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A kind of composite amorphous powder precursor for magnetic powder core and preparation method thereof

An amorphous powder and precursor technology, which is applied in the fields of magnetic objects, inductor/transformer/magnet manufacturing, magnetic materials, etc., can solve the problems of poor thermal stability of magnetic powder cores, and achieve the effect of excellent magnetic properties and good calendering.

Active Publication Date: 2019-02-15
张听
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] For this reason, what the present invention intends to solve is the technical problem of poor thermal stability of the magnetic powder cores produced by the amorphous powder precursors used in the prior art, and provides a composite non-crystalline powder that can effectively improve the thermal stability and magnetic properties of the magnetic powder cores. Crystal powder precursor and preparation method thereof

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  • A kind of composite amorphous powder precursor for magnetic powder core and preparation method thereof

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Embodiment 1

[0057] This embodiment provides a composite amorphous powder precursor for magnetic powder cores and a preparation method thereof, and the corresponding preparation method includes the following steps:

[0058] S1, preparation of amorphous alloy powder:

[0059] S11, the thickness is 18μm, the bandwidth is 10mm, and the composition is Fe 80 Si 9 B 11 The iron-based amorphous alloy thin strip is crushed into 50-200-mesh fragments by a mechanical crusher;

[0060] S12. Put 50-mesh to 200-mesh fragments in a nitrogen-protected atmosphere rotary furnace, and heat-treat at 300°C for 1 hour. During the heat treatment, control the rotation rate of the atmosphere rotary furnace to 5r / min and the atmosphere pressure to 0.1MPa. Stop and turn the atmosphere rotary furnace so that the amorphous fragments are evenly heated;

[0061] S13. Put the heat-treated fragments into an airflow grinder, control the output power of the airflow grinder to 35KW, grind for 50 minutes, and further rou...

Embodiment 2

[0066] This embodiment provides a composite amorphous powder precursor for magnetic powder cores and a preparation method thereof, and the corresponding preparation method includes the following steps:

[0067] S1, preparation of amorphous alloy powder:

[0068] S11, the thickness is 20μm, the bandwidth is 20mm, and the composition is Fe 78 Si 9 B 13 The iron-based amorphous alloy thin strip is crushed into 50-200-mesh fragments by a mechanical crusher;

[0069] S12. Put 50-mesh to 200-mesh fragments in an atmosphere rotary furnace protected by argon, and heat-treat at 300°C for 1 hour. During the heat treatment, control the rotation rate of the atmosphere rotary furnace to 10r / min and the atmosphere pressure to 0.2MPa. Stop and turn the atmosphere rotary furnace so that the amorphous fragments are evenly heated;

[0070] S13. Put the heat-treated fragments into an airflow grinder, control the output power of the airflow grinder to 70KW, grind for 50min, and further round ...

Embodiment 3

[0075] This embodiment provides a composite amorphous powder precursor for magnetic powder cores and a preparation method thereof, and the corresponding preparation method includes the following steps:

[0076] S1, the preparation of amorphous alloy powder:

[0077] S11, the thickness is 25μm, the bandwidth is 30mm, and the composition is Fe 80 Si 9 B 11 The iron-based amorphous alloy thin strip is crushed into 50-200-mesh fragments by a mechanical crusher;

[0078] S12. Put the 50-mesh to 200-mesh fragments in a nitrogen-protected atmosphere rotary furnace, and heat-treat at 280°C for 1h. During the heat treatment, control the rotation rate of the atmosphere rotary furnace to 20r / min, and the atmosphere pressure to 0.3MPa. Turn over the atmosphere rotary furnace to make the amorphous fragments heated evenly;

[0079] S13. Put the heat-treated fragments into an airflow grinder, control the output power of the airflow grinder to 50KW, grind for 90 minutes, and further round...

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Abstract

The invention belongs to the field of metal-based soft magnetic composite and discloses a composite amorphous powder precursor used for a magnetic powder core and a preparation method of the composite amorphous powder precursor. The preparation method includes the steps of preparing an amorphous alloy ribbon into amorphous alloy powder; subjecting the amorphous alloy powder to screening and compounding to obtain a first product; subjecting the first product to passivation and coupling to obtain a second product; mixing the second product with a ceramic precursor polymer solution with stirring to obtain the composite amorphous powder precursor. The composite amorphous powder precursor and the preparation method has the advantages that by using ceramic precursor polymers as an insulating agent and a binding agent, the step of adding insulating powder is omitted, the problems of poor thermostabilization and poor magnetic performance of a magnetic powder core prepared from an amorphous powder precursor which is obtained by means of subjecting an amorphous ribbon pieces to thermal treating, crushing, screening, compounding, passivating and coupling are solved, production cost is decreased, and the composite amorphous powder precursor can be applied to an electron device requiring high frequency and low consumption.

Description

technical field [0001] The invention belongs to the field of metal-based soft magnetic composite materials, and in particular relates to a composite amorphous powder precursor for magnetic powder cores and a preparation method thereof. Background technique [0002] Amorphous alloy is a soft magnetic alloy material with excellent performance. It has the advantages of high resistance, high saturation magnetic flux density, high magnetic permeability, low loss, and low price. The amorphous alloy thin strip prepared by rapid quenching and quenching process Has been widely used in power frequency transformer core. However, as the operating frequency increases, the eddy current loss of the amorphous alloy thin strip will also increase. Therefore, it has become an urgent need in the field of soft magnetic alloys to develop amorphous alloy magnetic powder cores at medium and high frequencies by referring to powder metallurgy and composite material forming processes. [0003] By po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/153H01F41/00H01F41/02
CPCH01F1/15308H01F1/15341H01F1/1535H01F1/15375H01F41/00H01F41/0246
Inventor 张听祝万乾坤
Owner 张听
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