High magnetic permeability soft magnetic powder for inductors and production method thereof

A soft magnetic powder, high magnetic permeability technology, applied in circuits, magnetic materials, electrical components, etc., can solve the problems of large magnetic permeability loss of soft magnetic powder, unfavorable electronic components production, etc., to avoid large losses, good Anti-rust, quality improvement effect

Inactive Publication Date: 2019-03-01
HEFEI ECRIEE TAMURA ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the magnetic permeability loss of the soft magnetic p

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] Example 1

[0025] The method for producing soft magnetic powder for inductors with high magnetic permeability described in this embodiment includes the following steps:

[0026] (1) Weigh 40g sodium hydroxide solution with a concentration of 550g / L, 30g sodium nitrite solution with a concentration of 150g / L, 30g sodium nitrate solution with a concentration of 100g / L, and mix the above three solutions to obtain a blue liquid , Weigh 1000g of carbonyl iron powder, mix the carbonyl iron powder and the bluing liquid in a mixing tank, and heat while stirring at a stirring speed of 40 rad / min and a heating temperature of 110°C. After the water evaporates, the stirring and heating are stopped, and the mixture is cooled to room temperature to obtain 1008 g of the passivation powder coated with the bluing film.

[0027] In the above operation, over-temperature protection measures are also provided during heating, and the temperature of over-temperature protection is 120°C.

[0028] (2...

Example Embodiment

[0039] Example 2

[0040] The method for producing soft magnetic powder for inductors with high magnetic permeability described in this embodiment includes the following steps:

[0041] (1) Weigh 18.75g sodium hydroxide solution with a concentration of 700g / L, 15.62g sodium nitrite solution with a concentration of 250g / L, 15.63g sodium nitrate solution with a concentration of 150g / L, and mix the above three solutions to obtain The bluing liquid, then weigh 1000g of iron-silicon-chromium alloy powder, mix the iron-silicon-chromium alloy and the bluing liquid in a mixing tank, and heat while stirring at a mixing speed of 45rad / min and a heating temperature of 110°C. After the water evaporates, the stirring and heating are stopped, and the mixture is cooled to room temperature to obtain 1005 g of the passivation powder coated with the bluish film.

[0042] In the above operation, over-temperature protection measures are also provided during heating, and the temperature of over-temperat...

Example Embodiment

[0053] Example 3

[0054] The method for producing soft magnetic powder for inductors with high magnetic permeability described in this embodiment includes the following steps:

[0055] (1) Weigh 27.59g of sodium hydroxide solution with a concentration of 600g / L, 27.59g of sodium nitrite solution with a concentration of 200g / L, and 24.83g of sodium nitrate solution with a concentration of 125g / L, and mix the above three solutions to obtain The bluing liquid, weigh 500g of Fe-Si-Cr alloy powder and 500g of carbonyl iron powder, mix the powder and bluing liquid in a mixing tank, and heat while stirring at a mixing speed of 50rad / min and a heating temperature of 110°C. After the water evaporates, the stirring and heating are stopped, and the mixture is cooled to room temperature to obtain 1006 g of passivation powder coated with a bluish film.

[0056] In the above operation, over-temperature protection measures are also provided during heating, and the temperature of over-temperature ...

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Abstract

The invention discloses a production method of high magnetic permeability soft magnetic powder for inductors. The method comprises the following steps of: (1) uniformly mixing soft magnetic metal powder with blueing water in a heating state and obtaining blueing film-coated passivation powder after the water is evaporated to dryness, wherein the soft magnetic metal powder is carbonyl iron powder and/or iron silicon chromium alloy and the blueing liquid is obtained by mixing sodium hydroxide solution, sodium nitrite solution and sodium nitrate solution; (2) weighing a glue material according tothe ratio and dissolving the glue material in acetone to obtain an adhesive; (3) mixing the passivation powder with the adhesive, pumping air while stirring until the liquid is completely evaporatedand carrying out extrusion granulation; and (4) baking and drying the obtained granules in an oven and screening. The invention also discloses the high magnetic permeability soft magnetic powder for the inductors, which is prepared by adopting the method. The method disclosed by the invention has the advantages that under the circumstance of guaranteeing that the powder material has good rust resistance and insulativity, the magnetic permeability is avoided being lost by a large margin and the quality of the powder material is improved.

Description

technical field [0001] The invention belongs to the technical field of magnetic functional materials, and in particular relates to a method for producing soft magnetic powder for inductance with high magnetic permeability and the soft magnetic powder. Background technique [0002] Magnetic materials are widely used in electronic and electrical products, and are one of the foundations of the material industry. They have special functions such as energy conversion and storage. At present, the soft magnetic composite material obtained by coating the insulating film on the surface of ferromagnetic particles has a series of unique properties compared with the traditional laminated rigid magnetic core, such as three-dimensional isotropic magnetic properties, extremely low eddy current loss, flexible core structure design, etc. It is precisely because of these characteristics that soft magnetic composite materials have broad application prospects. [0003] The coating of insulati...

Claims

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Application Information

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IPC IPC(8): H01F1/147B22F1/00
CPCH01F1/14766B22F1/103B22F1/102B22F1/145
Inventor 李伟健李媛媛方超刘国安柳军涛胡锋张磊
Owner HEFEI ECRIEE TAMURA ELECTRIC
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