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Magneto-electric electret with adjustable magneto-electric effect and preparation method of magneto-electric electret

A technology of magnetoelectric effect and electret, which is applied in the field of magnetoelectric electret and its preparation, can solve the problems of working temperature lower than room temperature, low magnetoelectric coupling, difficult to apply devices, etc., and achieve simple and easy process Effect

Active Publication Date: 2020-04-10
XI AN JIAOTONG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, due to the natural contradiction between the existence mechanism of magnetic order and ferroelectric order in materials, there are very few magnetoelectric materials in nature. In addition, their magnetoelectric coupling is very low, and their working temperature is much lower than room temperature. Applied to the actual device

Method used

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  • Magneto-electric electret with adjustable magneto-electric effect and preparation method of magneto-electric electret
  • Magneto-electric electret with adjustable magneto-electric effect and preparation method of magneto-electric electret
  • Magneto-electric electret with adjustable magneto-electric effect and preparation method of magneto-electric electret

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Embodiment Construction

[0029] The present invention will be described in detail below in conjunction with the accompanying drawings and specific examples, but it is not intended to limit the present invention.

[0030] Such as figure 1 As shown, a magnetoelectric electret with controllable magnetoelectric effect of the present invention includes a layer of magnetically active polymer matrix 1 and a layer of polymer matrix 2 with surface charges, and the magnetically active polymer matrix 1 Bonding with the polymer matrix 2 with surface charges forms a sandwich structure with charges in the middle.

[0031] As shown in Figure 2, select a polytetrafluoroethylene PTFE film with a thickness of 30 μm, and use the corona polarization method to charge it to make it carry negative charges on the surface. The corona charging voltage is controlled at -10kV, electrodes are attached to the back of the film, and the charging temperature is normal temperature. By controlling the value of the charging voltage to...

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Abstract

The invention discloses a magnetoelectric electret with an adjustable magnetoelectric effect and a preparation method of the magnetoelectric electret. The magnetoelectric electret comprises a layer ofmagnetoactive polymer matrix and a layer of polymer matrix with surface charges, and the magnetoactive polymer matrix and the polymer matrix with the surface charges are bonded or stacked to form a sandwich structure in which two layers of materials sandwich one layer of charges. The magnetoelectric effect of the magnetoelectric electret is adjusted according to the charge quantity of the polymermatrix with the surface charges, the doping quantity of the magnetic powder in the magnetic active polymer matrix, the thickness ratio of the magnetic active polymer matrix to the polymer matrix withthe surface charges and the size of an external magnetic field. The invention further discloses a preparation method of the magnetoelectric electret, and the preparation method is simple, is low in manufacturing cost, is easy for large-scale production, and can be used in the fields of energy capture, flexible sensors, artificial skin, artificial muscles, self-powered equipment and the like.

Description

technical field [0001] The invention belongs to the field of functional materials, and mainly relates to a magnetoelectric electret with adjustable magnetoelectric effect and a preparation method thereof. Background technique [0002] The magnetoelectric effect means that a material can produce electric polarization under the action of a magnetic field, and can produce magnetic polarization under the action of an electric field. Due to its natural coupling effect, it has many application prospects, such as energy harvesting, sensing, data storage, drug delivery and other fields. The existence of the magnetoelectric effect requires the coexistence of two ordered structures, magnetic order and ferroelectric order, and a certain form of coupling between the two ordered structures. However, due to the natural contradiction between the existence mechanism of magnetic order and ferroelectric order in materials, there are very few magnetoelectric materials in nature. In addition, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L43/10H01L43/12H10N50/01
CPCH10N50/85H10N50/01
Inventor 谭楷邓谦申胜平文馨
Owner XI AN JIAOTONG UNIV
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