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Preparation method of iron-nickel soft magnet with nano anti-corrosion body layer

A soft magnet and nanotechnology, which is applied in the manufacture of inductors/transformers/magnets, inorganic material magnetism, electrical components, etc., can solve the problems of long time, poor corrosion resistance of alloys, damage, etc., and achieves simple preparation method, excellent resistance Corrosive, good single-phase effect

Inactive Publication Date: 2018-11-27
苏州诺弘添恒材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, the preparation of NiFe 2 o 4 There are many methods of nano-powder, such as mechanical alloying method can prepare nickel ferrite nano-crystal, but it needs a long time of grinding, time-consuming, high energy consumption, so the cost is high
[0004] Due to the active nature of the soft magnetic alloy, the corrosion resistance of the entire alloy becomes very poor, especially in a hot and humid environment, it is easy to rust and corrode, and the magnetic performance is reduced or damaged due to corrosion failure, which seriously affects the soft magnetic properties. The service life of the alloy reduces the stability and reliability of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Get ferric chloride, oxalic acid and nickel chloride to be dissolved in hydrochloric acid solution, the mol ratio of standby ferric chloride, oxalic acid and nickel chloride is clarified after ultrasonic dispersion is 3:2:1, and the molar concentration of hydrochloric acid is 1.6 mol / L, The ratio of the total molar amount of ferric chloride, oxalic acid and nickel chloride to hydrochloric acid is 1:3.

[0022] Add complexing agent after the solution is clarified, add acrylamide after the complexing agent is completely dissolved, ultrasonically disperse evenly and clarify, the molar ratio of complexing agent, ferric chloride, nickel chloride and acrylamide is 1:1 : 6; adjust the pH to 2 with ammonia water, and finally heat the mixed solution at 60° C. to cause a thermal polymerization reaction, and the solution turns into a gel.

[0023] Dry the gel in a constant temperature drying oven at 110°C for 7 hours, then place it in a high-temperature furnace at 430°C for 50 min...

Embodiment 2

[0028] Get ferric chloride, oxalic acid and nickel chloride to be dissolved in hydrochloric acid solution, the mol ratio of standby ferric chloride, oxalic acid and nickel chloride is clarified after ultrasonic dispersion is 5:4:2, and the molar concentration of hydrochloric acid is 1.9 mol / L, The ratio of the total molar amount of ferric chloride, oxalic acid and nickel chloride to hydrochloric acid is 3:10.

[0029] Add a complexing agent after the solution is clarified, add acrylamide after the complexing agent is completely dissolved, ultrasonically disperse evenly and clarify, the molar ratio of complexing agent, ferric chloride, nickel chloride and acrylamide is 2:1 : 8; adjust the pH to 3 with ammonia water, and finally heat the mixed solution at 80° C. to cause thermal polymerization to occur, and the solution turns into a gel.

[0030] Dry the gel in a constant temperature drying oven at 120°C for 9 hours, then place it in a high-temperature furnace at 460°C for 70 mi...

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PUM

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Abstract

The invention discloses a preparation method of an iron-nickel soft magnet with a nano anti-corrosion body layer. NiFe2O4 magnetic nanoparticles are prepared by adopting an improved sol-gel method, have the good single-phase property and are uniformly dispersed, the preparation method is simple, and the cost is low compared with the prior art; the iron-nickel soft magnet is subjected to surface treatment by adopting nano ceramic, so that the iron-nickel soft magnet has the advantages of excellent corrosion resistance, ultra-low demagnetization performance, impact resistance and the like.

Description

technical field [0001] The invention relates to the field of magnetic material manufacturing, in particular to a method for preparing an iron-nickel soft magnet with a nano anticorrosion layer. Background technique [0002] Since its inception, iron-based nanocrystalline soft magnetic alloy materials have received great attention and in-depth research due to their characteristics of high saturation magnetic induction, high magnetic permeability, low loss, and low coercive force, and have been widely used in switching power supplies. and electromagnetic sensors. [0003] NiFe 2 o 4 Type ferrite is a material with important application prospects. Because of their high magnetic permeability and low hysteresis loss, they are widely used in mutual inductance devices, soft magnetic substrate bearings, transfer switches, and magnetic recording. Currently, the preparation of NiFe 2 o 4 There are many methods for nano-powder, such as mechanical alloying method can prepare nick...

Claims

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Application Information

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IPC IPC(8): H01F41/02H01F1/38
CPCH01F1/38H01F41/02
Inventor 不公告发明人
Owner 苏州诺弘添恒材料科技有限公司