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Method for preparing Sm-Co alloy magnetic material through electric dechloridation

A magnetic material, samarium-cobalt technology, which is applied in the field of preparing samarium-cobalt alloy magnetic materials, can solve the problems of easy cracks, complicated process, and high risk of samarium-cobalt alloy, and achieve the effect of low cost, simple and efficient process, and green metallurgy

Inactive Publication Date: 2017-01-11
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the technical problems of the existing samarium-cobalt alloy preparation method with high risk, complex process and easy internal cracks, and provides a method for preparing samarium-cobalt alloy magnetic material by electric dechlorination

Method used

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  • Method for preparing Sm-Co alloy magnetic material through electric dechloridation
  • Method for preparing Sm-Co alloy magnetic material through electric dechloridation
  • Method for preparing Sm-Co alloy magnetic material through electric dechloridation

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specific Embodiment approach 1

[0017] Specific embodiment one: a kind of method for preparing samarium-cobalt alloy magnetic material by electric dechlorination of the present embodiment is carried out according to the following steps:

[0018] 1. According to LiCl, KCl, SmCl 3 、CoCl 2 The mass ratio is (44~45):(44~45):(2~10):3 Weigh LiCl, KCl, SmCl 3 and CoCl 2 , first add LiCl and KCl to the electrolytic tank of the electrolytic furnace, heat and melt, and then add SmCl 3 and CoCl 2 , continue heating and melting to obtain LiCl-KCl-SmCl 3 -CoCl 2 electrolyte system;

[0019] 2. Using metal molybdenum as the working electrode and graphite as the auxiliary electrode, the electrolysis temperature is 640-850°C and the current is 1.55-5.90Acm -2 Under the conditions of electrolysis for 1 to 2 hours, the material deposited in the electrolytic cell is taken out, lowered to normal temperature, the solid phase is filtered out, washed and dried to obtain a samarium cobalt alloy magnetic material.

specific Embodiment approach 2

[0020] Specific embodiment two: the difference between this embodiment and specific embodiment one is that LiCl, KCl, SmCl in step one 3 、CoCl 2 The mass ratio is (44~45):(44~45):4:3. Others are the same as in the first embodiment.

[0021] The samarium-cobalt alloy obtained under the electrolyte ratio conditions of this embodiment is Sm 2 co 17 .

specific Embodiment approach 3

[0022] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that LiCl, KCl, SmCl in step one 3 、CoCl 2 The mass ratio is (44~45):(44~45):6:3. Others are the same as in the first or second embodiment.

[0023] The samarium-cobalt alloy obtained under the electrolyte ratio conditions of this embodiment is Sm 2 co 17 .

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Abstract

The invention provides a method for preparing a Sm-Co alloy magnetic material through electric dechloridation, relates to the method for preparing the Sm-Co alloy magnetic material, and aims to solve the technical problems that a conventional preparation method of the Sm-Co alloy is highly dangerous, the inside of the Sm-Co alloy is prone to cracking and impurities are easily introduced into the Sm-Co alloy. The method comprises steps as follows: step one, LiCl, KCl, SmCl3 and CoCl2 are heated and fused, a LiCl-KCl-SmCl3-CoCl2 electrolyte system is obtained; step two, molybdenum is taken as a working electrode and graphite is taken as an auxiliary electrode for electrolysis, substances deposited in an electrolytic bath are taken out and cooled to the room temperature, solid-phase substances are filtered out, washed and dried, and the Sm-Co alloy magnetic material is obtained. According to the method, the reactor temperature is low, the energy consumption is low, the content of Sm in the magnetic material is controlled through control of an electrolyte ratio, the inside of the Sm-Co alloy is defect-free, a permanent magnet material is high in magnetic anisotropy and coercivity, and the Sm-Co alloy can be taken as the magnetic material for application.

Description

technical field [0001] The invention relates to a method for preparing a samarium-cobalt alloy magnetic material. Background technique [0002] Samarium cobalt permanent magnet materials have high Curie temperature, superior comprehensive magnetic properties and good environmental stability. They are used in permanent magnet micro motors, high-end electric vehicles, turbomachinery, traveling wave light tube field magnets, desktop nuclear magnetic resonance spectrometers, etc. field has important applications. Samarium cobalt permanent magnet material has strong anti-corrosion and anti-oxidation properties, usually does not need coating and can be widely used in high temperature and harsh working conditions. Obvious magnetic anisotropy and strong coercive force are two very important indicators that distinguish permanent magnet materials from other magnetic materials. Samarium cobalt permanent magnet material has SmCo 5 and Sm 2 co 17 Two, SmCo 5 The storage energy rang...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/36
CPCC25C3/36
Inventor 颜永得柳玉辉张密林薛云景晓燕
Owner HARBIN ENG UNIV
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