Magnetostrictive material and preparation method thereof

A technology of magnetostrictive materials and raw materials, which is applied in the direction of material selection and device material selection for magnetostrictive devices, and achieves the effects of easy process control, good magnetostrictive performance and comprehensive usability, and simple operation.

Inactive Publication Date: 2020-06-09
XIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for a non-oriented polycrystalline bulk material, the change in linearity is about 1 / 3 of the change in volume, and only about 667ppm of magnetostriction can be produced during the magnetization process, which is much smaller than that of rare earth giant magnetostrictive materials. Magnetostrictive value

Method used

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  • Magnetostrictive material and preparation method thereof

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Embodiment 1

[0032] A preparation method of the above-mentioned magnetostrictive material, comprising the following steps:

[0033] a. Weigh the raw materials according to the stoichiometric ratio Mn:Ni:Co:Si:Y:Eu=0.9:0.1:1:1:1:0.35, mix evenly, pour the prepared raw materials into a beaker, add distilled water to wash the raw materials, Pour off the distilled water;

[0034] b. Pour the raw materials into the copper crucible of the arc melting furnace. Put the elemental Zr into the copper crucible, number them sequentially, and close the furnace chamber. The electric arc furnace is cooled by a circulating water cooling system. Before smelting, use a mechanical pump to evacuate to below 9Pa, and then use a molecular pump to continue evacuating to 5×10 -5 Pa, turn off the molecular pump, fill with argon to 0.6 atmosphere. Start the vacuum arc melting furnace, first align the tungsten electrode with Zr, press the start button to start the arc, and then increase the current to 250A, and sta...

Embodiment 2

[0039] A preparation method of the above-mentioned magnetostrictive material, comprising the following steps:

[0040] a. Weigh the raw materials according to the stoichiometric ratio Mn:Ni:Co:Si:Y:Tm=0.92:0.08:1:1:1:0.22, mix evenly, pour the prepared raw materials into a beaker, add distilled water to wash the raw materials, Pour off the distilled water;

[0041] b. Pour the raw materials into the copper crucible of the arc melting furnace. Put the elemental Zr into the copper crucible, number them sequentially, and close the furnace chamber. The electric arc furnace is cooled by a circulating water cooling system. Before smelting, use a mechanical pump to evacuate to below 9Pa, and then use a molecular pump to continue evacuating to 5×10 -5 Pa, turn off the molecular pump, fill with argon to 0.6 atmosphere. Start the vacuum arc melting furnace, first align the tungsten electrode with Zr, press the start button to start the arc, and then increase the current to 250A, and...

Embodiment 3

[0046] A preparation method of the above-mentioned magnetostrictive material, comprising the following steps:

[0047] a. Weigh the raw materials according to the stoichiometric ratio Mn:Ni:Co:Si:Y:Ho=0.95:0.05:1:1:1:0.55, mix evenly, pour the prepared raw materials into a beaker, add distilled water to wash the raw materials, Pour off the distilled water;

[0048] b. Pour the raw materials into the copper crucible of the arc melting furnace. Put the elemental Zr into the copper crucible, number them sequentially, and close the furnace chamber. The electric arc furnace is cooled by a circulating water cooling system. Before smelting, use a mechanical pump to evacuate to below 9Pa, and then use a molecular pump to continue evacuating to 5×10 -5 Pa, turn off the molecular pump, fill with argon to 0.6 atmosphere. Start the vacuum arc melting furnace, first align the tungsten electrode with Zr, press the start button to start the arc, and then increase the current to 250A, and...

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Abstract

The invention discloses a magnetostrictive material and a preparation method thereof, which belongs to the technical field of new materials. The molecular formula of the magnetostrictive material is Mn<1-x>Ni<x>CoSiYM<y>, wherein the value range of x is 0.05 to 0.10, the value range of y is 0 to 0.85, and M is selected from one or more of Nd, Tm, Ho, Eu, Ta. The MnCoSi-based alloy prepared by thepreparation method disclosed by invention has a room temperature saturation magnetostriction of 1900 ppm, and the critical field can be reduced to a minimum of 0.3T; and compared with the positive MnCoSi alloy, the magnetostriction value is increased by 500 ppm, and the critical field is reduced by 2.3T, which promotes the application process of the MnCoSi material in magnetostriction.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a magnetostrictive material and a preparation method thereof. Background technique [0002] As an important class of ferromagnetic functional materials, magnetostrictive materials will reversibly change their geometric dimensions in all directions with changes in the magnetization state. This reversible deformation induced by a magnetic field is called magnetostriction. Since Joule proposed the magnetostrictive effect in 1842, magnetostrictive materials have been widely used in aviation, navigation, robotics, new energy, biomedicine and many other fields, playing an important role in the national economy and industrial production. [0003] Famous magnetostrictive material, rare earth-transition alloy Tb 0.3 Dy 0.7 Fe 2 (Terfenol-D), under a 1T magnetic field, obtained a large magnetostriction of 1600ppm in the direction of the easy axis. However, such materials have pro...

Claims

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Application Information

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IPC IPC(8): C22C30/00C22C1/02H01L41/20
CPCC22C30/00C22C1/02H10N35/85
Inventor 周廷栋
Owner XIHUA UNIV
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