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Iron-silicon-aluminum-nickel soft magnetic powder core with effective magnetic permeability of 125 for boost inductor and preparation method thereof

An iron-silicon-aluminum-nickel and magnetic permeability technology, applied in the field of iron-silicon-aluminum-nickel soft magnetic powder core and its preparation, can solve the problems of low DC superposition performance and high loss level of iron-silicon powder core, achieve easy operation and control, improve performance, the effect of avoiding environmental hazards

Inactive Publication Date: 2020-02-28
SINOSTEEL NANJING NEW MATERIALS RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development trend of high-power and high-frequency electronic power devices, the DC superposition performance of traditional sendust powder cores is low, while the loss level of iron-silicon powder cores is high, which cannot further meet the development requirements of future electronic devices. Therefore, It is necessary to further develop powder core products with excellent soft magnetic properties

Method used

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  • Iron-silicon-aluminum-nickel soft magnetic powder core with effective magnetic permeability of 125 for boost inductor and preparation method thereof
  • Iron-silicon-aluminum-nickel soft magnetic powder core with effective magnetic permeability of 125 for boost inductor and preparation method thereof
  • Iron-silicon-aluminum-nickel soft magnetic powder core with effective magnetic permeability of 125 for boost inductor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Select the commercially available alloy with the particle size of -200 mesh as Si 4.0%, Al 3.5%, Ni 2.0% by mass percentage respectively, and the remainder is Fe-susilicate-nickel magnetic powder 1000.0g; then, add 0.3g of epoxy resin, 1.0g of SiO 2Powder, 10.0g of acetone and 90.0g of water were stirred at room temperature for 20 minutes to form a uniform mixed slurry; then, the mixed slurry was heated to 100°C and kept stirring for 35 minutes. The Sensitive Aluminum Nickel insulating powder is sieved with a 100-mesh sieve; 3.0 g of polyamide resin binder and 4.0 g of talcum powder release agent are added to the sieved powder, and mixed evenly to obtain The magnetic powder; the uniformly mixed powder is pressed into a powder core blank with a pressing pressure of about 2300MPa, wherein the powder core blank is an annular powder core with an outer diameter of 33.02mm x an inner diameter of 19.94mm x a height of 10.67mm; nitrogen is used as a protective Gas, heat the pr...

Embodiment 2

[0050] The raw powder particle size is selected as -200 purpose commercially available alloy composition mass percent is Si 4.0%, Al 3.5%, Ni 2.0% respectively, the remainder is the sendust magnetic powder 1000.0g of Fe; Then, add 0.8g epoxy resin, 0.5g of SiO 2 Powder, 10.0g of acetone and 90.0g of water were stirred at room temperature for 20 minutes to form a uniform mixed slurry; then, the mixed slurry was heated to 140°C and kept stirring for 15 minutes. The Sensilicon Alnickel insulating powder was sieved with a 100-mesh sieve; 3.0g of phenolic resin binder and 4.0g of mica powder release agent were added to the sieved powder, and mixed evenly, using a pressing pressure of about Press the uniformly mixed powder into a powder core blank at 2500MPa, wherein the powder core blank is an annular powder core with an outer diameter of 33.02mm x an inner diameter of 19.94mm x a height of 10.67mm; using nitrogen as a protective gas, the pressed powder The core blank is kept at 8...

Embodiment 3

[0058] Select 1000.0g of sendust magnetic powder whose grain size is -200 mesh and the mass percentages of commercially available alloy components are Si 4%, Al 4.5%, Ni 1.5%, and the rest is Fe; then, add 0.5g of epoxy resin , 0.7g of SiO 2 Powder, 10.0g of acetone and 90.0g of water were stirred at room temperature for 20 minutes to form a uniform mixed slurry; then, the mixed slurry was heated to 120°C and kept stirring for 25 minutes. The SensiAlNi insulating powder is sieved with a 100-mesh sieve; 3.0 g of silicone resin binder and 4.0 g of zinc stearate release agent are added to the sieved powder, and mixed uniformly, The magnetic powder to be formed is obtained; the uniformly mixed powder is pressed into a powder core blank with a pressing pressure of about 2800MPa, wherein the powder core blank is an annular powder core with an outer diameter of 33.02mm×an inner diameter of 19.94mm×a height of 10.67mm; As a protective gas, heat the pressed powder core blank at 900°C ...

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Abstract

The invention belongs to the technical field of soft magnetic materials, and especially relates to an iron-silicon-aluminum-nickel soft magnetic powder core with effective magnetic permeability of 125for a boost inductor and a preparation method thereof. The iron-silicon-aluminum-nickel soft magnetic powder core with the effective magnetic permeability of 125 for the boost inductor is prepared byadopting iron-silicon-aluminum-nickel magnetic powders with the particle size smaller than 200 meshes, and carrying out insulation coating treatment on iron-silicon-aluminum-nickel powder particles through SiO2 powders. The preparation process is simple and easy to operate; the prepared iron-silicon-aluminum-nickel soft magnetic powder core has excellent direct-current bias performance and frequency stability; the direct-current bias performance of the powder core under the condition of 100Oe is higher than 34%; and the volume loss Pcv under the conditions of 50kHz and 100mT is lower than 340mW / cm<3>.

Description

technical field [0001] The invention belongs to the technical field of soft magnetic materials, and in particular relates to a FeSiAlNi soft magnetic powder core with an effective permeability of 125 for a boost inductor and a preparation method thereof. Background technique [0002] Metal soft magnetic powder core has high saturation magnetic induction, high effective permeability, low loss, good DC bias performance and frequency stability. The preparation process of metal magnetic powder cores usually adopts the method of compression molding, which can press powder materials into products of different shapes to meet the needs of different scenarios. The distributed air gap inside the metal soft magnetic powder core and the insulating layer formed on the surface of the magnetic powder through the insulating coating process can well reduce the material loss of the magnetic powder core, and the performance parameters of the product are easy to control, and the product perform...

Claims

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Application Information

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IPC IPC(8): H01F1/147H01F1/24H01F1/26H01F41/02
CPCH01F1/14791H01F1/24H01F1/26H01F41/0246
Inventor 骆艳华裴晓东王凡鲍维东徐春宇曹浩
Owner SINOSTEEL NANJING NEW MATERIALS RES INST CO LTD
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