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Magnetic iron powder composition and preparation method thereof, magnetic core and inductor

A technology of magnetic iron and composition, applied in the direction of magnetic objects, magnetic materials, magnetic core/yoke, etc., can solve the problems of fast aging speed, increased core loss and temperature rise, and poor insulation properties, etc., to achieve anti-aging Effects of core loss, improvement of insulation characteristics, and reduction of eddy current loss

Inactive Publication Date: 2016-01-27
郑长茂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adhesive is made of organic materials, so it will face the problem of aging. Aging will cause the insulation properties to deteriorate, which will increase the core loss and temperature rise, and eventually cause the inductor to burn out and fail.
The magnetic iron powder in the existing soft magnetic material is made of epoxy resin, polyester resin or silicon resin as the adhesive material, which often has the problems of poor temperature resistance and fast aging speed

Method used

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  • Magnetic iron powder composition and preparation method thereof, magnetic core and inductor
  • Magnetic iron powder composition and preparation method thereof, magnetic core and inductor
  • Magnetic iron powder composition and preparation method thereof, magnetic core and inductor

Examples

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Comparison scheme
Effect test

Embodiment 1

[0041] The magnetic iron powder composition of the present embodiment 1 comprises: reduced iron powder, iron phosphate film formed on the surface of reduced iron powder and phenolic resin coated on iron phosphate; wherein: iron phosphate accounts for the mass percent of reduced iron powder is 0.15%; the mass percentage of phenolic resin in the reduced iron powder is 1%.

[0042] The preparation method of the magnetic iron powder composition of the present embodiment 1 is as follows:

[0043] (a) First, add 1g of phosphoric acid and 1g of phosphoric acid accelerator into 40g of alcohol and stir evenly, add the solution into 1Kg of reduced iron powder (Fe>99%) and stir for 15 minutes, then bake and stir at 130°C for 120 minutes to obtain powder material.

[0044] (b) Add 10g of phenolic resin to 60g of alcohol and stir evenly, add the solution to the powder prepared in the previous step and stir for 10 minutes, pass through a 24-mesh sieve when the powder is half dry, and bake ...

Embodiment 2

[0052] This embodiment 2 provides a magnetic iron powder composition, which includes: carbonyl iron powder, an iron phosphate film formed on the surface of the carbonyl iron powder, and a phenolic resin coated on the iron phosphate; wherein: iron phosphate accounts for the carbonyl iron powder The mass percentage is 4.6%; the mass percentage of the phenolic resin in the carbonyl iron powder is 4%.

[0053] The preparation method of the magnetic iron powder composition of present embodiment 2 is as follows:

[0054] (a) Add 30g of phosphoric acid and 1g of phosphoric acid accelerator to 40g of alcohol and stir evenly, then add the solution to 1Kg of carbonyl iron powder and stir for 15 minutes, then bake and stir at 130°C for 120 minutes to obtain powder.

[0055] (b) Add 40g of phenolic resin to 60g of alcohol and stir evenly, add the solution to the powder prepared in the previous step and stir for 10 minutes, pass through a 24-mesh sieve when the powder is half dry, and bake...

Embodiment 3

[0063] This embodiment 3 provides a magnetic iron powder composition, which includes: carbonyl iron powder, an iron phosphate film formed on the surface of the carbonyl iron powder, and a phenolic resin coated on the iron phosphate; wherein: iron phosphate accounts for the carbonyl iron powder The mass percentage is 0.46%; the mass percentage of the phenolic resin in the carbonyl iron powder is 3%.

[0064] The preparation method of the magnetic iron powder composition of present embodiment 3 is as follows:

[0065] (a) First, add 3 g of phosphoric acid and 1 g of phosphoric acid accelerator into 40 g of alcohol and stir evenly, then add the solution into 1 kg of carbonyl iron powder and stir for 15 minutes, then bake and stir at 130° C. for 120 minutes to obtain powder.

[0066] (b) Add 30g of phenolic resin to 60g of alcohol and stir evenly, add the solution to the powder prepared in the previous step and stir for 10 minutes, pass through a 24-mesh sieve when the powder is h...

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Abstract

The invention relates to a magnetic iron powder composition and a preparation method thereof. The magnetic iron powder composition comprises magnetic iron powder, iron phosphate and phenolic resin, wherein the iron phosphate and the phenolic resin are formed on the surface of the magnetic iron powder; and the iron phosphate accounts for 0.06%-9% of the magnetic iron powder by mass; and the phenolic resin accounts for 0.5-10% of the magnetic iron powder by mass. The invention further relates to a magnetic core and an inductor prepared from the magnetic iron powder composition. The magnetic core provided by the invention has the characteristics of being temperature-resistant, ageing-resistant, low in magnetic core loss and the like.

Description

technical field [0001] The invention relates to the processing of metal powder, in particular to magnetic iron powder, its preparation method and its application. Background technique [0002] Existing soft magnetic materials are mainly divided into four categories: Ferrite, Amorphous, Alloy powder and Iron Powder. Among them, ferrite, amorphous materials and alloy materials are annealed at a high temperature above 700°C to meet the strength and characteristic requirements, so there will be no aging problem. However, ferrite, amorphous materials, and alloy materials are not suitable for the production of integrally formed products. The integrally formed products contain enameled coils, and the maximum process temperature cannot exceed 220°C, otherwise the enameled coils will burn and lose their insulation function. If the alloy material is selected as the material, it must be sintered and hardened by adding an adhesive. [0003] However, the magnetic iron powder needs to b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/047B22F1/02B22F3/02H01F27/255H01F3/08
Inventor 郑长茂
Owner 郑长茂
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