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High-performance samarium-cobalt magnetic powder and preparation method thereof

A high-performance, samarium-cobalt technology, applied in the direction of magnetic materials, magnetic objects, inorganic materials, etc., to achieve the effect of promoting consistency, reducing magnetic loss, and increasing filling volume

Active Publication Date: 2012-07-04
BEIKUANG MAGNETS FUYANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The 2:17 type samarium cobalt permanent magnet material is one of the most excellent permanent magnet materials; it not only has a high magnetic energy product (magnetic energy product is one of the key technical indicators of permanent magnetic materials, it is used to represent the The total stored energy of permanent magnetic materials in the externally generated magnetic field, and its common unit is MGOe or kJ / m 3 ; Under the existing technical conditions, the magnetic energy product of 2:17 type samarium cobalt permanent magnet material is usually between 8MGOe~30MGOe) and reliable intrinsic coercivity (intrinsic coercivity is one of the key technical indicators of permanent magnet materials 1. It is used to indicate the ability of a magnet to maintain a permanent magnet. The common unit is kOe or kA / m; under the existing technical conditions, the intrinsic coercive force of the 2:17 type samarium cobalt permanent magnet material is usually greater than 15kOe), and has Higher Curie temperature (Curie temperature refers to the temperature at which the spontaneous magnetization in the magnetic material drops to zero. The higher the Curie temperature, the stronger the high temperature resistance of the magnet, and the stronger the ability to maintain magnetism at high temperatures ; Under the existing technical conditions, the Curie temperature of 2:17 type samarium cobalt permanent magnet material is usually 670 ℃ ~ 850 ℃), so it is irreplaceably used in space exploration aircraft, radar communication system, ship power system, artificial satellite and many other high-end military fields

Method used

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  • High-performance samarium-cobalt magnetic powder and preparation method thereof
  • High-performance samarium-cobalt magnetic powder and preparation method thereof
  • High-performance samarium-cobalt magnetic powder and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0099] As shown in Example 1 in Table 2, a high-performance samarium-cobalt magnetic powder has components including Sm, Co, Fe, Cu, Zr, Gd, V and Cr, and the mass fractions of each component in the total are: Sm accounts for 22 wt%, Co accounts for 47.5 wt%, Fe accounts for 20 wt%, Cu accounts for 5 wt%, Zr accounts for 3 wt%, Gd accounts for 1 wt%, V accounts for 1 wt%, and Cr accounts for 0.5 wt%. The specific preparation process of the high-performance samarium-cobalt magnetic powder includes the following steps:

[0100] In step a, according to the distribution scheme of the samarium cobalt magnetic powder composition listed in Example 1 in Table 2, select Sm, Co, Fe, Cu, Zr, Gd, V and Cr for batching. Wherein, each component in the above-mentioned proportioning scheme should be a pure raw material with an impurity content of no more than 0.01 wt%, so as to avoid the actual component content deviating from the above-mentioned proportioning scheme, so when selecting the ra...

Embodiment 2

[0120] As shown in Example 2 in Table 2, a high-performance samarium-cobalt magnetic powder has components including Sm, Co, Fe, Cu, Zr, Er, Mn and Cr, and the mass fractions of each component in the total are: Sm accounts for 26 wt%, Co accounts for 48.5 wt%, Fe accounts for 16 wt%, Cu accounts for 6 wt%, Zr accounts for 2 wt%, Er accounts for 0.5 wt%, Mn accounts for 0.5 wt%, and Cr accounts for 0.5 wt%. The specific preparation method of the high-performance samarium-cobalt magnetic powder is consistent with the samarium-cobalt magnetic powder method described in Example 1.

[0121] Multiple comparative experiments show that: as shown in Table 4 and image 3 As shown, scheme C adopts the samarium-cobalt magnetic powder composition ratio scheme and samarium-cobalt magnetic powder preparation method provided in this example; the samarium-cobalt magnetic powder composition ratio scheme of scheme D is the same as scheme C, but the samarium-cobalt magnetic powder preparation met...

Embodiment 3

[0126] As shown in Example 3 in Table 2, a high-performance samarium-cobalt magnetic powder has components including Sm, Co, Fe, Cu, Zr, Ho, Mn and V, and the mass fractions of each component in the total are: Sm accounts for 25 wt%, Co accounts for 47.6 wt%, Fe accounts for 20 wt%, Cu accounts for 5 wt%, Zr accounts for 1 wt%, Ho accounts for 0.4 wt%, Mn accounts for 0.3 wt%, and V accounts for 0.7 wt%. The specific preparation method of the high-performance samarium-cobalt magnetic powder is consistent with the samarium-cobalt magnetic powder method described in Example 1.

[0127] Multiple comparative experiments show that: as shown in Table 5, Figure 4 and Figure 5 As shown, scheme F adopts the composition ratio scheme of samarium cobalt magnetic powder and the preparation method of samarium cobalt magnetic powder provided in this embodiment; the composition ratio scheme of samarium cobalt magnetic powder of scheme G is the same as scheme F, and the preparation method o...

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Abstract

The invention discloses high-performance samarium-cobalt magnetic powder and a preparation method thereof. The general formula is as follows: Sm.alpha.Co. 1-alpha-gamma-delta-psi-omega.Fe.gamma.M.delta.Q.psi.R.omega., and the balance of Co wherein M is at least one of Cu or Zr; Q is at least one of Er, Gd, Dy or Ho; R is at least one of V, Cr, Mn, Sr, Al or Cs; alpha is greater than 20 wt percent and less than 28 wt percent; gamma is greater than 14 wt percent and less than 25 wt percent; delta is greater than 0.5 wt percent and less than 15 wt percent; psi is greater than 0.1 wt percent and less than 5 wt percent; and omega is greater than 0.1 wt percent and is less than 5 wt percent. Due to the composition, the consistency of columnar crystals growth can be promoted, so that the performances of the samarium-cobalt magnetic powder are improved; and the preparation method comprises the following steps of: compounding, smelting, pouring, sintering, solutioning, crushing, aging, adjusting granularity, and the like, so that the magnetic powder with the granularity in bimodal distribution can be prepared, the filler content of the magnetic powder is favored to be improved, and performances of the prepared samarium-cobalt magnetic powder are improved.

Description

technical field [0001] The invention relates to the field of magnetic materials, in particular to a high-performance samarium-cobalt magnetic powder and a preparation method thereof. Background technique [0002] With the improvement of scientific and technological level, permanent magnet materials have been widely used, and permanent magnet materials can be found in many fields such as machinery, electronics, instrumentation, medical treatment, military affairs, and aviation. The 2:17 type samarium cobalt permanent magnet material is one of the most excellent permanent magnet materials; it not only has a high magnetic energy product (magnetic energy product is one of the key technical indicators of permanent magnetic materials, it is used to represent the The total stored energy of permanent magnetic materials in the external magnetic field, the common unit is MGOe or kJ / m 3 ; Under the existing technical conditions, the magnetic energy product of 2:17 type samarium cobalt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/047H01F1/06C22C19/07C22C30/00B22F1/00B22F9/04
Inventor 邹科滕阳民王明军刘冬要继忠吕宝顺
Owner BEIKUANG MAGNETS FUYANG CO LTD
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