High-coercivity samarium-cobalt permanent magnet material and preparation method thereof

A technology of permanent magnet materials and high coercive force, applied in the direction of magnetic materials, magnetic objects, electrical components, etc. The effect of domain magnetocrystalline anisotropy

Active Publication Date: 2016-03-02
HUNAN AEROSPACE MAGNET & MAGNETO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The Chinese patent application with the application number 201410532244.4 uses a solution method to prepare samarium cobalt powder, but this method is complicated in process and high in industrialization cost

Method used

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  • High-coercivity samarium-cobalt permanent magnet material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0032] The high coercive force samarium cobalt permanent magnet material of the present embodiment comprises main alloy and auxiliary alloy, and the mass ratio of main alloy and auxiliary alloy is 100:1; The chemical formula of main alloy is Sm 24.5% co 49.5% Fe 16.2% Cu 6.1% Zr 3.7% , the suballoy according to the chemical formula is Sm 20% Dy 60% Fe 20% .

[0033] The preparation method of the high-coercivity samarium-cobalt permanent magnet material in this embodiment is to prepare the samarium-cobalt permanent magnet through the double alloy method combined with the traditional powder metallurgy process, and prepare the main alloy and the auxiliary alloy, which specifically includes the following steps:

[0034] Steps (1), (2), and (3) are the preparation of the main alloy powder:

[0035] (1) Ingredients: main alloy according to chemical formula Sm 24.5% co 49.5% Fe 16.2% Cu 6.1% Zr 3.7% The mass percentage ingredients;

[0036] (2) Melting: Put the main allo...

Embodiment 2

[0047] The high coercive force samarium cobalt permanent magnet material of the present embodiment comprises main alloy and auxiliary alloy, and the mass ratio of main alloy and auxiliary alloy is 100:1; The chemical formula of main alloy is Sm 24.5% co 49.5% Fe 16.2% Cu 6.1% Zr 3.7% , the suballoy according to the chemical formula is Sm 20% Dy 60% Fe 20% .

[0048] The preparation method of the high-coercivity samarium-cobalt permanent magnet material in this embodiment is to prepare the samarium-cobalt permanent magnet through the double alloy method combined with the traditional powder metallurgy process, and prepare the main alloy and the auxiliary alloy, which specifically includes the following steps:

[0049] Steps (1), (2), and (3) are the preparation of the main alloy powder:

[0050] (1) Ingredients: main alloy according to chemical formula Sm 24.5% co 49.5% Fe 16.2% Cu 6.1% Zr 3.7% The mass percentage ingredients;

[0051] (2) Put the main alloy raw mat...

Embodiment 3

[0062] The high-coercivity samarium-cobalt permanent magnet material of the present embodiment comprises a main alloy and a secondary alloy, and the mass ratio of the main alloy and the secondary alloy is 100:3; the chemical formula of the main alloy is Sm 24.5% co 49.5% Fe 16.2% Cu 6.1% Zr 3.7% , the suballoy according to the chemical formula is Sm 20% Dy 60% Fe 20% .

[0063] The preparation method of the high-coercivity samarium-cobalt permanent magnet material in this embodiment is to prepare the samarium-cobalt permanent magnet through the double alloy method combined with the traditional powder metallurgy process, and prepare the main alloy and the auxiliary alloy, which specifically includes the following steps:

[0064] Steps (1), (2), and (3) are the preparation of the main alloy powder:

[0065] (1) The main alloy is according to the chemical formula Sm 24.5% co 49.5% Fe 16.2% Cu 6.1% Zr 3.7% The mass percentage ingredients;

[0066] (2) Put the main all...

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Abstract

The invention discloses a high-coercivity samarium-cobalt permanent magnet material and a preparation method thereof. The high-coercivity samarium-cobalt permanent magnet material comprises a main alloy and an auxiliary alloy, wherein a chemical formula of the main alloy is Sm<x>Co<y>Fe<z>Cu<w>Zr<bal>; x is smaller than or equal to 27% and greater than or equal to 24%; y is smaller than or equal to 55% and greater than or equal to 45%; z is smaller than or equal to 20% and greater than or equal to 15%; w is smaller than or equal to 10% and greater than or equal to 4%; the chemical formula of the auxiliary alloy is NMFe<c>; N represents one or a mixture of light rare earth elements Sm, Pr and Nd; M is one or the mixture of heavy rare earth elements Dy and Tb; a is smaller than or equal to 25% and greater than or equal to 20%; b is smaller than or equal to 65% and greater than or equal to 60%; c is smaller than or equal to 20% and greater than or equal to 15%; and meanwhile, Dy<2>O<3> powder which is equivalent to 0.1%-0.5% of the weight of the main alloy is added. According to the high-coercivity samarium-cobalt permanent magnet material, growth of crystal particles in a sintering process can be prevented; the crystal particles of a samarium-cobalt alloy are refined; and improvement of the coercivity is facilitated; and continuously adjustable coercivity can be achieved by proportioning the main alloy and the auxiliary alloy with different ratios.

Description

technical field [0001] The invention relates to a samarium cobalt permanent magnet material and a preparation method thereof, in particular to a high coercivity samarium cobalt permanent magnet material and a preparation method thereof. Background technique [0002] Sintered samarium cobalt permanent magnet materials, because of their excellent magnetic properties, especially high coercive force and low temperature coefficient, good high temperature resistance and corrosion resistance, are widely used in many fields, especially in high temperature environments application. Traditional SM 2 co 17 The main components of samarium-cobalt permanent magnet materials are samarium, cobalt, iron, copper, and zirconium. Generally, the operating temperature does not exceed 400-450°C. If the operating temperature is further increased, the coercive force and magnetic energy product will decrease sharply. In order to further increase the service temperature of the samarium cobalt perma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/053C22C19/07C22C1/04C22C1/02
Inventor 罗明谭春林王涛肖磊
Owner HUNAN AEROSPACE MAGNET & MAGNETO
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