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A kind of preparation method of magnetic material

A technology of magnetic materials and magnetic properties, applied in the field of preparation of magnetic materials, can solve the problems of limited application range, low product surface density, smoothness, poor corrosion resistance, etc., to reduce production costs, easy to control product composition, The effect of low coercivity

Active Publication Date: 2020-03-24
江苏龙旺达磁性材料有限公司
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Problems solved by technology

[0005] The biggest problem with the traditional soft magnetic material preparation method is that it cannot be used under high temperature conditions, and the surface density of the product is not high, the smoothness and corrosion resistance are poor, and the application range is limited, especially it cannot meet the high-frequency operation. , can no longer meet the requirements of modern society under complex and severe conditions

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  • A kind of preparation method of magnetic material
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  • A kind of preparation method of magnetic material

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preparation example Construction

[0023] refer to Figure 1-Figure 8 , the specific embodiment adopts the following technical scheme: a preparation method of magnetic material, comprising the following steps: 1, the sample preparation method of DyFeMn: at a temperature from 645K to 770K, every 25K is a temperature gradient, in an argon atmosphere protection Under the condition of constant current of 0.2A, KCl-LiCl (99% analytically pure, 45g+45g)-DyCl was electrolyzed with a two-electrode system 3 (99% analytically pure, 2wt%)-MnCl 2 (99% purity, 2wt%) molten salt system for 3 hours, in which molybdenum wire (purity 99%) is used for the cathode and iron wire (purity 99%) is used for the anode. Since the iron wire is used as the anode, there is a large amount of stable iron ions, thereby creating a stable iron-rich environment, so that iron ions, dysprosium ions and manganese ions can fully react at the cathode;

[0024] 2. The above-mentioned DyFeMn samples were all detected by XRD using a Rigaku D / MAX 2000V...

Embodiment 1

[0026] Example 1: At a temperature of 695K, use pure iron wire as the anode, pure molybdenum wire as the cathode, and a constant current of 0.2A to electrolyze LiCl-KCl-DyCl respectively 3 (2wt%)-MnC l2 (2wt%) and LiCl-KCl-DyCl 3 (2wt%)-MnCl 2 (2 wt%)-CoCl 2 (2wt%) molten salt for 3 hours to obtain DyFeMn samples and CoDyFeMn samples.

[0027] Depend on figure 1 and figure 2 It can be seen that the appearance of the DyFeMn sample is similar to needle-like, which belongs to a typical paramagnetic structure. Under the same temperature and electrolysis conditions, after the transition element Co was added, the sample showed a petal-like shape, which seemed more "soft". From a macroscopic point of view, it can also be seen that the addition of Co changed the original shape of DyFeMn. The arrangement of atomic structures, seemingly without figure 1 The appearance of the linear magnetic structure of the sample in a instead proves that the CoDyFeMn sample is more easily magne...

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Abstract

The invention discloses a preparation method of a magnetic material. According to the method, a pure iron wire is used as an anode, constant-current electrolysis is conducted on LiCl-KCl-DyCl2-MnCl2 fused salt at different temperatures, and on a molybdenum electrode, coreduction is conducted on Dy(III), Mn(II) and Fe(III) ions to synthesize DyFeMn soft magnetic materials. Moreover, a vibrating sample magnetometer (VSM) is used for conducting magnetic performance analysis on products; a result shows that the magnetic strength of the products reaches a saturated state in a magnetic domain direction, and the product magnetic performance is the best at 695 K; after characterization is conducted on microcosmic composition and microcosmic structures of the products through x-ray diffraction (XRD), a scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS), FeMn3, DyMn12 and Dy6Fe23 are obtained successfully on the Mo electrode, wherein the Dy6Fe23 mainly shows magnetic performance, and the DyMn12 mainly shows the heat stability; moreover, DyFeMn ternary alloy cannot be formed. According to the preparation method of the magnetic material, furthermore, under the same electrolysis conditions, CoCl2 is added, magnetic performance analysis is conducted on products at different temperatures, and a result shows that when the temperature is lower than or equal to 745 K, byadding Co, the maximum magnetic strength of the DyFeMn soft magnetic materials can be improved.

Description

technical field [0001] The invention relates to the technical field of molten salt electrolysis, in particular to a method for preparing a magnetic material. Background technique [0002] Molten salt electrolysis has been widely used in experimental sites and industrial production for a long time due to its advantages of low production cost, uniform product composition and high product quality. Moreover, the molten salt electrolysis method, by virtue of its high-temperature experimental environment characteristics, has carried out natural screening on the product and test conditions, that is, it can ensure the thermal stability of the product. [0003] With its unique outer 4f electron layer structure, only 5d and 6s electrons can become free electrons, so rare earth elements (RE) have strong spin-orbit coupling and other characteristics, making them widely used in the field of functional materials. [0004] With its advantages of high saturation magnetic induction, high ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C3/36
CPCC25C3/36
Inventor 李鹏张密林
Owner 江苏龙旺达磁性材料有限公司