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A kind of soft magnetic composite powder and its application

A technology of soft magnetic composite and soft magnetic composite materials, which is applied in the field of powder metallurgy and magnetic material preparation, can solve the problems without careful consideration, achieve the effect of reducing oxygen deficiency, improving magnetic and mechanical properties, and fine particles

Active Publication Date: 2018-12-25
湖南天盛新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since ferrite soft magnetic and metal magnetic powders have different heat treatment atmosphere requirements, and the coating and preparation of various soft magnetic composite materials mentioned above, there is no careful consideration and full use of different atmospheres to improve the heat treatment of magnetic powder or Magnet performance

Method used

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  • A kind of soft magnetic composite powder and its application
  • A kind of soft magnetic composite powder and its application
  • A kind of soft magnetic composite powder and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] With (NiZn)Fe 2 o 4 The content of coating in / Fe is 1.5wt% for proportioning and coating. Press Ni 0.5 Zn 0.5 Fe 2 o 4 Chemical formula ratio, the weighed reagent FeCl 3 ﹒ 6H 2 O, NiCl 2 ﹒ 6H 2 O and ZnCl 2 Dissolve in 75ml deionized water, stir and mix evenly with a glass rod to make solution A. At the same time, dissolve the reagent KOH in 75ml of deionized water, mix well to make alkaline solution B. In addition, a corresponding amount of pure iron powder with an average particle size of 30 um was added to 300 ml of deionized water to obtain a suspension C. So far, the preparatory work before the reaction is completed. During the reaction, drop the prepared solution A and alkali solution B into the suspension C at a speed of about 5ml / min at the same time, and at the same time, use a mechanical stirrer to continuously stir the suspension C to make it fully react, about 15min After the reaction was finished, let it stand for precipitation, and rinse th...

Embodiment 2

[0075] With (MnZn)Fe 2 o 4 / Fe 3.5 The content of coating in Si is 3wt% for proportioning and coating. Press Mn 0.4 Zn 0.6 Fe 2 o 4 Chemical formula ratio, the weighed reagent FeCl 3 ﹒ 6H 2 O, MnCl 2 ﹒ 4H 2 O and ZnCl 2Dissolve in 80ml deionized water, stir and mix evenly with a glass rod to make solution A. At the same time, dissolve the reagent NaOH in 80ml of deionized water, mix well to make alkaline solution B. In addition, a corresponding amount of Fe-3.5Si powder with an average particle size of 24um was added to 300ml of deionized water to obtain a suspension C. So far, the preparatory work before the reaction is completed. During the reaction, drop the prepared solution A and alkaline solution B into the suspension C at a speed of about 10ml / min at the same time, and at the same time, use a mechanical stirrer to continuously stir the suspension C to make it fully react, about 10min After the reaction was finished, let it stand for precipitation, and ri...

Embodiment 3

[0081] With (MnZn)Fe 2 o 4 The content of the coating in / FeSiAl is 1wt% for proportioning and coating. Press Mn 0.8 Zn 0.2 Fe 2 o 4 Chemical formula ratio, the weighed reagent Fe(NO 3 ) 3 ﹒ 9H 2 O, Mn(NO 3 ) 2 ﹒ 4H 2 O and Zn(NO 3 ) 2 ﹒ 6H 2 Dissolve O in 100ml deionized water, stir and mix evenly with a glass rod to make solution A. At the same time, dissolve the reagent NaOH in 100ml of deionized water, mix well to make alkaline solution B. In addition, a corresponding amount of Fe-9Si-6Al powder with an average particle size of 42um was added to 300ml of deionized water to obtain a suspension C. So far, the preparatory work before the reaction is completed. During the reaction, drop the prepared solution A and alkaline solution B into the suspension C at a rate of about 3ml / min at the same time, and at the same time, use a mechanical stirrer to continuously stir the suspension C to make it fully react, about 20min After the reaction was finished, let it...

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Abstract

The invention relates to a soft magnetic composite powder and its application. The preparation method of the soft magnetic composite powder is as follows: according to the ferrite soft magnetic chemical formula; prepare the water-soluble metal salt corresponding to the metal element in the ferrite, and make solution A; make the precipitant into solution B; Add magnetic metal powder into water to obtain suspension C; add solution A and B to C and co-precipitate at the same time to obtain coated powder; then perform low-temperature calcination under oxygen-containing atmosphere and high-temperature calcination under inert atmosphere in sequence; obtain composite powder . The specific scheme of the application is: add coupling agent, silicone resin and lubricant to the composite powder; select powder with appropriate particle size after drying; High-temperature annealing under atmosphere to obtain soft magnetic composite materials. The composite powder prepared by the invention has higher magnetic properties and resistivity, and the soft magnetic composite material has better magnetic properties, frequency stability and wider use frequency.

Description

technical field [0001] The invention relates to a soft magnetic composite powder and its application, in particular to a powder coating method composed of ferrite soft magnetic and metal magnetic powder, and the coating powder prepared in the soft magnetic composite material Application; belongs to the technical field of powder metallurgy and magnetic material preparation. technical background [0002] Soft magnetic composite materials have high magnetic permeability, low eddy current loss and total loss, and are widely used in iron in motors, transformers, inductors, frequency choke coils and power switches in the fields of communications, radar, electronics and power switches. core. Its operating frequency ranges from tens of hertz to megahertz. Coating the insulating layer on the metal magnetic powder is an important step in the preparation process. Generally speaking, insulating coatings are divided into organic and inorganic. Inorganic substances including metal oxi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/33B22F1/00B22F3/02B22F3/24
CPCH01F1/33B22F3/02B22F3/24B22F2003/248B22F1/10B22F1/145
Inventor 彭元东易依夏超李丽娅易健宏
Owner 湖南天盛新材料科技有限公司
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