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Preparation method of antiseptic manganese, bismuth and aluminum permanent-magnet material

A technology of anti-corrosion manganese-bismuth-aluminum and permanent magnet materials, applied in the direction of magnetic materials, inductor/transformer/magnet manufacturing, magnetic objects, etc., can solve problems such as damage, easy rust and corrosion, and low forming rate of printed products, and achieve improved manufacturing Efficiency, excellent corrosion resistance, and stable permanent magnetic properties

Inactive Publication Date: 2018-03-23
SUZHOU NANER MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

MnBi alloys can form multiple closely related phases at room temperature, such as low-temperature phases, high-temperature phases, and new phases, etc., which restricts the development of MnBi alloys to a large extent. great difficulty
[0003] 3D printing is used in the molding of magnetic materials, which is a new technology. 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, the printing products There is a certain limit to the size of the printed product. If the size of the printed product is large, because the product is not fully cured during the printing process, the material will continue to accumulate on the incompletely cured printing layer, resulting in defects such as collapse and deformation, making the forming rate of the printed product low.
[0004] Due to the lively nature of the MnBi alloy, the corrosion resistance of the entire MnBi alloy becomes very poor, especially in a hot and humid environment, it is easy to rust and corrode, and the magnetic properties are reduced or damaged due to corrosion failure, which seriously affects the MnBi alloy. The service life of the alloy permanent magnet material reduces the stability and reliability of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The composition chemical formula of the main body of the permanent magnet material in this embodiment is Mn 57 Bi 42 al 1 .

[0023] Weigh each element according to the chemical formula of the above ingredients for batching; put the batching in the smelting furnace, and vacuumize the furnace to at least 5×10 -3 Pa; Then, pass helium gas until the pressure in the furnace is 50kPa; heat up to 1300°C to melt, stir, refine, and cast into a water-cooled copper mold for use.

[0024] The obtained alloy ingot is crushed, put into the quartz tube in the vacuum belt throwing machine, the diameter of the nozzle at the bottom of the quartz tube is 0.5 mm, after the chamber of the vacuum belt throwing machine is evacuated, the cavity is filled with protective gas; Turn on the power supply of the vacuum strip machine to heat and melt the alloy in the quartz tube. At the same time, control the distance from the nozzle at the bottom end of the quartz tube to the surface of the copp...

Embodiment 2

[0030] The compositional chemical formula of the main body of the permanent magnet material in this embodiment is Mn 52 Bi 45 al 3 .

[0031] Weigh each element according to the chemical formula of the above composition for batching; put the batching in the smelting furnace, and vacuumize the furnace to at least 5×10 -3 Pa; Then, pass helium gas until the pressure in the furnace is 80kPa; heat up to 1450°C to melt, stir, refine, and then cast it into a water-cooled copper mold for use.

[0032] The obtained alloy ingot is crushed and put into the quartz tube in the vacuum strip machine. The diameter of the nozzle at the bottom of the quartz tube is 0.8mm. After the cavity of the vacuum strip machine is vacuumed, fill the cavity with protective gas; Turn on the power supply of the vacuum strip machine to heat and melt the alloy in the quartz tube. At the same time, control the distance from the nozzle at the bottom of the quartz tube to the surface of the copper roller to be...

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Abstract

The invention discloses a preparation method of an antiseptic manganese, bismuth and aluminum permanent-magnet material. The permanent-magnet material prepared by adopting the method has excellent andstable permanent-magnet properties and can be obtained through the simple and easy preparation method. Chemical curing and photocuring are integrated, curing time is shortened, the cutting speed of the magnetic material is improved, accordingly the forming rate of prepared parts is improved, and the preparation efficiency of the magnetic material is improved. The manganese, bismuth and aluminum permanent-magnet material is also subjected to surface treatment so that the manganese, bismuth and aluminum permanent-magnet material can have the advantages of excellent corrosion resistance, ultra-low magnetism, impact resistance and the like.

Description

technical field [0001] The invention relates to the field of magnetic material manufacturing, in particular to a preparation method of an anti-corrosion manganese bismuth aluminum permanent magnet material. Background technique [0002] Low temperature phase (LTP) MnBi alloys have high magnetic anisotropy (11.6×10 6 erg / cc), Curie temperature is about 633K, and has a positive temperature coefficient of coercive force in the temperature range of 150K to 550K, so MnBi alloy is considered to be a high-temperature permanent magnet material with wide application prospects. The ferromagnetic properties of MnBi are mainly derived from its low-temperature phase. MnBi alloys can form multiple closely related phases at room temperature, such as low-temperature phases, high-temperature phases, and new phases, etc., which restricts the development of MnBi alloys to a large extent. Great difficulty came. [0003] 3D printing is used in the molding of magnetic materials, which is a new...

Claims

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Application Information

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IPC IPC(8): H01F1/047H01F41/02
CPCH01F1/047H01F41/0266
Inventor 不公告发明人
Owner SUZHOU NANER MATERIAL TECH CO LTD
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