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Iron-nickel co-doped SmCo4B-based permanent magnet ribbon and preparation method thereof

A co-doping and thin strip technology, which is applied in the manufacture of inductors/transformers/magnets, magnetic objects, magnetic materials, etc., can solve problems that have not yet appeared, and achieve the effect of improving coercive force and magnetization, and good comprehensive magnetic properties

Pending Publication Date: 2022-07-15
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In summary, one of the most effective ways to prepare Sm-Co compounds is to melt the as-cast master alloy and then heat treat it. At present, the method of adding Fe and Cu elements to replace part of Co 4 B-based permanent magnet strips have hard magnetic properties, while SmCo as the main phase 4 The anisotropy field of B is as high as 1200kOe, and the prepared SmCo 4 The coercivity of B-based permanent magnet strips should have ultra-high coercivity, but so far there has not been a SmCo with high coercivity and high magnetization over 50kOe at room temperature. 4 Reports on B-based thin strip alloy materials, but the magnetic properties of thin strips still need to be further improved

Method used

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  • Iron-nickel co-doped SmCo4B-based permanent magnet ribbon and preparation method thereof
  • Iron-nickel co-doped SmCo4B-based permanent magnet ribbon and preparation method thereof
  • Iron-nickel co-doped SmCo4B-based permanent magnet ribbon and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] SmCo 4 SmCo of B-based permanent magnetic strip 3.5 Fe 0.38 Ni 0.12 Method for the preparation of B thin strips.

[0060] The first step, raw material preparation:

[0061] Calculate the elemental composition formula SmCo according to the atomic ratio (that is, the molar ratio between elements) 3.5 Fe 0.38 Ni 0.12 The mass percentage of the constituent elements in B, according to the mass percentage, weigh the required amount of component raw materials: pure Sm, pure Co, pure Fe, pure Ni and B-Co alloy. 3% pure Sm than the calculated mass percentage of pure Sm, thereby completing the preparation of raw materials;

[0062] The second step is to melt the raw material to prepare the master alloy ingot:

[0063] Put the raw materials prepared in the first step into the crucible of the vacuum arc melting furnace at the same time, and vacuum the furnace body to 3×10 during melting. -3 Pa, the furnace temperature is raised to 50°C higher than the melting point of pure...

Embodiment 2

[0072] SmCo 4 SmCo of B-based permanent magnetic strip 3.0 Fe 0.8 Ni 0.2 Method for the preparation of B thin strips.

[0073] The first step, raw material preparation:

[0074] Calculate the elemental composition formula SmCo according to the atomic ratio 3.0 Fe 0.8 Ni 0.2 The mass percentage of the constituent elements in B, according to the mass percentage, weigh the required amount of component raw materials: pure Sm, pure Co, pure Fe, pure Ni and pure B powder, and additionally add according to the above-mentioned raw material ratio during batching. Weigh pure Sm with a mass percentage of 5% of pure Sm, thereby completing the preparation of raw materials;

[0075] The second step is to melt the raw material to prepare the master alloy ingot:

[0076] Put the B powder prepared in the first step into the silo separately, and put other raw materials into the crucible of the vacuum induction melting furnace at the same time. During the melting, the furnace body is fir...

Embodiment 3

[0084] SmCo 4 SmCo of B-based permanent magnetic strip 2.2 Fe 1.2 Ni 0.6 Method for the preparation of B thin strips.

[0085] The first step, raw material preparation:

[0086] Calculate the elemental composition formula SmCo according to the atomic ratio 2.2 Fe 1.2 Ni 0.6 The mass percentage of the constituent elements in B, according to the mass percentage, weigh the required amount of component raw materials: pure Sm, pure Co, pure Fe, pure Ni and B-Co alloy, and additionally add the above-mentioned raw materials when batching. The pure Sm with a mass percentage of 6% of pure Sm is taken, thereby completing the preparation of raw materials;

[0087] The second step is to melt the raw material to prepare the master alloy ingot:

[0088] Put the raw materials prepared in the first step into the crucible of the vacuum induction melting furnace at the same time, and vacuum the furnace body to 4×10 before melting. -2 Pa, the furnace temperature rises to 180°C higher th...

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Abstract

The invention relates to an iron-nickel co-doped SmCo4B-based permanent magnet ribbon and a preparation method thereof. The element composition formula of the material is SmCoxFeyNizB, subscript symbols x, y and z in the formula represent molar ratio numbers of limited elements among the elements, and the symbols for limiting the element composition range meet the following conditions: x + y + z = 4, x = 1-3.5, y = 0.2-2.0 and z = 0.12-1.2. According to the stable SmCo4B-based permanent magnet ribbon prepared by the method disclosed by the invention, the intrinsic coercive force is 39.6 kOe to 88.8 kOe and the residual magnetism is 18.4 emu / g to 63.8 emu / g at room temperature under the condition that an external magnetic field is 90kOe, and the maximum magnetization intensity is 20.2 emu / g to 83.7 emu / g under the magnetic field of 90kOe, so that the room-temperature coercive force and the magnetization intensity of the SmCo4B-based permanent magnet ribbon prepared by the method disclosed by the invention are far higher than those of the SmCo4B-based permanent magnet ribbon prepared by the prior art.

Description

technical field [0001] The technical scheme of the present invention relates to a magnet of a hard magnetic material containing rare earth metals and magnetic transition metals, in particular to an iron-nickel co-doped SmCo 4 B-based permanent magnetic thin strip and preparation method thereof. Background technique [0002] Rare earth permanent magnet materials refer to permanent magnet materials based on intermetallic compounds formed by rare earth elements such as Pr, Nd, Sm and transition metal elements such as Fe and Co. Permanent magnet materials have been widely used in all walks of life. Rare earth permanent magnet materials have experienced SmCo 5 , Sm 2 Co 17 , Nd 2 Fe 14 The development of the three generations of B, in which Nd-Fe-B permanent magnets have the largest magnetic energy product, and Sm-Co magnets are rare earth permanent magnets with the highest use temperature, their magnetic energy products are close to the theoretical limit, and the developme...

Claims

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Application Information

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IPC IPC(8): H01F1/057H01F1/055H01F41/02
CPCH01F1/057H01F1/055H01F41/0253
Inventor 孙继兵王舒
Owner HEBEI UNIV OF TECH
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