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Preparation method for inorganic-organic composite adhesive-coated soft magnetic composite

An organic binder and inorganic composite technology, applied in the direction of magnetic properties of inorganic materials, can solve the problem of not specifying the composite method, and achieve the effect of improving the coating effect, improving the high-frequency performance and quality factors, and excellent magnetic properties.

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

AI Technical Summary

Problems solved by technology

The composite binders of these compositions can combine the advantages of the excellent bonding properties of organic binders and the relatively high thermal stability of inorganic binders, but none of them have pointed out an effective composite method to maximize the two kinds of adhesives. Advantages of binders

Method used

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  • Preparation method for inorganic-organic composite adhesive-coated soft magnetic composite
  • Preparation method for inorganic-organic composite adhesive-coated soft magnetic composite
  • Preparation method for inorganic-organic composite adhesive-coated soft magnetic composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Take an appropriate amount of pure iron powder and mix iron powders of different meshes. The iron powder powder with a particle size of -100 mesh to +200 mesh accounts for 10% of the total mass, and the iron powder of -200 mesh to +400 mesh Powder accounts for 60% of the total mass, and iron powder with a mesh size of 400 or more accounts for 30% of the total mass.

[0017] (2) Passivate the configured iron powder with phosphoric acid, stir and dry in a water bath at 60 °C to obtain passivated iron powder. The mass of phosphoric acid accounts for 1wt% of the total mass of iron powder.

[0018] (3) Dissolve the epoxy resin with acetone, and dissolve the low-melting glass powder with xylene, then mix the two together, and stir for 30 min in a water bath at 50 °C to obtain a uniformly mixed composite binder, and then mix with iron The powder is stirred and mixed, mixed evenly and then dried. The mass of the epoxy resin is 0.5 wt% of the total mass of the magnetic pow...

Embodiment 2

[0024] (1) Take an appropriate amount of sendust magnetic powder, mix sendust magnetic powder with different meshes, the particle size of the sendust magnetic powder can reach -100 mesh~+200 mesh, account for 30% of the total mass, and -200 mesh~+ 400 mesh sendust magnetic powder accounts for 40% of the total mass, and sendust magnetic powder above 400 mesh accounts for 30% of the total mass.

[0025] (2) Passivate the configured sendust magnetic powder with phosphoric acid, stir and dry in a water bath at 80°C to obtain passivated sendust powder. The mass of phosphoric acid accounts for 0.4wt% of the total mass of sendust magnetic powder.

[0026] (3) Dissolve the silicone resin in xylene, and the low-melting point glass powder in xylene, then mix the two together, and stir for 30 minutes in a water bath at 50°C to obtain a uniformly mixed composite binder, and then Stir and mix with sendust powder, mix evenly and then dry. The mass percentage of the silicone resin is 2% by...

Embodiment 3

[0031](1) Take an appropriate amount of iron-nickel-molybdenum magnetic powder (containing iron 17.0%, Mo2.0%, Cu1.0%, Al+Si<1.0%, the rest is Ni), and mix iron-nickel-molybdenum magnetic powder with different meshes The iron-nickel-molybdenum magnetic powder with a particle size of -100 mesh to +200 mesh accounts for 30% of the total mass, the iron-nickel-molybdenum magnetic powder powder of -200 mesh to +400 mesh accounts for 50% of the total mass, and the iron-nickel-molybdenum magnetic powder with a particle size of more than 400 mesh 20% of the total mass.

[0032] (2) Passivate the configured iron-nickel-molybdenum magnetic powder powder with chromic acid, stir and dry in a water bath at 70°C to obtain passivated iron-nickel-molybdenum magnetic powder. The mass of chromic acid accounts for 0.6wt% of the total mass of the iron-nickel-molybdenum magnetic powder.

[0033] (3) Dissolve the phenolic resin with absolute ethanol, B 3 o 2 Dissolve the powder in xylene, mix th...

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Abstract

The invention discloses a preparation method for inorganic-organic composite adhesive-coated soft magnetic composite. The preparation method for the inorganic-organic composite adhesive-coated soft magnetic composite includes steps that (1) mixing metal magnetic powder according to particle size distribution; (2) passivating the prepared magnetic powder of the step (1) through passivator; (3) using the adhesive composed of organic adhesive and inorganic adhesive to coat the passivated magnetic powder particles of the step (2); (4) pressing the bonded magnetic powder of the step (3) to obtain a magnetic powder core; (5) carrying out heat treatment on the pressed magnetic powder core of the step (4), and spraying to obtain a target product. The preparation method for the inorganic-organic composite adhesive-coated soft magnetic composite enables the compounding effect of the organic adhesive and inorganic adhesive to be improved and integrates advantages of the organic adhesive and inorganic adhesive; the inorganic-organic composite adhesive-coated soft magnetic composite is reasonable in component selection, is good in use effect and has good insulating bonding effect for iron-base metal soft magnetic powder, nickel-base metal soft magnetic powder and other metal soft magnetic powder with other components. The magnetic powder core made from the inorganic-organic composite insulating adhesive has excellent magnetic property and mechanical performance.

Description

technical field [0001] The invention belongs to the field of manufacturing insulating magnetic powder in magnetic materials, and in particular relates to a preparation method of an inorganic-organic composite binder-coated soft magnetic composite material. Background technique [0002] Metal magnetic powder core is a kind of composite soft magnetic material formed by mixing and pressing ferromagnetic metal particles and insulating medium. Magnetic powder cores are widely used because of their high magnetic flux density, high magnetic permeability and low cost. However, in practical applications, the resistivity of metal magnetic powder cores is too low, resulting in large eddy current losses and high frequency The loss is very large. Generally, an insulating film is evenly coated on the surface of the magnetic powder particles to increase the resistivity of the magnetic powder core, reduce eddy current loss, and improve the quality factor. Insulation coating is an extremely...

Claims

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Application Information

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IPC IPC(8): B22F1/02H01F1/24
Inventor 严密黄茂勤吴琛姜银珠
Owner ZHEJIANG UNIV
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