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Preparation process of slurry for screen printing of sintered NdFeB (neodymium iron boron)

A technology of screen printing and production process, which is applied in the field of slurry production process for sintered NdFeB screen printing, which can solve the problems of long drying time, difficulty in industrial production, and easy falling off of ink, etc., and achieves short drying time and good slurry The effect of strong material adhesion and enhanced coercive force

Inactive Publication Date: 2021-12-03
ANHUI HANHAI NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Commonly used substrates in the prior art include substrates such as glass, paper, plastic, and metal. Solvent-based inks are mainly used. The inks are mainly prepared by mixing resins, pigments, solvents, and additives. Various patterns and characters are printed on the substrate, but this type of ink is easy to fall off after printing, the drying time is too long, and it is not easy for industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Grind 2 parts of dysprosium fluoride and 2 parts of terbium hydride into powder and mix them uniformly to obtain a powder mixture. Dissolve the above powder mixture in 55 parts of absolute ethanol, then add 6 parts of propylene glycol block polyether and 8 parts of Acrylic resin, made of heavy rare earth suspension slurry;

[0034] (2) The heavy rare earth suspension slurry was printed on the surface of the sintered NdFeB magnet through a fixed pattern, diffused at 800°C for 3h, and then tempered at 450°C for 4h.

Embodiment 2

[0036] (1) Grind 2 parts of dysprosium fluoride and 4 parts of terbium hydride into powder and mix them uniformly to obtain a powder mixture. Dissolve the above powder mixture in 60 parts of absolute ethanol, then add 6 parts of propylene glycol block polyether and 12 parts of Acrylic resin, made of heavy rare earth suspension slurry;

[0037] (2) The heavy rare earth suspension slurry was printed on the surface of the sintered NdFeB magnet through a fixed pattern, diffused at 850°C for 3h, and then tempered at 480°C for 4h.

Embodiment 3

[0039] (1) Grind 4 parts of dysprosium fluoride and 4 parts of terbium hydride into powder and mix them uniformly to obtain a powder mixture. Dissolve the above powder mixture in 66 parts of absolute ethanol, then add 6 parts of propylene glycol block polyether and 16 parts of Acrylic resin, made of heavy rare earth suspension slurry;

[0040] (2) The heavy rare earth suspension slurry was printed on the surface of the sintered NdFeB magnet through a fixed pattern, diffused at 850°C for 3h, and then tempered at 480°C for 4h.

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Abstract

The invention provides a preparation process of slurry for screen printing of sintered NdFeB (neodymium iron boron), and relates to the technical field of screen printing. The process comprises the following steps: crushing fluoride R1F3 and hydride R2H3 into powder, uniformly conducting mixing to obtain a powder mixture, dissolving the powder mixture into a solvent, and then sequentially adding a defoaming agent and macromolecular resin to prepare the heavy rare earth suspension slurry. The slurry prepared by the process has the advantages of strong adhesive force, short drying time after printing, no screen printing plate blockage in printing, substantial improvement of the coercive force of neodymium iron boron, realization of the effects of magnetron sputtering and coating, low equipment cost, and suitableness for industrial batch production.

Description

technical field [0001] The invention relates to the technical field of screen printing, in particular to a slurry preparation process for sintered NdFeB screen printing. Background technique [0002] Screen printing belongs to stencil printing, using mesh glue to seal the excess mesh area, leaving the required graphics or text, and printing the ink on the substrate through the holes of the stencil under a certain pressure to form the desired image or text . Screen printing is cheap and has a relatively long shelf life. It is recognized by more and more industries and has a wide range of applications. [0003] Commonly used substrates in the prior art include substrates such as glass, paper, plastic, and metal. Solvent-based inks are mainly used. The inks are mainly prepared by mixing resins, pigments, solvents, and additives. Various patterns and characters are printed on the substrate, but this type of ink is easy to fall off after printing, the drying time is too long, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/107C09D11/03
CPCC09D11/107C09D11/03
Inventor 张震刘竞成徐娟陈翔
Owner ANHUI HANHAI NEW MATERIAL
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