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Compound soft magnetic material with operational performances of high-frequency and large power and process for preparing same

A technology of composite soft magnetic and soft magnetic composite materials, which is applied in the field of soft magnetic materials and its preparation, can solve the problems of unsuitable use of Somaloy series, low insulation performance of the cladding layer, complicated cladding process, etc., and achieve environmental friendliness Effects of industrial production, suitable for industrial production, and rich sources of raw materials

Inactive Publication Date: 2010-04-14
WUXI RES INST OF APPLIED TECH TSINGHUA UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

but The coating process adopted by the company is relatively complicated, and the waste liquid from the phosphating treatment of iron powder has potential pollution to the environment. In addition, Fe 3 The insulation performance of the P cladding layer is not high, and the surface is easily oxidized, so the Somaloy series is not suitable for use under higher frequency and higher temperature conditions

Method used

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  • Compound soft magnetic material with operational performances of high-frequency and large power and process for preparing same
  • Compound soft magnetic material with operational performances of high-frequency and large power and process for preparing same
  • Compound soft magnetic material with operational performances of high-frequency and large power and process for preparing same

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Embodiment 1

[0035] Composite soft magnetic material with high frequency and high power use characteristics, its composition is Fe / SiO 2 Core-shell composite structure, in which the particle size of iron powder is 107μm, SiO 2 Uniformly coated on the surface of iron powder particles, SiO 2 The thickness of the cladding layer is 200nm, SiO2 The mass fraction of Fe is 4.97%, and the mass fraction of Fe is 95.03%.

[0036] A method for preparing a composite soft magnetic material with high-frequency and high-power usage characteristics, comprising the following steps:

[0037] 1. Take 50 g of commercially available high-purity iron powder with a particle size of 107 μm and a mass fraction of Fe element greater than 99.8%, and wash it twice with analytically pure acetone and analytically pure ethanol;

[0038] 2. Put the cleaned iron powder into a container containing analytical pure ethanol, 25% ammonia and analytical pure oleic acid and stir to form the iron powder mixture. The mass ratio ...

Embodiment 2

[0049] Composite soft magnetic material with high frequency and high power use characteristics, its composition is Fe / SiO 2 Core-shell composite structure, in which the particle size of iron powder is 121μm, SiO 2 Uniformly coated on the surface of iron powder particles, SiO 2 The thickness of the cladding layer is 152nm, SiO 2 The mass fraction of Fe is 2.71%, and the mass fraction of Fe is 97.29%.

[0050] A method for preparing a composite soft magnetic material with high-frequency and high-power usage characteristics, comprising the following steps:

[0051] 1. Take 50 g of commercially available high-purity iron powder with a particle size of 121 μm and a mass fraction of Fe element greater than 99.8%, and wash it once with analytically pure acetone and analytically pure ethanol;

[0052] 2. Put the cleaned iron powder into a container containing analytical pure ethanol, 25% ammonia and analytical pure oleic acid and stir to form the iron powder mixture. The mass ratio...

Embodiment 3

[0059] Composite soft magnetic material with high frequency and high power use characteristics, its composition is Fe / SiO 2 Core-shell composite structure, in which the particle size of iron powder is 38μm, SiO 2 Uniformly coated on the surface of iron powder particles, SiO 2 The thickness of the cladding layer is 300nm, SiO 2 The mass fraction of Fe is 10.12%, and the mass fraction of Fe is 89.88%.

[0060] A method for preparing a composite soft magnetic material with high-frequency and high-power usage characteristics, comprising the following steps:

[0061] 1. Take 50 g of commercially available high-purity iron powder with a particle size of 38 μm and a mass fraction of Fe element greater than 99.8%, and wash it twice with analytically pure acetone and analytically pure ethanol;

[0062] 2. Put the cleaned iron powder into a container containing analytical pure ethanol, 25% ammonia and analytical pure oleic acid and stir to form the iron powder mixture. The mass ratio...

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Abstract

Disclosed is a compound soft magnetic material with operational performances of high-frequency and large power and process for preparing same. By adopting the technology of controlling the hydrolytic decomposition and sedimentation of ethyl orthosilicate under room temperature, the surfaces of iron powder particles with large grain diameters are evenly coated with amorphous silicon dioxide shells, thus Fe / SiO2 core-shell composite soft magnetic powder which is completely insulated with controllable shell thickness between 100 and 300 nanometers is manufactured, wherein SiO2 is 2-11 percent by mass, and Fe element is 89-98 percent by mass. The compound soft magnetic material with operational performances of high-frequency and large power and the process for preparing same are rich in raw material sources, simple in technological process, environment-friendly and suitable for industrialized production.

Description

technical field [0001] The invention relates to a soft magnetic material and a preparation method thereof, in particular to a composite soft magnetic material with high-frequency and high-power usage characteristics and a preparation method thereof. Background technique [0002] Soft magnetic composite materials with high-frequency and high-power usage characteristics are an important research direction in the field of magnetic materials. This material can be used to prepare high-performance electromagnetic components used in specific environments, such as high-temperature engines and generator rotors, and has potential applications in the rapidly developing aerospace, nuclear industry, and civilian high-tech fields such as large aircraft and hybrid vehicles. prospects and great economic benefits. Traditional metal soft magnetic materials and soft ferrite are far from meeting the requirements for use. Therefore, the research and development of new soft magnetic composite m...

Claims

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Application Information

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IPC IPC(8): H01F1/147H01F1/20B22F1/02B22F3/02
Inventor 杨白于荣海
Owner WUXI RES INST OF APPLIED TECH TSINGHUA UNIV
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