Magnetic field oriented flaky soft magnetic composite material and preparation method thereof

A kind of soft magnetic composite material and flake technology, which is applied in the direction of inorganic material magnetism, can solve the problems of low and unsatisfactory magnetic permeability, and achieve the effect of improving magnetic permeability and meeting miniaturization

Inactive Publication Date: 2009-12-16
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Chinese invention patent applications 200710157181.9, 200710177339.9, 200710101937.8 and 200710160245.0 disclose a variety of materials with high magnetic permeability that can effectively shield electromagnetic waves. The material is not ideal in actual use, especially its low magnetic permeability near 1-2GHz

Method used

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  • Magnetic field oriented flaky soft magnetic composite material and preparation method thereof
  • Magnetic field oriented flaky soft magnetic composite material and preparation method thereof
  • Magnetic field oriented flaky soft magnetic composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Spherical carbonyl iron samples with an average particle size of 3 to 4 microns were wet-milled by adding 50ml of n-hexane into a planetary ball mill, the ball-to-material ratio was 25:1, the ball-milling speed was 300r / min, and the ball-milling time was set to 8 hours. After ball-milling, the sample The thickness of the sample is about 0.2 microns, and the aspect ratio is 50. After ball milling for 8 hours, the sample is dried in a vacuum oven (25° C.) for later use. See the appendix for the morphology of the samples obtained by grinding image 3 , From the scanning electron microscope photos, it can be seen that the metal particles are irregular flakes.

[0020] Weigh a certain amount of flake-shaped particles obtained through the aforementioned treatment, add it into the titanate coupling agent diluted with isopropanol at a mass ratio of 100:1, and perform ultrasonic treatment in an ultrasonic cell pulverizer for 30 minutes, with an ultrasonic power of 180W, so that...

Embodiment 2

[0023] Fe with a particle size of about 10 microns 50 Ni 50 The alloy is milled with a planetary ball mill, using a 100ml stainless steel tank, adding about 50ml of n-hexane, the ball-to-material ratio is 25:1, the revolution speed is 280r / min, the ball milling time is 16 hours, and the sample is about 0.5 microns thick after ball milling. The aspect ratio is 100, and the sample morphology is shown in the attached Figure 4 . Depend on Figure 4 It can be seen that the metal particles after grinding are in the form of irregular flakes.

[0024] Weigh a certain amount of metal flake particles after the aforementioned ball milling treatment, add them into titanate coupling agent diluted with isopropanol at a mass ratio of 100:1, and sonicate in an ultrasonic cell pulverizer for 30 minutes with an ultrasonic power of 180W , so that the titanate coupling agent is fully adsorbed on the metal powder. The ultrasonic sample and paraffin are mixed evenly at a volume concentration ...

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Abstract

The invention relates to a material compounded by a magnetic material and a binding material and a preparation method thereof, wherein the magnetic material is flaky and has orientation property. The material is prepared by the following method: firstly, evenly mixing flaky soft magnetic metal powder with the uncured binding material with volume ratio of 1-9:9-1; secondly, putting the evenly-mixed compound into a mould made of a nonconductive magnetic material; and finally, placing the mould in a magnetic field with 10 to 10 Tesla, making the mould rotate in the magnetic field at a rotational speed of between 1 to 20 revolutions/minute for more than 1 minute, and curing the binding material.

Description

technical field [0001] The invention relates to a preparation method of a magnetic material, in particular to a compound of a magnetic material and an adhesive material, wherein the shape of the magnetic material is sheet-like and has orientation characteristics. Background technique [0002] With the advancement of science and technology and the rapid development of the information industry, equipment (systems) such as computers, mobile phones, fax machines, telephones, and networks have been widely used in the processing of information generation, transmission, reception, and storage. This type of equipment cannot work without the interaction between magnetic materials and electromagnetic fields, and most of these applications require materials with high complex permeability to reduce the noise of the equipment, or to enable the equipment to effectively shield electromagnetic waves. To ensure the normal use of equipment, this type of material is required in many fields suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/22C22C33/02B22F3/00B22F3/02
Inventor 李发伸王建波位建强韩瑞
Owner LANZHOU UNIVERSITY
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