes;

[0040]Insulation coating: Slowly pour 30g of phosphoric acid, 5g of aluminum dihydrogen phosphate and 5g of chromic acid into 1.2kg of acetone and stir for more than 1 minute to dilute completely to obtain a coating solution, which is added to 10kg of water atomized iron silicon Stir in the powder evenly, soak for 5 minutes, then stir for 30 minutes, dry the powder in the air for 3 hours in a ventilated environment, sieve through a 50-mesh sieve, and then bake in an oven at 100°C for 1 hour;

[0041] Secondary coating: Mix 200g of silicone resin and 100g of liquid glue evenly, let stand for 5min, stir for 1min, add 1kg of acetone to dilute and stir evenly for 10min, then filter the solution with 200 mesh to remove impurities, and obtain Secondary coating solution, add the secondary coating solution to the water atomized ...

Embodiment 2

[0045] Powder selection and processing: choose water-atomized iron-silicon powder with a particle size of 500 mesh, and perform ball milling for 60 minutes;

[0046] Insulation coating: Slowly pour 15g of phosphoric acid and 5g of potassium water glass into 1.3kg of acetone and stir for more than 1 minute to dilute completely to obtain a coating solution, add the coating solution to 10kg of water atomized iron-silicon powder and stir evenly , soaked for 10 minutes, then stirred for 60 minutes, dried the powder in the air for 4 hours in a ventilated environment, sifted through a 50-mesh screen, and then baked in a 90°C oven for 2 hours;

[0047] Secondary coating: Mix 100g silicone resin and 100g liquid glue evenly, let stand for 15min, stir for 1min, add 1.1kg of acetone to dilute and stir evenly, let stand for 10min, then filter the solution with 200 mesh to remove impurities, and make To obtain the secondary coating solution, add the secondary coating solution into the water...

Embodiment 3

[0051] Powder selection and processing: choose water-atomized iron-silicon powder with a particle size of 400 mesh, and perform ball milling for 30 minutes;

[0052] Insulation coating: Slowly pour 30g of phosphoric acid, 5g of aluminum dihydrogen phosphate and 5g of chromic acid into 1.2kg of acetone and stir for more than 1 minute to dilute completely to obtain a coating solution, which is added to 10kg of water atomized iron silicon Stir in the powder evenly, soak for 5 minutes, then stir for 30 minutes, dry the powder in the air for 3 hours in a ventilated environment, sieve through a 50-mesh sieve, and then bake in an oven at 100°C for 1 hour;

[0053] Preparation of microcapsules: add 0.2g sodium dodecylbenzenesulfonate to 300mL deionized water, stir for 20min; After stirring until dissolved, adjust the pH of the solution to 2.0 with sodium hydroxide and hydrochloric acid solution; add 5g of bisphenol A epoxy resin E-54 and 5g of trimethylolpropane triglycidyl ether to t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a preparation method of a high-impedance iron-silicon material and an integrated inductor containing the iron-silicon material. A preparation method of a high-impedance iron-silicon material comprises the following steps: selecting 400-500 mesh water atomized iron-silicon powder Carry out ball milling; add the powder after ball milling into the coating solution for insulation coating, and the coating solution is prepared by dissolving two or more of phosphoric acid, aluminum dihydrogen phosphate, chromic acid and potassium water glass in acetone Add the insulating coated powder into the secondary coating solution for secondary coating, and the secondary coating solution is prepared by dissolving one or more of silicone resin and liquid glue in acetone; The coated powder is sequentially granulated, dried and baked; after cooling to room temperature, auxiliary materials are added for stirring and sieving. An integrated inductance is manufactured by pressing and baking the above-mentioned high-impedance iron-silicon material and a coil. The invention effectively improves the particle shape of the powder, greatly improves the insulation between the powder and reduces the loss of the magnetic core.

Description

technical field [0001] The invention relates to the field of inductors, in particular to a method for preparing a high-impedance iron-silicon material and an integrated inductor containing the iron-silicon material. Background technique [0002] At present, many manufacturers will use alloy powder to make integrated inductors. The so-called integrated inductors are inductors formed by integrating the magnetic core and coil made of powder. Among them, the magnetic core is a composite soft magnetic material formed by mixing and pressing alloy powder and insulating medium. Since the surface of the alloy powder particles is evenly coated with a layer of insulating dielectric film, the resistivity of the magnetic core is high, so the eddy current loss Very low, suitable for higher frequency applications. The coil is made of enamelled copper wire, and the paint skin of the enameled wire on the coil is easy to be damaged when the one-piece inductor is die-casted, thus causing an i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/24H01F1/26H01F41/00H01F41/02H01F17/04H01F27/255B22F1/02B22F9/04
CPCH01F1/24H01F1/26H01F41/00H01F41/0246H01F17/04H01F27/255B22F9/04B22F2009/043B22F1/102
Inventor 郭宾丁卫坡
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products