Amorphous nano crystal soft magnet alloy strip with surface insulation coating and its preparation method

A technology of soft magnetic alloy strips and amorphous nanocrystals, applied in the direction of coating liquid devices, coatings, insulators, etc., can solve the problem of hard coatings, insulating coatings that cannot withstand higher temperatures, and affect magnetic properties and other issues to achieve the effect of reducing loss

Inactive Publication Date: 2008-02-20
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in these surface coating technologies, the coated materials can only work at low frequencies (below 20kHz), and the coating is relatively hard. If it is applied to a soft amorphous nanocrystalline alloy strip with a thickness of only 0.03mm, then will seriously affect its magnetic properties
[0007] To sum up, the existing coating technology of amorphous and nanocrystalline ribbons makes the insulating coating unable to withstand higher temperatures, and the insulating coating on the ribbon surface is relatively hard

Method used

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  • Amorphous nano crystal soft magnet alloy strip with surface insulation coating and its preparation method
  • Amorphous nano crystal soft magnet alloy strip with surface insulation coating and its preparation method
  • Amorphous nano crystal soft magnet alloy strip with surface insulation coating and its preparation method

Examples

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Effect test

Embodiment 1

[0057] After mixing 125g of silicon carbide powder with an average particle size of 50 μm and 375 g of alumina powder with an average particle size of 200 μm, add 5 kg of deionized water and stir continuously to form a suspension. 82.5 Mo 2.5 Si 5 B 10 Dip-coat the amorphous strip in the suspension for 90s, then bake the amorphous strip at 160°C for 300s to form an insulating layer with a thickness of 7μm on both surfaces, then test its breakdown voltage, and then Wind it into a φ64-40-20mm magnetic core, keep it warm for 360 minutes under the protection of nitrogen at 380°C, and then test the loss of the magnetic core. At 20kHz, 0.2T, the loss is 24W / kg, and the breakdown voltage is 172V. This method The raw materials used are cheap, easy to operate, Fe 82.5 Mo 2.5 Si 5 B 10 Amorphous strips have lower loss after coating and higher breakdown voltage.

Embodiment 2

[0059]Take 35g of boron trioxide powder with an average particle size of 90μm, 45g of magnesium oxide powder with an average particle size of 150μm, and 30g of silicon dioxide powder with an average particle size of 400μm, mix them uniformly, add 4.2kg of 20% ethanol aqueous solution and keep stirring Uniformly form a suspension, the 10mm wide Fe 75 Cu 1 Mo 3 Si 15 B 6 Soak the nanocrystalline strip in the suspension for 60s, and bake the amorphous nanocrystalline strip with an insulating layer at 150°C for 1200s to form an insulating layer with a thickness of 1.5μm on each of its two surfaces; Wind it into a magnetic core of φ18-12-10mm, keep it warm for 30 minutes under the protection of argon at 580°C, and then test the loss of the magnetic core and the breakdown voltage of the strip. The loss is 30W / kg at 0.5T at 20kHz before coating. After coating, the loss is 20W / kg at 20kHz, 0.5T, 10W / kg at 20kHz, 0.2T, and the breakdown voltage is 60V. The raw materials used in th...

Embodiment 3

[0061] Take 300g tetraethyl orthosilicate, 100g polyester modified silicone resin, add to 4.6kg ethanol, stir to form an organic solution, put 10mm wide Co 78 Fe 4 Ni 2 Si 6 B 10 The amorphous strip was soaked in the organic solution for 120s, and then baked at 120°C for 600s. Take another 1.5kg of K with a modulus of 2.5 2 O SiO 2 , dissolved in 3.5kg of deionized water at 60°C, stirred evenly, and then the above-mentioned 10mm wide Co 78 Fe 4 Ni 2 Si 6 B 10 The amorphous strip is soaked in the coating solution for 70s, baked at 160°C for 300s, so that an insulating layer with a thickness of 1.5μm and 2μm is formed on the two surfaces of the strip, and it is wound into a φ18-12-10mm The magnetic core was kept at 450°C for 50 minutes under the protection of nitrogen. Then test the loss of the magnetic core and the breakdown voltage of the strip, 20kHz before coating, the loss at 0.5T is 18W / kg, 20kHz after coating, the loss at 0.5T is 16W / kg, 20kHz, the loss at 0.2T...

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Abstract

The utility model puts forward a soft magnetic alloy belt material and production method; wherein, the surface of the belt material has a coating layer with good electrical insulation properties. The soft magnetic alloy belt material is dip-coated in the treating liquid confected through the selection of at least one type of the inorganic matter suspension, the inorganic solution and organic solution with the soft magnetic alloy belt material being dip-coated for 60 to 600 seconds in the treating liquid; then the soft magnetic alloy belt material is baked under the temperature of 90 to 250 DEG C for 60 to 1200 seconds, which makes the thickness of the coating layer up to 0.5 to 15 Mum; the soft magnetic alloy belt material is wound to a magnetic core of corresponding size and then processed by annealing heat treatment to become a soft magnetic alloy belt material with an electrical insulation coated layer. The utility model has the outstanding advantages that the breakdown voltages of the electrical insulation layer per Mum of the soft magnetic alloy belt material are all above 20V and the loss is reduced about 25%; the electrical insulation layer can guarantee the outstanding insulation between the belt material layers; meanwhile, the belt material has the excellent medium high frequency soft magnetism, and the coating material can endure the high temperature above 500 DEG C; thus, the outstanding electric insulation properties and performance can be achieved.

Description

technical field [0001] The invention relates to the field of metal insulating materials, in particular to an amorphous nanocrystalline soft magnetic alloy insulating tape whose surface is coated with a coating with good electrical insulating performance and a preparation method thereof. Background technique [0002] Metal soft magnetic materials usually need to work under an alternating magnetic field, and an alternating electric field is induced inside the material, thereby generating an induced current inside the material, that is, the energy of the electric field is consumed by the metal soft magnetic material in the form of eddy current loss. In order to reduce the eddy current loss of metal soft magnetic materials (such as pure iron), it is usually necessary to add some elements with higher resistivity (such as adding silicon to pure iron, or using ferrite), and make metal soft magnetic materials into thin sheets shape. When preparing some metal soft magnetic alloys, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/18H01B3/00B05D1/18B05D3/02B05D7/14B05D7/24B05C11/02C21D1/26C21D9/52
Inventor 张国祥陈非非王红霞王贤艳崔嘉义许妍唐书环
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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