Organic insulating binder for metal soft-magnetic composite material and method for preparing metal soft-magnetic composite material

A composite material and metal soft magnetic technology, which is applied in the field of insulating adhesive to prepare metal soft magnetic composite materials and organic insulating adhesive, can solve the problems of poor heat resistance, increase forming pressure and heat treatment temperature, increase density, The effect of small magnetic loss

Active Publication Date: 2014-03-26
NBTM NEW MATERIALS GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The advantages of organic matter as an insulating binder are that it is simple and easy to operate, the form

Method used

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  • Organic insulating binder for metal soft-magnetic composite material and method for preparing metal soft-magnetic composite material
  • Organic insulating binder for metal soft-magnetic composite material and method for preparing metal soft-magnetic composite material
  • Organic insulating binder for metal soft-magnetic composite material and method for preparing metal soft-magnetic composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Water-atomized pure Fe powder with an average particle size of 38 μm and 1% nano-Al 2 o 3 Mix evenly; add 0.5% silane coupling agent to the mixed powder and mix evenly, then alicyclic epoxy resin (20%), methyl hexahydrophthalic anhydride (10%), silicon Add 0.5% of the resin (40%) and xylene (30%) mixture and mix evenly; put the mixed material in a drying oven at 120°C for 2 hours; disintegrate the cooled material and pass it through a 100-mesh sieve; the obtained powder Add 0.1% KP-11 lubricant and mix well. Then press 1300MPa to form a ф16×ф8×5 ring, and then dry it at 150°C and keep it warm for 120min. Conduct a magnetic performance test. The properties of the obtained samples are shown in Table 1 (B max =20mT).

[0039] Table 1

[0040] Frequency / kHz

[0041] Result in table 1 is compared with existing pure Fe soft magnetic composite material, and the magnet prepared by the present invention has better magnetic permeability frequency characteristic, and...

Embodiment 2

[0043] Water-atomized pure Fe powder with an average particle size of 24 μm and 2% nano-Al 2 o 3 Mix evenly; add 0.6% silane coupling agent to the mixed powder and mix evenly, then alicyclic epoxy resin (30%), methyl hexahydrophthalic anhydride (10%), silicon Add 1.0% of the resin (30%) and xylene (30%) mixture and mix evenly; put the mixed material in a drying oven at 150°C for 2 hours; disintegrate the cooled material and pass it through a 200-mesh sieve; the obtained powder Add 0.7% zinc stearate lubricant and mix well. Then press 1500MPa to form a ф16×ф8×5 ring, and then dry it at 150°C and keep it warm for 120min. Conduct a magnetic performance test.

[0044] Gained sample properties are shown in Table 2 (B max =20mT).

[0045] Table 2

[0046] Frequency / kHz

[0047] Result in table 2 is compared with existing pure Fe soft magnetic composite material, and the magnet prepared by the present invention has better magnetic permeability frequency characteristic...

Embodiment 3

[0049] Water-atomized pure Fe powder with an average particle size of 45 μm and 0.8% nano-SiO 2 Mix evenly; add 0.3% silane coupling agent to the mixed powder and mix evenly, then alicyclic epoxy resin (30%), methyl hexahydrophthalic anhydride (15%), silicon Add 1.5% of the resin (35%) and xylene (20%) mixture and mix evenly; put the mixed material in a drying oven at 120°C for 2 hours; disintegrate the cooled material and pass it through a 100-mesh sieve; the obtained powder Add 0.5% zinc stearate lubricant and mix well. Then press 1000MPa to form a ф16×ф8×5 ring, and then dry it at 180°C and hold it for 120 minutes. The obtained sample is heat-treated at 650°C in a sintering furnace with an atmosphere of decomposing ammonia and held for 120 minutes. Finally, the sample is tested on a BH tester. Conduct a magnetic performance test. Gained sample properties are shown in Table 3 (B max =20mT).

[0050] table 3

[0051] Frequency / kHz

[0052] Result in table 3 is ...

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PUM

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Abstract

The invention discloses an organic insulating binder for a metal soft-magnetic composite material and a magnet preparation method thereof. The organic insulating binder is composed of liquid A and liquid B, wherein the liquid A is a 0.2%-0.6% silane coupling agent; the liquid B is an insulated coating liquid which is formed by mixing 10wt%-30wt% of alicyclic epoxy resin, 5wt%-15wt% of methyl hexahydrophthalic anhydride, 20wt%-60wt% of silicon resin and 10wt%-40wt% of dimethyl benzene, wherein total dosage of the liquid B is 0.5%-1.5%. The preparation method comprises the following steps: uniformly coating a layer of liquid A silane coupling agent on the surface of metal powder; then, coating the liquid B coating liquid; and preparing the metal soft-magnetic composite material by the steps such as drying, profiling, degreasing and thermal-treating. Compared with an organic binder with other components, the organic substance insulating binder disclosed by the invention has a high heat-resistant temperature and good binding effect, can reduce dosage, so that content of non-magnetic substances is reduced, thereby facilitating improving magnetic conductivity of a magnet and lowering loss. The metal soft-magnetic composite material prepared by adopting the preparation method disclosed by the invention has better magnetic performance and frequency stability.

Description

technical field [0001] The invention belongs to the field of metal powder metallurgy and magnetic materials, in particular to a high-temperature-resistant organic insulating binder for metal soft magnetic composite materials, and a method for preparing metal soft magnetic composite materials by using the insulating binder. Background technique [0002] Metal soft magnetic composites (Soft Magnetic Composites, SMCs) produced by powder metallurgy technology have become a hot spot in the research and development of magnetic core materials. The advantage is that it is a bulk material obtained by using high-purity iron powder or iron-based alloy powder as a raw material, coating the surface of the iron powder particles with an insulating medium layer, pressing the powder into the desired shape, and heat treatment. It is called "insulation coated iron powder core". The components made by it are widely used in electromagnetic devices such as transformers, motors, electromagnets, c...

Claims

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Application Information

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IPC IPC(8): C09J183/04C09J163/00C09J11/06H01F1/12H01F1/22
Inventor 彭元东孙志月郑财明包崇玺
Owner NBTM NEW MATERIALS GRP
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