Method for increasing magnetoelectric property of gradient material

A gradient material, magnetoelectric technology, applied in the direction of device material selection, material selection for magnetostrictive devices, piezoelectric/electrostrictive device manufacturing/assembly, etc., can solve the problem of high material brittleness and material magnetoelectric properties Inconspicuous, poor material processing performance and other problems, to achieve the effect of increased magnetoelectric performance and simple preparation process

Inactive Publication Date: 2011-07-20
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

At present, some magnetoelectric materials have the following disadvantages: (1) The magnetoelectric properties of the material are not obvious; (2) The material is very brittle; (3) The surface of the material needs to be coated with electrodes; (4) The processing performance of the material is poor; A hysteresis magnetic field needs to be applied in the device design, which is not conducive to the miniaturization of the device

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  • Method for increasing magnetoelectric property of gradient material
  • Method for increasing magnetoelectric property of gradient material
  • Method for increasing magnetoelectric property of gradient material

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Embodiment Construction

[0014] 1. If figure 1 , as shown in 2, the object of our research is the gradient material, which is composed of piezoelectric material PZT and nickel-based alloy, through the piezoelectric effect and the hysteresis effect to produce a product effect, to achieve magnetoelectric coupling, thus Improve the magnetoelectric coupling effect of the material.

[0015] 2. Use silver epoxy adhesive on the upper and lower surfaces of the PZT ceramic gradient sample, put it in a high-temperature furnace and bake it at 900°C for 36 minutes, polarize along the thickness direction, and bond it with Ni / Mn / Ti alloy. After solidification, the gradient material sample required by the present invention is obtained.

[0016] 3. The characteristic of the magnetoelectric property measurement system is 150Hz~1500Hz, and the DC bias field is 0~1.2P, which can realize variable temperature measurement. The sample is placed in the electromagnet and adjusted to room temperature, and its length directio...

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Abstract

The invention relates to a method for increasing a magnetoelectric property of a gradient material, comprising the step of preparing Ni-based alloy and piezoelectric ceramics into a gradient material, wherein the Ni-based alloy is Ni/Mn/Ti, and the piezoelectric ceramics is PZT (Lead Zirconate Titanate) and belongs to ferroelectric ceramics. Compared with the traditional gradient material, the gradient material provided by the invention has the characteristics of high magnetoelectric property, simple preparation process, stabile property, strong designability, and by changing the method for designing and preparing the material, the magnetoelectric property of the material can be obviously improved.

Description

technical field [0001] The invention provides a method for improving the magnetoelectric properties of a gradient material, which relates to the fields of electromagnetism, physics, and materials, especially the gradient material and design method of a magnetostrictive / piezoelectric coupling mechanism. Background of the invention [0002] Magnetoelectric materials have the function of converting magnetic energy and electric energy and can generate dielectric polarization under the action of an external magnetic field or magnetization under the action of an external electric field. The magnetoelectric coupling properties mainly describe the response of the electric polarization in the medium to the external magnetic field or the response of the magnetic moment to the external electric field, including the coupling effect of ferroelectric and ferromagnetic materials, which can realize data storage by controlling the electric polarization by the magnetic field or data transmissi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/20H01L41/22H01L41/37
Inventor 李永舒畅
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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