Enhanced material for magnetic beads, preparation method of enhanced material and preparation method of laminated magnetic beads

An enhanced, magnetic bead technology, applied in the direction of magnetic materials, inductors/transformers/magnet manufacturing, magnetic objects, etc., can solve the problem of low bonding strength

Active Publication Date: 2020-08-25
BEIJING RAILWAY SIGNAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, high-entropy alloy FeCoNiCrAl powder is used as an alloy material, and there is a problem that the bonding strength between powders and between powders and additives is not high.

Method used

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  • Enhanced material for magnetic beads, preparation method of enhanced material and preparation method of laminated magnetic beads
  • Enhanced material for magnetic beads, preparation method of enhanced material and preparation method of laminated magnetic beads

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preparation example Construction

[0039] The application also provides a method for preparing the enhanced material for magnetic beads, comprising the following steps:

[0040] A) ZrO 2 Powder, SiO 2 Powder, Al 2 o 3 Powder, TiO 2 Powder, B 2 o 3 Powder and mica KAl 2 (AlSi 3 o 10 )(OH) 2 The powder is ball milled and mixed to obtain the additive;

[0041] B) FeCoNiCrAl@SiO with core-shell structure 2 The high-entropy alloy is mixed with the additive to obtain a reinforced material for magnetic beads.

[0042] In the above-mentioned enhanced material for magnetic beads, the ZrO 2 Powder, SiO 2 Powder, Al 2 o 3 Powder, TiO 2 Powder, B 2 o 3 Powder and mica KAl 2 (AlSi 3 o 10 )(OH) 2 The particle size of the powder is 1-20 μm. During the ball milling process, the ball-to-material ratio of the ball mill is (10-20):1, and the rotation speed is 100-300 r / min.

[0043] The above-mentioned base materials and additives have been described in detail and will not be repeated here.

[0044] The p...

Embodiment 1

[0054] (1) Fe powder, Co powder, Ni powder, Cr powder and Al powder are measured in equal atomic proportions, and the particle diameters are all between 1 and 10 μm; the powders are respectively placed in hydrochloric acid with a dilution concentration of 0.1%. Wash at room temperature for 3 minutes to remove surface scale. After completion, wash with deionized water for 3 times and absolute ethanol for 3 times, dry in vacuum, and mix for later use;

[0055] (2) Place the mixed powder in the above (1) in a ball mill for ball milling, the ball-to-material ratio is 20:1, the rotating speed: 300r / min, and the ball milling time: 50h, that is, a high-entropy alloy FeCoNiCrAl is prepared, and the powder is collected for later use;

[0056] (3) Prepare 500mL solution, including 400mL absolute ethanol, 95mL deionized water, and 5mL ammonia water, and stir evenly;

[0057] (4) The mixed powder described in (2) above is slowly added to the solution in (3) above, and fully stirred for 5 ...

Embodiment 2

[0068] (1) Fe powder, Co powder, Ni powder, Cr powder and Al powder are measured in equal atomic proportions, and the particle diameters are all between 1 and 10 μm, and the powders are respectively placed in hydrochloric acid with a dilution concentration of 0.1%. Wash at room temperature for 3 minutes to remove surface scale. After completion, wash with deionized water for 3 times and absolute ethanol for 3 times, dry in vacuum, and mix for later use;

[0069] (2) Place the mixed powder in the above (1) in a ball mill for ball milling, the ball-to-material ratio is 20:1, the rotating speed: 300r / min, and the ball milling time: 50h, that is, a high-entropy alloy FeCoNiCrAl is prepared, and the powder is collected for later use;

[0070] (3) Prepare 500mL solution, including 400mL absolute ethanol, 95mL deionized water, and 5mL ammonia water, and stir evenly;

[0071] (4) The mixed powder described in (2) above is slowly added to the solution in (3) above, and fully stirred fo...

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Abstract

The invention provides an enhanced material for magnetic beads. The enhanced material is composed of a base material and an additive. The base material is FeCoNiCrAl-coated SiO2 high-entropy alloy with a core-shell structure; the additive is composed of ZrO2, SiO2, Al2O3, TiO2, B2O3, and mica KAl2 (AlSi3O10) (OH) 2. The invention further provides a preparation method of the enhanced material for the magnetic beads. Furthermore, the invention further provides a preparation method of the laminated magnetic beads. According to the invention, the high-entropy alloy with the FeCoNiCrAl-coated SiO2shell-core structure is used as the base material; the additive contains ZrO2 powder in a certain proportion, and zirconite ZrSiO4 is formed in situ by SiO2 and ZrO2 in the calcining process, so thatthe bonding strength between the base materials and between the base materials and the additive is improved, and finally, the performance of the laminated magnetic beads is improved.

Description

technical field [0001] The invention relates to the technical field of magnetic bead materials, in particular to a reinforced material for magnetic beads, a preparation method thereof and a method for preparing laminated chip magnetic beads. Background technique [0002] As a widely used component, magnetic beads have the function of absorbing high-frequency harmonics in the circuit. The preparation materials require high magnetic permeability and high impedance. At present, magnetic ferrite is mainly used as the main preparation material. There are The single problem of preparation materials limits the further application of magnetic beads. [0003] The high-entropy alloy FeCoNiCrAl powder has good magnetic properties and high impedance characteristics, and has potential application prospects in the field of magnetic bead preparation. However, as an alloy material, the high-entropy alloy FeCoNiCrAl powder has the problem of low bonding strength between powders and between ...

Claims

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Application Information

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IPC IPC(8): H01F1/147H01F41/02B22F1/00B22F1/02
CPCH01F1/14741H01F41/0253B22F1/052B22F1/16
Inventor 温术来于树永赵寰宇范佳斌卢江
Owner BEIJING RAILWAY SIGNAL
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