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Ultralow-demagnetization-rate high-temperature samarium-cobalt permanent magnet material and preparation method thereof

A permanent magnet material, high temperature technology, used in magnetic materials, permanent magnet manufacturing, inductor/transformer/magnet manufacturing, etc., can solve problems such as poor high temperature stability and high high temperature demagnetization rate

Pending Publication Date: 2020-10-30
HANGZHOU PERMANENT MAGNET GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problem of high high-temperature demagnetization rate and poor high-temperature stability of samarium-cobalt permanent magnets in the prior art, the purpose of this application is to provide an ultra-low demagnetization rate high-temperature samarium-cobalt permanent magnet material and its preparation method

Method used

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  • Ultralow-demagnetization-rate high-temperature samarium-cobalt permanent magnet material and preparation method thereof
  • Ultralow-demagnetization-rate high-temperature samarium-cobalt permanent magnet material and preparation method thereof
  • Ultralow-demagnetization-rate high-temperature samarium-cobalt permanent magnet material and preparation method thereof

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Embodiment 1

[0034] A samarium-cobalt permanent magnet material for high temperature with ultra-low demagnetization rate, the chemical atomic measurement formula of the samarium-cobalt permanent magnet material is Sm(Co 1-x-y-v Fe x Cu y Zr v ) z , where x=0.10, y=0.13, v=0.034, z=8.0.

[0035] The preparation method of the samarium cobalt permanent magnet material comprises the following steps:

[0036] Step 1: Ingredients and Melting

[0037] Sm with a purity of 99.95%, Co with a purity of 99.98%, Cu with a purity of 99.99%, Fe with a purity of 99.9%, and Zr with a purity of 99.99% are mixed according to the proportion, and the raw materials are put into a vacuum induction melting furnace, and the Sm is placed at the bottom of the vacuum induction melting furnace to reduce the volatilization of Sm during the smelting process, first vacuumize to 3×10 -3 After Pa, fill it with argon to keep the vacuum at -0.05MPa, and melt it under the conditions of working voltage of 45V and working...

Embodiment 2

[0051] A samarium-cobalt permanent magnet material for high temperature with ultra-low demagnetization rate, the chemical atomic measurement formula of the samarium-cobalt permanent magnet material is Sm(Co 1-x-y-v Fe x Cu y Zr v ) z , where x=0.10, y=0.13, v=0.034, z=8.0.

[0052] The preparation method of the samarium cobalt permanent magnet material comprises the following steps:

[0053] Step 1: Ingredients and Melting

[0054] Sm with a purity of 99.95%, Co with a purity of 99.98%, Cu with a purity of 99.99%, Fe with a purity of 99.9%, and Zr with a purity of 99.99% are mixed according to the proportion, and the raw materials are put into a vacuum induction melting furnace, and the Sm is placed at the bottom of the vacuum induction melting furnace to reduce the volatilization of Sm during the smelting process, first vacuumize to 3×10 -3 After Pa, fill it with argon to keep the vacuum at -0.05MPa, and melt it under the conditions of working voltage of 45V and working...

Embodiment 3

[0067] A samarium-cobalt permanent magnet material for high temperature with ultra-low demagnetization rate, the chemical atomic measurement formula of the samarium-cobalt permanent magnet material is Sm(Co 1-x-y-v Fe x Cu y Zr v ) z , where x=0.13, y=0.13, v=0.038, z=8.1.

[0068] The preparation method of the samarium cobalt permanent magnet material comprises the following steps:

[0069] Step 1: Ingredients and Melting

[0070] Sm with a purity of 99.95%, Co with a purity of 99.98%, Cu with a purity of 99.99%, Fe with a purity of 99.9%, and Zr with a purity of 99.99% are mixed according to the proportion, and the raw materials are put into a vacuum induction melting furnace, and the Sm is placed at the bottom of the vacuum induction melting furnace to reduce the volatilization of Sm during the smelting process, first vacuumize to 3×10 -3 After Pa, fill it with argon to keep the vacuum at -0.05MPa, and melt it under the conditions of working voltage of 45V and working...

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Abstract

The invention discloses an ultralow-demagnetization-rate high-temperature samarium-cobalt permanent magnet material and a preparation method thereof. The stoichiometric formula of the samarium-cobaltpermanent magnet material is Sm(Co1-x-y-vFexCuyZrv)z, wherein x is equal to 0.09-0.13, y is equal to 0.12-0.18, v is equal to 0.033-0.04, z is equal to 7.69-8.3, and z is the ratio of the total atomicweight of the transition group elements Co, Fe, Cu and Zr to the atomic weight of the rare earth element Sm. The samarium-cobalt permanent magnet material prepared by the method is good in high-temperature resistance, and has extremely low demagnetization rate at the use temperature of 500 DEG C.

Description

technical field [0001] The invention relates to the field of samarium-cobalt permanent magnet materials, in particular to a samarium-cobalt permanent magnet material for ultra-low demagnetization rate and high temperature and a preparation method thereof. Background technique [0002] Compared with sintered NdFeB, sintered SmCo not only has excellent magnetic properties, but also has corrosion resistance and high temperature resistance and good high temperature stability. The research and development of samarium cobalt permanent magnet materials worldwide has been increasing continuously, and the research level of samarium cobalt permanent magnet materials in China is also improving year by year. Therefore, the high-temperature application conditions of permanent magnet materials are continuously improved, and the application temperature is required to be greater than 400°C. Samarium-cobalt permanent magnet has a large anisotropy field and a high Curie temperature, so it ha...

Claims

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Application Information

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IPC IPC(8): H01F1/055H01F41/02
CPCH01F1/0557H01F1/0552H01F41/026H01F41/0266H01F41/0253
Inventor 赵宇徐道兵樊金奎冯建涛王栋凌棚生
Owner HANGZHOU PERMANENT MAGNET GRP
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