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Electrodeposition method, electrodeposition solution and method for preparation of rare earth permanent magnetic material by electrodeposition

A technology of electrodeposition and surface deposition, which is applied in the direction of magnetic materials, inductor/transformer/magnet manufacturing, circuits, etc., can solve problems that are not suitable for industrial production, and achieve the effects of stable solution, high ion conductivity, and wide electrochemical window

Inactive Publication Date: 2016-08-10
BEIJING ZHONG KE SAN HUAN HI TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it is also not suitable for industrial production

Method used

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  • Electrodeposition method, electrodeposition solution and method for preparation of rare earth permanent magnetic material by electrodeposition
  • Electrodeposition method, electrodeposition solution and method for preparation of rare earth permanent magnetic material by electrodeposition
  • Electrodeposition method, electrodeposition solution and method for preparation of rare earth permanent magnetic material by electrodeposition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] The cathode material in this example is: D7x3㎜R 2 FeMB (Neodymium Iron Boron) magnetic material, 10x10x1㎜ platinum sheet for anode. Electrodeposition liquid comprises the main salt that contains heavy rare earth element, the induction salt that induces heavy rare earth element deposition and the organic ionic liquid as solvent; Described main salt is the tetrafluoroborate of heavy rare earth element; In electrodeposition liquid, Tb( BF 4 ) 3 is 1mol / L, Fe(BF 4 ) 2 is 1.2mol / L, Co(BF 4 ) 2 0.6mol / L, the ionic liquid is 1-butyl-3-methylimidazolium tetrafluoroborate [EMIM]BF 4 . The electroplating conditions are: temperature 50°C, 1.9V constant voltage, electroplating time 300min, to obtain Fe-Co-Tb coating, such as figure 1 Shown; EDS analysis of its surface, the results are shown in Table 1.1. The heat treatment process is 900°C, cooling after holding for 150 minutes, then tempering at 480°C, cooling after holding for 150 minutes, the same heat treatment process...

Embodiment 2

[0070] The cathode material in this example is: D7x3㎜R 2 FeMB (Neodymium Iron Boron) magnetic material, 10x10x1㎜ platinum sheet for anode. Electrodeposition liquid comprises the main salt that contains heavy rare earth element, the induction salt that induces heavy rare earth element deposition and the organic ionic liquid as solvent; Described main salt is the tetrafluoroborate of heavy rare earth element; In electrodeposition liquid, Tb( BF 4 ) 3 is 0.5mol / L, Fe(BF 4 ) 2 is 1mol / L, Co(BF 4 ) 2 The 0.5mol / L ionic liquid is N-methylethylpyrrolidine tetrafluoroborate. The electroplating conditions are as follows: a temperature of 0°C, a constant voltage of 0.5V, and an electroplating time of 500 minutes to obtain a Fe-Co-Tb coating. The heat treatment process is 820 °C, cooling after 24 hours of heat preservation, and then tempering at 540 °C, cooling after heat preservation for 1 hour, and electrodeposited to R by the method of this example. 2 On the surface of FeMB, a...

Embodiment 3

[0074]The cathode material in this example is: D7x3㎜R 2 FeMB (Neodymium Iron Boron) magnetic material, 10x10x1㎜ platinum sheet for anode. Electrodeposition liquid comprises the main salt that contains heavy rare earth element, the induction salt that induces heavy rare earth element deposition and the organic ionic liquid as solvent; Described main salt is the tetrafluoroborate of heavy rare earth element; In electrodeposition liquid, Tb( BF 4 ) 3 is 0.2mol / L, Fe(BF 4 ) 2 0.5mol / L, Co(BF 4 ) 2 is 0.1mol / L, and the ionic liquid is 1-ethyl-3 methylimidazole bis-trifluoromethanesulfonimide salt. The electroplating conditions are as follows: a temperature of 200° C., a constant voltage of 2 V, and an electroplating time of 350 minutes to obtain a Fe-Co-Tb coating. The heat treatment process is 920 ° C, cooling after holding for 1 hour, then tempering at 480 ° C, cooling after holding for 10 hours, and electrodepositing to R by the method of this example. 2 On the surface o...

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Abstract

The invention discloses an electrodeposition method, an electrodeposition solution and a method for preparation of a rare earth permanent magnetic material by electrodeposition. Being used for deposition of heavy rare earth elements on an R<2>-T-B type sintered mother alloy surface, the method comprises the steps of: 1. providing an electrodeposition solution, which comprises a heavy rare earth element containing main salt, an induction salt inducing heavy rare earth element deposition and an organic ionic liquid serving as the solvent, wherein the main salt is a tetrafluoroborate of heavy rare earth element; and 2. subjecting the R<2>-T-B type sintered mother alloy to electroplating in the electrodeposition solution, and controlling the temperature of the electroplating process at 0-200DEG C. According to the invention, heavy rare earth elements can deposit rapidly on the R<2>-T-B type sintered mother alloy surface, thus saving the electrodeposition process time and improving the production efficiency. The plating layer thickness is larger and can reach 10-40 micrometers.

Description

technical field [0001] The invention belongs to the technical field of production methods of rare earth permanent magnet materials, and in particular relates to an electrodeposition liquid and a production method of a sintered R-T-B magnet with heavy rare earth elements attached by electrodeposition. Background technique [0002] Due to the demand for energy-saving motors in automotive and electronic applications, the application of sintered NdFeB, which is widely used in VCM, motors, signal generators, mobile phones and MRI, has been further expanded in the motor market. The improvement of magnetic properties such as remanence and coercive force promotes the rapid growth of sintered magnets in the motor market. [0003] Rare-earth iron-based permanent magnet materials represented by NdFeB are currently the new generation of permanent magnet materials with the highest magnetic performance (energy density), the widest application and the fastest development speed. Adding a c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/54H01F1/057
CPCH01F1/057C25D3/665H01F41/0293C25D3/54
Inventor 陈鹏姜兵宁红
Owner BEIJING ZHONG KE SAN HUAN HI TECH
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