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Inorganic binder used for metal soft magnetic powder core and metal soft magnetic powder core

An inorganic binder and metal soft magnetic technology, applied in the field of metal powder alloys, can solve the problems of being unsuitable for large-scale promotion and use, unsuitable for large-scale promotion, environmental damage, etc., and achieve stable performance, good high temperature resistance, The effect of prolonging the service life

Active Publication Date: 2016-07-27
SHENZHEN ZHENHUA FU ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the insulation and strength of the iron core after high-temperature heat treatment are guaranteed, the insulation solution uses a mixture of "potassium dichromate" and phosphoric acid to achieve insulation and passivation on the surface of the powder, while Cr +6 It is a hazardous substance marked in ROSH, which is extremely polluting to the environment, so it is not suitable for large-scale promotion
In addition, the materials used in the traditional iron core production process involve hazardous substances marked in ROSH, which cause serious damage to the environment. Although the use effect can meet the needs, it is not suitable for large-scale promotion and use.
[0009] Based on the above existing technologies, there is currently no one that can simultaneously satisfy: all inorganic, non-decomposing by heat treatment, low-temperature curing, good insulation bonding effect, anti-aging, and ROSH-compliant insulation adhesive applied to metal soft magnetic powder cores method appears

Method used

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  • Inorganic binder used for metal soft magnetic powder core and metal soft magnetic powder core
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  • Inorganic binder used for metal soft magnetic powder core and metal soft magnetic powder core

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preparation example Construction

[0045] Correspondingly, an embodiment of the present invention provides a method for preparing an inorganic binder used in the preparation of metal soft magnetic powder cores, including the following steps, specifically as attached figure 1 Shown:

[0046] S01. Prepare aluminum phosphate matrix components;

[0047] S02. Weighing the formula components: Weighing each component according to the above-mentioned formula of the inorganic binder used for the preparation of the metal soft magnetic powder core;

[0048] S03. Glue adjustment treatment: Mix the above-mentioned components except the aggregate to obtain a pre-mixture, then add the aggregate into the pre-mixture, mix uniformly at 70-100°C, and cool.

[0049] Specifically, in the above step S01, the preparation method of the aluminum phosphate matrix component is: according to the weight ratio of 33:1, respectively measure phosphoric acid and aluminum hydroxide with a concentration of 85% by weight, and heat treatment to o...

Embodiment 1

[0077] An inorganic binder used for the preparation of metal soft magnetic powder cores, based on the total weight of the inorganic binder as 100%, the formula components and corresponding component contents included in it are shown in Example 1 in the following table 1, wherein The matrix is ​​an aluminum phosphate matrix, the curing agent is zinc oxide, the aggregate is divided into aggregate I and aggregate II, the aggregate I is kaolin, the aggregate II is silica, and the aggregate II is silica. The additives are sodium phosphate, sodium tungstate and oxalic acid.

[0078] The preparation method of the inorganic binder used for the preparation of the metal soft magnetic powder core is:

[0079] S11. Preparation of aluminum phosphate matrix components: Measure 165g of phosphoric acid (85%), add 5g of aluminum hydroxide, heat to 180°C and stir for 5-10min until the solution becomes a colorless, transparent viscous liquid, continue to heat up to 220°C, and keep for 1 -After ...

Embodiment 2

[0083] An inorganic binder used for the preparation of metal soft magnetic powder cores, based on the total weight of the inorganic binder as 100%, the formula components it includes and the content of the corresponding components are shown in Example 2 in the following table 1, wherein The matrix is ​​an aluminum phosphate matrix, the curing agent is copper oxide, the aggregate is divided into aggregate I and aggregate II, the aggregate I is kaolin, the aggregate II is silica, and the aggregate II is silica. The additives are sodium phosphate, sodium tungstate and oxalic acid.

[0084] The preparation method of the inorganic binder used for the preparation of the metal soft magnetic powder core is:

[0085] S21. Preparation of aluminum phosphate matrix components: according to the ratio of 33:1 by weight, measure phosphoric acid and aluminum hydroxide with a concentration of 85% by weight respectively, heat treatment to obtain a colorless transparent viscous liquid, and conti...

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Abstract

The invention is applicable to the field of metal powder alloy and provides an inorganic binder used for a metal soft magnetic powder core, the metal soft magnetic powder core and a preparation method of the metal soft magnetic powder core. The inorganic binder comprises the following formula components of, by the total weight of 100%, a matrix, a curing agent, a skeletal material and an additive, wherein the matrix is an aluminum phosphate matrix. The inorganic binder serves as the binder of the metal soft magnetic powder core. According to the inorganic binder provided by the invention, the binding effect is good, and meanwhile the requirements for the total inorganic performance, indecomposition of heat treatment, low-temperature curing, the ageing resistance and meeting of the ROSH standard are met.

Description

technical field [0001] The invention belongs to the field of metal powder alloys, and in particular relates to an inorganic binder for metal soft magnetic powder cores, a metal soft magnetic powder core and a preparation method thereof. Background technique [0002] The metal soft magnetic powder core is obtained by mixing soft magnetic alloy powder with insulating agent and binder uniformly, then pressing and molding, and heat-treating. At present, metal soft magnetic powder cores mainly use iron powder cores, iron-nickel alloy powder cores, iron-nickel-molybdenum alloy powder cores, and iron-silicon aluminum alloy powder cores as soft magnetic powder core powders. Metal soft magnetic powder core is a key node in the manufacture of inductors, especially high-frequency, high-current, and high-power inductors. The main parameters that reflect the performance of metal soft magnetic powder cores include: saturation magnetic induction, magnetic permeability, quality factor, pow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F1/02H01F27/255H01F1/147H01F1/22
Inventor 刘旸王海樊应县朱建华王智会
Owner SHENZHEN ZHENHUA FU ELECTRONICS
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