A kind of high toughness magnetic material and preparation method thereof

Abstract

The invention discloses high tenacity magnetic materials and a preparation method of the high tenacity magnetic materials. The component percentages of the high tenacity magnetic materials comprise, by weight, 28-38% of neodymium (Nd), 2.8-3.8% of praseodymium (Pr), 1-4% of boron (B), 0.09-0.198% of tantalum (Ta), 0.08-0.176 % of hafnium (Hf), 0.02-0.044 % of wolfram (W) and 0.028-0.038% of scandium (Sc), and the rest is ferrum (Fe). The high tenacity magnetic materials have uniform textures and strong structures, and can not only improve tenacity performance of the materials but also improve magnetic performance. The preparation method fully utilizes praseodymium-neodymium waste materials to directly produce raw materials for alloy, is flexible in composition proportion, qualified in quality control, capable of reducing cost and simple in technology, and fully utilizes waste powder materials with high oxygen content.

Description

technical field

[0001] The invention belongs to the field of functional materials, and relates to a high-toughness magnetic material and a preparation method. Background technique

[0002] Application No. 201210241995.1 discloses a method for extracting rare earths from oxidized NdFeB waste, the steps of which are: mixing NdFeB waste with water and then grinding: oxidizing the ground NdFeB waste; Grinding; acid leaching; solid-liquid separation; extraction of iron; rare earth chloride; extraction of rare earth; extraction of aluminum; precipitation; Applying this method to recover rare earths increases the recovery rate of rare earths by 5-8%; and the use value of the recovered rare earths is improved, which reduces the production cost of further processing: effectively solves the "mud" of molten salt in the electrolysis of single rare earths The problem is to improve the electrolysis efficiency of rare earth metals during electrolysis and effectively reduce power consumpti...

Examples

Embodiment 1

[0029] Prepare the high toughness magnetic material according to the following steps:

[0030]1) Treatment of praseodymium and neodymium waste: place praseodymium and neodymium waste in hydrochloric acid with a mass concentration of 25% and mix them, the mass ratio of praseodymium and neodymium waste to hydrochloric acid is 1:2.0, then add oxalic acid to the hydrochloric acid mixture and stir evenly, the oxalic acid and hydrochloric acid mixture The weight ratio was 2.5:1. The precipitate collected after 1 hour was dried at a temperature of 120° C. for 1 hour, and then kept at a temperature of 1050° C. for 1.5 hours to obtain a precipitated rare earth oxide.

[0031] 2) Grinding ingredients: determine the content of Nd, Pr and Sc on the precipitated rare earth oxide, add praseodymium oxide powder, neodymium oxide powder and scandium oxide powder to the precipitated rare earth oxide after the measurement to adjust the composition, the adjusted rare earth oxide precipitate The w...

Embodiment 2

[0038] Prepare the high toughness magnetic material according to the following steps:

[0039] 1) Treatment of praseodymium and neodymium waste: place praseodymium and neodymium waste in hydrochloric acid with a mass concentration of 30% and mix them, the mass ratio of praseodymium and neodymium waste to hydrochloric acid is 1:2.0, then add oxalic acid to the hydrochloric acid mixture and stir evenly, the oxalic acid and hydrochloric acid mixture The weight ratio is 2.5:1. The precipitate collected after 1.5 hours was dried at 120°C for 1 hour, and then kept at 1100°C for 1 hour to obtain the precipitated rare earth oxide.

[0040] 2) Grinding ingredients: determine the content of Nd, Pr and Sc on the precipitated rare earth oxide, add praseodymium oxide powder, neodymium oxide powder and scandium oxide powder to the precipitated rare earth oxide after the measurement to adjust the composition, the adjusted rare earth oxide precipitate The weight ratio of the three components ...

Embodiment 3

[0047] When preparing the NdFeB alloy ingot in step 4), the ingredients are distributed according to the following weight percentages: Nd 33%, Pr 3.3%, B 3%, Ta 0.144%, Hf 0.128%, W 0.032%, Sc 0.033%, and the rest is Fe .

[0048] All the other preparation processes are the same as in Example 1.

technical field

[0001] The invention belongs to the field of functional materials, and relates to a high-toughness magnetic material and a preparation method. Background technique

[0002] Application No. 201210241995.1 discloses a method for extracting rare earths from oxidized NdFeB waste, the steps of which are: mixing NdFeB waste with water and then grinding: oxidizing the ground NdFeB waste; Grinding; acid leaching; solid-liquid separation; extraction of iron; rare earth chloride; extraction of rare earth; extraction of aluminum; precipitation; Applying this method to recover rare earths increases the recovery rate of rare earths by 5-8%; and the use value of the recovered rare earths is improved, which reduces the production cost of further processing: effectively solves the "mud" of molten salt in the electrolysis of single rare earths The problem is to improve the electrolysis efficiency of rare earth metals during electrolysis and effectively reduce power consumpti...

Examples

Embodiment 1

[0029] Prepare the high toughness magnetic material according to the following steps:

[0030]1) Treatment of praseodymium and neodymium waste: place praseodymium and neodymium waste in hydrochloric acid with a mass concentration of 25% and mix them, the mass ratio of praseodymium and neodymium waste to hydrochloric acid is 1:2.0, then add oxalic acid to the hydrochloric acid mixture and stir evenly, the oxalic acid and hydrochloric acid mixture The weight ratio was 2.5:1. The precipitate collected after 1 hour was dried at a temperature of 120° C. for 1 hour, and then kept at a temperature of 1050° C. for 1.5 hours to obtain a precipitated rare earth oxide.

[0031] 2) Grinding ingredients: determine the content of Nd, Pr and Sc on the precipitated rare earth oxide, add praseodymium oxide powder, neodymium oxide powder and scandium oxide powder to the precipitated rare earth oxide after the measurement to adjust the composition, the adjusted rare earth oxide precipitate The w...

Embodiment 2

[0038] Prepare the high toughness magnetic material according to the following steps:

[0039] 1) Treatment of praseodymium and neodymium waste: place praseodymium and neodymium waste in hydrochloric acid with a mass concentration of 30% and mix them, the mass ratio of praseodymium and neodymium waste to hydrochloric acid is 1:2.0, then add oxalic acid to the hydrochloric acid mixture and stir evenly, the oxalic acid and hydrochloric acid mixture The weight ratio is 2.5:1. The precipitate collected after 1.5 hours was dried at 120°C for 1 hour, and then kept at 1100°C for 1 hour to obtain the precipitated rare earth oxide.

[0040] 2) Grinding ingredients: determine the content of Nd, Pr and Sc on the precipitated rare earth oxide, add praseodymium oxide powder, neodymium oxide powder and scandium oxide powder to the precipitated rare earth oxide after the measurement to adjust the composition, the adjusted rare earth oxide precipitate The weight ratio of the three components ...

Embodiment 3

[0047] When preparing the NdFeB alloy ingot in step 4), the ingredients are distributed according to the following weight percentages: Nd 33%, Pr 3.3%, B 3%, Ta 0.144%, Hf 0.128%, W 0.032%, Sc 0.033%, and the rest is Fe .

[0048] All the other preparation processes are the same as in Example 1.

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