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A kind of preparation method of metal magnetic powder core

A magnetic powder core and magnetic powder technology, applied in the manufacture of inductors/transformers/magnets, magnetic objects, magnetic materials, etc., can solve the problems of low saturation magnetic induction intensity, low forming density and low magnetic permeability of composite materials, and achieve fluidity. Good, high molding density, improve the effect of magnetic properties

Active Publication Date: 2021-07-16
NBTM NEW MATERIALS GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The frequency of the magnetic powder core manufactured by this method can reach the megahertz level, but the magnetic permeability is low (μ=10)
And because the powder is relatively fine, the molding density is not high, and the organic matter contained is more, the saturation magnetic induction of the composite material is also very low.

Method used

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  • A kind of preparation method of metal magnetic powder core
  • A kind of preparation method of metal magnetic powder core
  • A kind of preparation method of metal magnetic powder core

Examples

Experimental program
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preparation example Construction

[0031] The method of preparing the metal magnetic powder core in this embodiment sequentially comprises the following steps:

[0032] 1) Configure the phosphoric acid solution: the phosphoric acid and the solvent ratio are 1: 5, where the solvent in the phosphoric acid solution is ethanol;

[0033] Configure a chromic acid solution: chromic acid and solvent ratio of 1:10, solvent in the chromic acid solution is deionized water;

[0034] 2) Magnetic powder slurry: add 1.5% phosphoric acid solution in a certain amount of iron nickel powder, followed by continuous stirring, and mix well until 5min, the initial magnetic powder slurry is continuously stirred until the initial magnetic powder slurry is dried; Then, a 2% chromic acid solution was added in the dry initial magnetic powder slurry, followed by continuous stirring, and mixed well until 15min, formed a ferrous nickel magnetic powder slurry, and then stirred until the iron nickel magnetic powder slurry dry The percentage of the a...

Embodiment 2

[0046] The metal magnetic powder core powder employed in this example is a ferrite magnetic powder and a ferrite molybdenum magnetine powder, wherein the iron nickel magnetic powder is a commercially purchased ordinary aerosol powder, including nickel 45 wt%; iron nickel molybdenum powder containing 81% 2% molybdenum, the rest is iron; the particle size of the two magnetic powders is in the range of 5 to 25 μm. In this example, the particle size of the base powder is 3 to 15 um, wherein the proportion of particle size is 5 to 9um. No less than 55%; the particle size of the nano oxide is in 50 to 500 nm, and one or several of nano-tri-aluminum, silica and titanium dioxide can be used in the present embodiment. In the middle, nano oxide is nano-three oxide.

[0047] The method of preparing the metal magnetic powder core in this embodiment sequentially comprises the following steps:

[0048] 1) Configure the phosphoric acid solution: the phosphoric acid and the solvent ratio are 1: 5...

Embodiment 3

[0062] The metal magnetic powder core powder employed in this embodiment is a ferrite molybdenum magnetine powder, wherein the nickel contains 81%, the molybdenum contains 2%, the rest is iron; the particle size of the base powder is 3 to 15 um, wherein the particle size is 5 ~ The proportion of 9 um is not less than 55%; the particle size of the nano oxide is in 50 to 500 nm, one or several of nano-tri-aluminum, silica and titanium dioxide can be used, in the present embodiment, nano oxidation The object is nano-three oxide.

[0063] The method of preparing the metal magnetic powder core in this embodiment sequentially comprises the following steps:

[0064] 1) Configure the phosphoric acid solution: the phosphoric acid and the solvent ratio are 1: 10, where the solvent in the phosphoric acid solution is ethanol;

[0065] Configure the chromic acid solution: chromic acid and solvent ratio of 1: 15, solvent in the chromic acid solution is deionized water;

[0066] 2) Magnetic powd...

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Abstract

The invention relates to a method for preparing a metal magnetic powder core, which is characterized in that it comprises the following steps in sequence: 1) configuring a phosphoric acid solution and a chromic acid solution; then performing step 2) and step 3) sequentially, or sequentially performing step 3) and step 2 ); 2) Magnetic powder slurry: 3) Configure organic coating agent: 4) Add the organic coating agent configured in step 3) to the magnetic powder slurry configured in step 2), and add an adhesive, to be stirred Uniform drying to form a magnetic powder core to be formed; 5) pressing the magnetic powder core to be formed in step 4) to form a magnetic powder core blank; 6) heat treatment: heat treating the magnetic powder core blank in step 5) to form a magnetic powder blank. The metal magnetic powder prepared by this method has good fluidity, high molding density, high DC bias characteristics and low core power loss; in addition, it is prepared by using nano oxides and binders, and its The cost is low, pollution-free and waste-free, and the use effect is good.

Description

Technical field [0001] The present invention belongs to the metal soft magnetic material and powder metallurgy technology, and in particular, the present invention relates to a method of preparing a metal magnetic powder core used in a high frequency band. Background technique [0002] The fifth generation mobile communication standard (5G) uses a higher frequency while instantaneous current exceeding the limit value of the current electronic components. In order to meet the demand for inductive device under new standards, the high-frequency application basis used in the past use of ferrite materials has been restricted. The magnetic powder core is used as a novel composite soft magnetic material, which has good soft magnetic properties and frequency characteristics, and is a key component of the inductive device, in particular high frequency, high current, high power circuit. The metal magnetic core inductance at the ultra-high frequency, in order to reduce the eddy current loss...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/147H01F41/02
CPCH01F1/14741H01F41/0266
Inventor 聂军武包崇玺汤晓东
Owner NBTM NEW MATERIALS GRP
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