Composite powder for magnetic powder core and preparation process for magnetic powder core

A composite powder and magnetic powder core technology, which is applied in the direction of magnetic core/yoke, inductor/transformer/magnet manufacturing, magnetic materials, etc., can solve the problem that the required characteristics of magnetic powder core are not ideal

Inactive Publication Date: 2006-06-14
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The purpose of the present invention is to solve the problem that other required characteristics of the magnetic powder core are not ideal when the performance of the existing metal magnetic powder core is prepared by using a single powder, and to provide a composite material for the preparation of magnetic powder cores by mixing two or more metal alloy powders. Preparation method of powder and magnetic powder core thereof, preparation of magnetic powder core powder and magnetic powder core with comprehensive and comprehensive demand characteristics

Method used

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  • Composite powder for magnetic powder core and preparation process for magnetic powder core
  • Composite powder for magnetic powder core and preparation process for magnetic powder core
  • Composite powder for magnetic powder core and preparation process for magnetic powder core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] This embodiment adopts water atomization method to prepare amorphous Fe 69 Ni 5 Al 4 sn 2 P 10 C 2 B 4 Si 4 Alloy powder and MPP powder. Among them, the pre-annealing process of MPP powder is 650 ° C × 60 minutes; Fe 69 Ni 5 Al 4 sn2 P 10 C 2 B 4 Si 4 The pre-annealing process of the powder is 450°C×60 minutes, and the annealing process adopts a vacuum atmosphere. The negative 300-mesh powder was obtained by sieving respectively, and mixed to prepare composite powder. The mixing ratio is shown in Table 1.

[0091] serial number

The mixing ratio

DC Bias Characteristics

Amorphous

powder

MPP

powder

Specific permeability

(50Oe)

Raise the ratio

(50Oe)

Specific permeability

(100Oe)

Raise the ratio

(100Oe)

1

25％

75％

63.9％

14.1％

37.0％

36.5％

2

50％

50％

85.4％

52.5％

70.4％

159.8％

Contrast ...

Embodiment 2

[0095] This embodiment adopts water atomization method to prepare amorphous Fe 69 Ni 5 Al 4 sn 2 P 10 C 2 B 4 Si 4 alloy powder. Nanocrystalline Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 The preparation method of the alloy powder includes: 1. preparing an amorphous alloy strip by a single-roller quick quenching method; 2. annealing isothermally at 550° C. for 30 minutes in a nitrogen atmosphere; 3. obtaining nanocrystalline powder by ball milling with a planetary ball mill. where Fe 69 Ni 5 Al 4 sn 2 P 10 C 2 B 4 Si 4 The pre-annealing process of the powder is 450°C×60 minutes, and the annealing process adopts a vacuum atmosphere; the annealing process of the nanocrystalline powder is 550°C×30 minutes, and the annealing atmosphere is a nitrogen atmosphere. Sieve negative 400 mesh amorphous Fe 69 Ni 5 Al 4 sn 2 P 10 C 2 B 4 Si 4 and minus 100 mesh to plus 200 mesh nanocrystalline powder, and mixed to prepare composite powder, the mixing ratio is shown in Table 2...

Embodiment 3

[0100] This embodiment adopts water atomization method to prepare amorphous Fe 69 Ni 5 Al 4 sn 2 P 10 C 2 B 4 Si 4 Alloy powder, the sendust powder is prepared by crushing method. where Fe 69 Ni 5 Al 4 sn 2 P 10 C 2 B 4 Si 4 The pre-annealing process of the powder is 450°C×60 minutes, and the annealing process adopts a vacuum atmosphere; the annealing process of the sendust powder is 600°C×30 minutes, and the annealing atmosphere is a hydrogen atmosphere. Sieve negative 400 mesh amorphous Fe 69 Ni 5 Al 4 sn 2 P 10 C 2 B 4 Si 4 powder and sendust powder, and mixed to prepare composite powder, the mixing ratio is shown in Table 3. The preparation method of the composite magnetic powder core is the same as that of Example 2.

[0101] For the quality factor of the composite magnetic powder core and the quality factor of the comparative sendust powder core, see image 3 , it can be seen that the addition of amorphous powder can significantly improve the qua...

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Abstract

The invention provides a composite powder for magnetic powder core and the magnetic powder core preparing method thereof. The composite powder is mixed of powder A and powder B in the weight percents of 50-95wtúÑ and 50-95wtúÑ, respectively, where the powder A is one of the iron powder, iron-silicon powder, iron-silicon-aluminum powder, iron-base nano crystal powder, iron-base noncrystalline powder, iron-nickel powder, and iron-nickel-molybdenum powder; and the powder B has different demanded properties from the powder A and comprises at least one of the iron powder, iron-silicon powder, iron-silicon-aluminum powder, iron-base nano crystal powder, iron-base noncrystalline powder, iron-nickel powder, and iron-nickel-molybdenum powder. And the composite magnetic powder core preparing method anneals the powder A and powder B, respectively, so as to make both of them be in an excellent magnetic performance state, then mixes them uniformly, makes insulates and binding treatments, and finally makes press-forming and annealing treatments, thus obtaining the composite powder and the magnetic powder core thereof with synthetic and complete demanded properties.

Description

technical field [0001] The invention belongs to the field of functional materials and relates to a composite powder for magnetic powder cores and a preparation method for the magnetic powder cores. Background technique [0002] As the existing technology, the current types of metal magnetic powder cores mainly include iron powder cores, iron silicon powder cores, Sendust powder cores, Hi-Flux powder cores, MPP powder cores, and amorphous magnetic powder cores and nanocrystalline magnetic powder cores developed in recent years. These magnetic powder cores have their own characteristics, and their application fields are also different. [0003] As prior art documents related to the application of the present invention include: [0004] Patent Document 1: Chinese Invention Patent CN1373481A [0005] Patent Document 2: Chinese Invention Patent CN1487536A [0006] Patent Document 3: US Invention Patent US6,827,557 [0007] Patent Document 4: US Patent of Invention US6,594,157...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F3/08B22F1/00C21D1/26H01F1/047H01F1/06H01F1/09H01F1/147H01F1/20H01F41/02
Inventor 陆曹卫卢志超李德仁郭峰周少雄
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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