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Preparation method of soft magnetic ferrimagnetics

A soft ferrite and magnet technology, which is used in the manufacture of inductors/transformers/magnets, inorganic material magnetism, electrical components, etc., to achieve the effects of simple mold processing, low equipment requirements, and simple molding process.

Inactive Publication Date: 2002-09-04
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The toxicity of acrylamide has become a bottleneck restricting the industrial application of this technology in addition to process factors

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Mix hydroxyethyl methacrylate (HEMA) and tetraethylene glycol diacrylate (TEGA) in a weight ratio of 10:1; add 5% by weight of the mixture, 3 % Dispersant Duramax TM D-3005, 0.17% ammonium persulfate, fully mixed to make a monomer solution; add soft magnetic ferrite powder to the monomer solution, mix well to make a stable suspension system; pour the suspension system to the molding In the mold, heat to 70°C, keep warm for 3 hours, then raise the temperature to 100°C, keep warm for 5 hours, demould, and dry. As described above, the present invention can be preferably realized.

Embodiment 2

[0015] Mix hydroxyethyl methacrylate (HEMA) with tetraethylene glycol diacrylate (TEGA) in a weight ratio of 20:1; add 10% by weight of the mixture to deionized water, 5 % Dispersant Duramax TM D-3007, 5% water-soluble polymer material PEO, 0.33% ammonium persulfate, fully mixed to make a monomer solution; add soft magnetic ferrite powder to the monomer solution, mix well to make a stable The suspension system; the suspension system is poured into a molding mold, heated to 65°C, kept for 6.5 hours, demoulded, and dried. As described above, the present invention can be preferably realized.

Embodiment 3

[0017] Hydroxyethyl methacrylate (HEMA) and tetraethylene glycol diacrylate (TEGA) were mixed according to a weight ratio of 30:1; adding 20% ​​by weight of the mixture to deionized water, 10 % Dispersant Duramax TM D-3005, 10% water-soluble polymer material PVP, 0.67% ammonium persulfate, fully mixed to make a monomer solution; add soft magnetic ferrite powder to the monomer solution, mix well to make a stable The suspension system; the suspension system is poured into a molding mold, heated to 60°C, and kept for 3 hours, then the temperature is raised to 80°C, kept for 0.5 hours, demoulded, and dried. As described above, the present invention can be preferably realized.

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PUM

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Abstract

The preparation method of magnetically soft ferrite magnet includes the following steps: in deionized water adding (wt%) 5-30% of mixture of ethylol methacrylate and tetraglycol diacrylate (accordingto the mixing weight ratio of 10-50:1), 0-20% of water-soluble macromolecular material, 3-20% of dispersing agent and 0.17-2% of initiating agent, mixing them and preparing them into monomer solution, adding the magnetically soft ferrite powder into monomer solution, mixing them to obtain suspension system, pouring the suspension system into foring mould, heating, heat-insulating, demoulding and drying so as to obtain the invented product. The described monomer aqueous solution is non-toxic, and the ammonium persulfate can be adopted as initiating agent.

Description

(1) Technical field [0001] The invention relates to the technical field of magnet forming and processing, in particular to a method for preparing a soft ferrite magnet. (2) Background technology [0002] Soft magnetic ferrite material is a basic material with wide application, large output and low cost. It is one of the important pillar products in the electronics and electromechanical industries. Its promotion and application directly affect electronic information, home appliance industry, computer and communication, and environmental protection. And the development of energy-saving technology is also one of the symbols to measure the degree of economic development of a country. The practical use of soft ferrite materials has been half a world so far. Because of its high magnetic permeability, high resistivity, low loss and wear resistance of ceramics, it is used in electron beam deflection coils of TV sets, flyback transformers, Radio choke coils, mid-week transformers, i...

Claims

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Application Information

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IPC IPC(8): C04B35/26H01F1/34H01F41/02
Inventor 车晓舟朱敏
Owner SOUTH CHINA UNIV OF TECH
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