Unidirectional transparent composite magnet and preparation method

A composite magnet, transparent technology, applied in the direction of inductor/transformer/magnet manufacturing, permanent magnet, inorganic material magnetism, etc., can solve the problem of limiting functional magnetic materials, and achieve the effect of simple process and cost reduction

Inactive Publication Date: 2013-03-06
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Therefore, how to use the existing technical means to obtain magnetic materials with light-transmitting properties is an important reason that limits the further development of functional magnetic materials.

Method used

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  • Unidirectional transparent composite magnet and preparation method

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preparation example Construction

[0026] The invention relates to a one-way transparent composite magnet and a preparation method thereof. The preparation method of a kind of unidirectional transparent composite magnet provided by the present invention comprises the following steps:

[0027] Step 1) preparation of particle composite system

[0028] Add 5 to 100 parts of ferromagnetic particles with an average size of 0.1 to 100 μm into 100 parts of thermosetting or thermoplastic organic monomers, stir and disperse at 20 to 250 °C for 0.5 to 10 hours; After uniform dispersion, add 1-15 parts of curing agent or cross-linking agent, and continue stirring for 30 seconds.

[0029] Step 2) Orientation of Magnetic Particles in Magnetic Field

[0030] The dispersion composite system is injected into the mould, and then a magnetic field is applied at the mould, the magnetic field strength is 0.01-2.0T, and the orientation time is 1-60min.

[0031] Step 3) Curing

[0032] Place the oriented and formed sample in an o...

Embodiment 1

[0036] Add 10 parts of Fe powder with an average particle size of 0.1 μm to 100 parts of unsaturated polyester monomer, stir and disperse in a water bath at 20°C for 5 hours; after the system is uniformly dispersed, add 5 parts of crosslinking agent styrene, Continue stirring for 30s.

[0037] The dispersion composite system is injected into the mold, and then a magnetic field is applied at the mold, the magnetic field is generated by an electromagnetic coil, the magnetic field strength is 0.1T, and the orientation time is 5min.

[0038] Put the oriented sample into an oven for curing, the temperature of the oven is 20°C, and the temperature is kept for 480h.

[0039] The prepared sample has dense structure, low porosity and smooth surface. Metallographic observation was carried out on the sample prepared in Example 1, and it was found that Fe in the polymer matrix was distributed in chain-like clusters along the direction of the external magnetic field. The saturation magne...

Embodiment 2

[0041] Add 5 parts of Co powder with an average particle size of 1.5 μm to 100 parts of epoxy resin monomer, stir and disperse in a water bath at 60 ° C for 0.5 h; after the system is uniformly dispersed, add 15 parts of curing agent polyamide, continue Stir for 30s.

[0042] The dispersion composite system is injected into the mold, and then a magnetic field is applied at the mold. The magnetic field is generated by an electromagnet, the magnetic field strength is 0.8T, and the orientation time is 10 minutes.

[0043] Put the oriented sample into an oven for curing, the temperature of the oven is 80°C, and keep it warm for 20h.

[0044] The prepared sample has dense structure, low porosity and smooth surface. Metallographic observation was carried out on the sample prepared in Example 2, and it was found that Co in the polymer matrix was distributed in chain-like clusters along the direction of the external magnetic field. The saturation magnetization of the sample tested b...

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Abstract

The invention relates to a unidirectional transparent composite magnet and a preparation method. The preparation method comprises the following steps of: adding a certain quantity of ferromagnetic particles into an organic polymer monomer; carrying out even mechanical stirring under a proper temperature condition; if an organic matter is a thermosetting polymer, adding a proper quantity of curing agent or cross-linking agent after a system is evenly dispersed; continuously stirring evenly; injecting a dispersed composite system into a die; applying a magnetic field on the die; orienting for certain time; and keeping warm and solidifying a sample subjected to orienting forming for certain time until the sample is completely solidified. The technology for preparing the unidirectional transparent composite magnet disclosed by the invention is simple and practical. The prepared composite magnet sample has the advantages of compact tissue, low porosity and smooth surface. Magnetic particles in the magnet are in chained distribution under the action of an external magnetic field, and the magnetic particles have the photopermeability in the direction parallel to the cluster direction while the magnetic property is endowed to the magnet.

Description

technical field [0001] The invention relates to a one-way transparent composite magnet and a preparation method thereof, belonging to the field of material preparation. Background technique [0002] Magnet is an ancient and widely used functional material, and the magnetism of matter has been recognized and applied by people as early as 3,000 years ago. For example, natural magnets were used as compass in ancient China. Modern magnetic materials have been widely used in our lives, such as using permanent magnet materials as motors, core materials used in transformers, magneto-optical disks used as memories, magnetic recording floppy disks for computers, etc. It can be said that magnetic materials are closely related to all aspects of informatization, automation, mechatronics, national defense, and national economy. Magnetic materials are mainly divided into permanent magnetic materials and soft magnetic materials. Among them, permanent magnet materials include: metal perma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F7/02H01F1/42H01F1/09H01F41/02
Inventor 彭晓领金顶峰洪波金红晓王新庆徐靖才葛洪良
Owner CHINA JILIANG UNIV
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