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High magnetic permeability soft magnetic alloy powder, inductance part and preparation method thereof

A soft magnetic alloy, high permeability technology, used in transformer/inductor parts, electrical components, circuits, etc., can solve the problem that the magnetic permeability cannot reach a higher level, the hysteresis loss and eddy current loss are high, and problems such as large pressing pressure, to achieve the effect of fast diffusion, low power loss, and improved magnetic permeability

Active Publication Date: 2018-07-06
TIZ ADVANCED ALLOY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, soft magnetic materials mainly use FeSi, FeNi, FeCo, MPP, FeSiAL, soft ferrite, etc., but these widely used soft magnetic materials have their own shortcomings and limit their application range.
For example, FeSi type has relatively good magnetic isotropy and low power loss, but its magnetic permeability cannot reach a higher level
And FeNi type, FeCo type, MPP have higher magnetic permeability, but the lower saturation magnetic induction and expensive price limit their application
Soft magnetic ferrite has lower coercive force, but its hysteresis loss and eddy current loss are higher than other types of soft magnetic materials, and it requires larger pressing pressure and higher sintering temperature when making parts

Method used

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  • High magnetic permeability soft magnetic alloy powder, inductance part and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Add the high-purity materials of iron, nickel, silicon, phosphorus and boron into the intermediate frequency furnace and the intermediate frequency induction furnace, and carry out atmospheric smelting; in the present embodiment, the composition ratio of the soft magnetic alloy is: Fe=35-65 mass parts, Si=3.0-6.5 parts by mass, Ni=20-35 parts by mass, P=1.0-1.5 parts by mass, B=1.0-1.5 parts by mass.

[0039] (2) During the smelting process, control the smelting power to 300-350KW; the time and order of adding alloy elements, first add pure iron and pure nickel, and then add pure silicon during the melting process of raw materials. Add low-carbon iron phosphorus and low-carbon iron boron in turn.

[0040] (3) The molten metal is cooled and solidified into alloy powder after passing through the ultra-high pressure water-gas combined atomization process. A surfactant solution is added to the atomized water, and the surfactant is referred to as activity. Surfactant A...

Embodiment 2

[0048] The difference between this implementation and Example 1 is: the addition amount of surfactant A is different in the process of preparing Fe-Si-Ni-P-B soft magnetic alloy powder in the present embodiment, and the addition amount of this surfactant A in the present embodiment is 2wt‰ of the total amount of atomized water, that is, 2 per thousand.

[0049] After testing, the bulk density of the FeSiCr soft magnetic alloy powder is 2.95g / cm 3 , the tap density is 4.4g / cm 3 , the oxygen content is lower than 1500ppm. Under the pressing pressure of 600MPa, the green body density of the ring inductor is 6.33g / cm 3 , the magnetic permeability is 61, and the loss Ps is 108kW / m 3 , or even lower, reaching 100kW / m 3 Below, 100kW / m 3 Around, 105kW / m 3 about.

Embodiment 3

[0051] In this embodiment, the preparation method of sintered inductance and inductance is according to the conventional method, and the above-mentioned high magnetic permeability soft magnetic alloy powder is used as raw material to make integrally formed wire wound inductors, patch laminated inductors, magnetic core inductors, and filter inductors. , High-frequency transformers for LED circuits. The above-mentioned high magnetic permeability soft magnetic alloy powder may also be referred to as soft magnetic alloy powder.

[0052] In addition, microelectronic products, miniature inductors, etc. can also use the above-mentioned high magnetic permeability soft magnetic alloy powder as a raw material and prepare them according to conventional processes.

[0053] The applications in this embodiment can all meet the indicators in the above embodiments.

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Abstract

The invention discloses high-magnetoconductivity soft magnetic alloy powder. The alloy consists is prepared from the following components in parts by mass: 25.0 to 80.0 parts of Fe, 3.0 to 8.0 parts of Si, 15 to 55 parts of Ni, 1.0 to 7.0 parts of B and 1.0 to 5.0 parts of P. The invention further discloses an inductance piece prepared from the high-magnetoconductivity soft magnetic alloy powder, a preparation method of the high-magnetoconductivity soft magnetic alloy powder and a preparation method of the inductance piece. By the adoption of the preparation method disclosed by the invention, the soft magnetic alloy powder with various particle sizes can be prepared, and the soft magnetic alloy powder is high in magnetoconductivity, lower in power loss, higher in apparent density, high in tap density, lower in oxygen content, high in product pressing performance and high in magnetic ring density. Due to small oxygen content, few impurities, small carbon content, uniform alloy components and high sphericity degree, the high-magnetoconductivity soft magnetic alloy powder can be widely used as a raw material of a novel sintered inductor.

Description

technical field [0001] The invention relates to a soft magnetic alloy powder, in particular to the application and preparation method of the soft magnetic alloy powder. Background technique [0002] The existing soft magnetic alloy powders are widely used in military and civilian applications due to their small remanence and coercive force, especially the characteristics of easy magnetization and demagnetization, narrow hysteresis loop, and small hysteresis loss and eddy current loss. It is widely used in the electronic power industry. At present, with the emergence of smart devices and new electric vehicles, soft magnetic materials are endowed with more excellent electromagnetic properties in the application fields of signal transmission, filtering, anti-interference, and micro-motors. , For example: higher magnetic permeability, lower power loss, longer service life, lower cost price, etc. [0003] At present, soft magnetic materials mainly use FeSi, FeNi, FeCo, MPP, FeSi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/147H01F27/255B22F9/08
CPCB22F9/082B22F2009/0824B22F2009/0844B22F2009/0892H01F1/14766H01F27/255
Inventor 唐明强赵放王冲
Owner TIZ ADVANCED ALLOY TECH CO LTD
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