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Method for preparing composite magnetic material by using gel method by using ferromagnetic particles

A technology of ferromagnetic particles and gel method, which is applied in the field of magnetic material manufacturing, can solve the problems of low forming rate, collapse and deformation, and long time consumption of printed products, and achieve the effects of low cost, high forming rate and high curing speed

Inactive Publication Date: 2019-04-09
瞿凌飞
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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] In the process of 3D gel printing magnetic material products, chemical methods are used to cure them while printing, but because chemical curing takes a certain amount of time, there is a certain limit to the size of the printed product. If the size of the printed product is large, due to The product is not fully cured during the printing process, and materials continue to accumulate on the incompletely cured printing layer, resulting in defects such as collapse and deformation, which makes the forming rate of the printed product low

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

[0027] 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.

[0028] 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.

[0029] 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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Abstract

The invention discloses a method for preparing a composite magnetic material by using a gel method by using ferromagnetic particles. An improved sol-gel method is adopted to prepare NiFe2O4 magnetic nano-particles, the single-phase performance is good, the dispersion is relatively uniform, the preparation method is simple, and the cost is relatively low in comparison with the prior art. Accordingto the method in the invention, chemical curing and photo-curing are combined so that the curing time is shortened, the curing speed of the magnetic material is increased, and consequently, the forming rate of the product is improved.

Description

Technical field [0001] The invention relates to the field of magnetic material manufacturing, in particular to a method for preparing composite magnetic materials by ferromagnetic particles using a gel method. Background technique [0002] At present, power electronic devices are developing in the direction of energy saving, miniaturization and high precision. Soft magnetic materials with high saturation induction (BS), low loss and high permeability (μ) have become an important direction of research and development in the field of magnetic materials. Amorphous and nanocrystalline soft magnetic alloys have gradually become a hot spot for development by various related companies and research institutions in recent years because of their soft magnetic properties. [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, magnetic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/37
CPCH01F1/37
Inventor 瞿凌飞
Owner 瞿凌飞
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