Method for preparing metal soft magnetic compound material by tape casting

A metal soft magnetic and composite material technology, applied in magnetic materials, magnetic objects, electrical components, etc., can solve problems such as inability to meet requirements, and achieve the effects of excellent mechanical strength, high surface quality, and simplified process

Active Publication Date: 2014-10-01
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the trend of miniaturization of electronic devices, the traditional soft magnetic ferrite thin film device materials have been unable to meet the requirements, and there is an urgent need for soft magnetic thin films with high resistivity and high saturation magnetic flux density, which makes the development of metal soft magnetic composite thin films have great necessity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 1) Phosphoric acid and acetone are made into a passivation solution with a mass fraction of 0.1%, and the reduced iron powder with an average particle size of 250 μm and the passivation solution are passivated according to a mass ratio of 1:0.01, and stirred in a mixer for 0.1 h, put it into an oven for passivation, the baking temperature is 40° C., and the passivation time is 4 hours to obtain passivation powder. Add a mixed solvent to the passivation powder, the solvent is trichlorethylene and ethanol mixed at a ratio of 0.1:1, and the dispersant triolein is added, and the above raw materials are mixed and stirred for 30 hours, and then the binder epoxy resin is added, plasticized Glycerin is used as the binder, the mass fraction of the slurry is 30% as the binder, and the mass ratio of the binder to the plasticizer is 0.5. Stir the slurry for another 36 hours, disperse it with ultrasound for 5 minutes, filter it through a sieve, and vacuum degas it to obtain a unifor...

Embodiment 2

[0049] 1) Phosphoric acid and ethanol are made into a passivation solution with a mass fraction of 0.8%, and the iron-nickel alloy powder with an average particle size of 0.1 μm and the passivation solution are passivated according to a mass ratio of 1:0.5. Stir for 0.1h, put into an oven for passivation, the baking temperature is 40°C, and the passivation time is 4h, to obtain passivation powder. Add a mixed solvent to the passivation powder, the solvent is methyl ethyl ketone and ethanol mixed at 10:1, and the dispersant herring oil is added, the above raw materials are mixed and stirred for 20 hours, and then the binder epoxy resin and the plasticizer polyethylene glycol are added , the mass fraction of the binder is 15% of the slurry, and the mass ratio of the binder to the plasticizer is 1.0. Stir the slurry for another 30 hours, disperse it with ultrasound for 3 minutes, filter it through a sieve, and vacuum degas it to obtain a uniformly dispersed slurry. The solvent vo...

Embodiment 3

[0055] 1) Phosphoric acid and acetone are made into a passivation solution with a mass fraction of 5%, and the passivation is carried out by taking the iron-silicon-aluminum alloy powder with an average particle size of 150 μm and the passivation solution at a mass ratio of 1:1. Stir for 2 hours, put into an oven for passivation, the baking temperature is 100° C., and the passivation time is 0.1 hour to obtain passivation powder. Add a mixed solvent to the passivation powder, the solvent is trichlorethylene and methyl ethyl ketone mixed at a ratio of 1:1, and the dispersant triethanolamine is added, the above raw materials are mixed and stirred for 36 hours, and then W-6C magnetic powder glue, plasticizer glycerin, viscose The binder is 20% by mass of slurry, and the mass ratio of binder to plasticizer is 0.8. Stir the slurry for another 40 hours, disperse it with ultrasound for 1min, filter it through a sieve, and vacuum degas to obtain a uniformly dispersed slurry. The solve...

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PUM

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Abstract

The invention discloses a method of preparing a metal soft magnetic compound material by tape casting. The method mainly comprises the following steps: 1) mixing a passivant and a solvent according to a mass fraction of the passivant being 0.1-0.5% to obtain a passivation liquid, mixing the passivation liquid with magnetic metal powder according to a mass ratio of 0.01-1, stirring and drying to obtain passivation powder; 2) mixing the passivation powder with an organic solvent, a dispersant, a binder and a plasticizer, uniformly stirring, filtering through a screen and defoaming to prepare uniformly dispersed slurry; 3) tape casting; and 4) drying and curing. The method disclosed by the invention has the advantages that the metal soft magnetic compound material prepared by tape casting has the characteristics of high electrical resistivity and higher saturation flux density than conventional ferrite. By means of a mature tape casting process, the production process of the metal soft magnetic compound material is simplified and the cost is lowered; and the metal soft magnetic compound material has a wide application prospect in preparation of electron devices such as thin-film inductors.

Description

technical field [0001] The invention relates to a method for tape casting to prepare metal soft magnetic composite materials, belonging to the field of new materials and new technologies for electronic components. Background technique [0002] The tape casting method, commonly known as the doctor blade forming method, is an important forming method for preparing large-area films. The process mainly includes slurry preparation, forming, drying, sintering, and baseband stripping. The tape casting method can conveniently control the thickness of the film and prepare multi-layer films. The equipment is simple, the process is stable, continuous operation is possible, the production efficiency is high, and the degree of automation is high. The tape casting method was first used in papermaking, plastic box coating and other industries. In recent decades, the application research of tape casting method has made great progress, and it is widely used in the electronics industry, energ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/00H01F1/147
Inventor 严密白国华吴琛
Owner ZHEJIANG UNIV
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