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Amorphous soft magnetic composite magnetic powder core and preparation method thereof

A soft magnetic composite and amorphous technology, applied in the direction of magnetic materials, magnetic objects, metal processing equipment, etc., can solve the problems of poor magnetic properties and thermal stability of magnetic powder cores, and achieve the effect of excellent magnetic properties and good calenderability

Active Publication Date: 2016-12-07
张听
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] For this reason, what the present invention is to solve is the technical problem of poor magnetic properties and thermal stability of the magnetic powder cores made in the prior art, and provides a high temperature resistant, amorphous soft magnetic composite magnetic powder core with excellent magnetic properties and its Preparation

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  • Amorphous soft magnetic composite magnetic powder core and preparation method thereof
  • Amorphous soft magnetic composite magnetic powder core and preparation method thereof

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Effect test

Embodiment 1

[0064] This embodiment provides an amorphous soft magnetic composite magnetic powder core and its preparation method, and the corresponding preparation method includes the following steps:

[0065] S1, preparation of amorphous alloy powder:

[0066] 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;

[0067] 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;

[0068] 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 round the edges ...

Embodiment 2

[0075] This embodiment provides an amorphous soft magnetic composite magnetic powder core and its preparation method, and the corresponding preparation method includes the following steps:

[0076] S1, preparation of amorphous alloy powder:

[0077] 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;

[0078] 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;

[0079] 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 the edges and...

Embodiment 3

[0086] This embodiment provides an amorphous soft magnetic composite magnetic powder core and its preparation method, and the corresponding preparation method includes the following steps:

[0087] S1, preparation of amorphous alloy powder:

[0088] 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;

[0089] 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;

[0090] 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 the edges and co...

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Abstract

The invention belongs to the field of a metal-based soft magnetic composite material. A preparation method comprises the following steps of preparing amorphous alloy powder from an amorphous alloy thin strip; screening and compounding the amorphous alloy powder to obtain a first product; performing passivation and coupling processing on the first product to obtain a second product; mixing and stirring the second product and a ceramic precursor polymer solution to obtain composite amorphous powder; and performing formation, thermal processing and insulation layer coating on the composite amorphous powder to obtain amorphous soft magnetic composite magnetic powder. By adopting a ceramic precursor polymer as an insulation binding agent, the step of adding insulation agent powder is omitted, the problems of unstable magnetic conductivity and poor thermal stability during traditional preparation of the magnetic powder core by crashing the amorphous thin strip are solved, the production cost is reduced, and the amorphous soft magnetic composite magnetic powder can be applied to a certain electronic device with application requirements for high frequency and low loss.

Description

technical field [0001] The invention belongs to the field of metal matrix soft magnetic composite materials, and in particular relates to an amorphous soft magnetic composite magnetic powder core 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 powderin...

Claims

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Application Information

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IPC IPC(8): H01F1/153H01F1/22B22F1/00
CPCH01F1/15325H01F1/15375B22F1/10
Inventor 张听祝万乾坤
Owner 张听
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