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A magnetoelectric composite material structure with controllable multi-resonance frequency and its preparation method

A magnetoelectric composite material and multi-resonance technology, applied in the selection of materials, manufacturing/processing of electromagnetic devices, circuits, etc., can solve the problem that the resonance frequency cannot be adjusted independently, and achieve the effect of easy preparation

Active Publication Date: 2015-08-19
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, in the frequency range of 1 kHz to 150 kHz in the alternating magnetic field, only one or two resonance peaks (that is, one or two resonance frequencies) appear in the relationship between the magnetoelectric voltage coefficient and frequency of most magnetoelectric composite materials. Moreover, each resonant frequency cannot be adjusted independently

Method used

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  • A magnetoelectric composite material structure with controllable multi-resonance frequency and its preparation method
  • A magnetoelectric composite material structure with controllable multi-resonance frequency and its preparation method
  • A magnetoelectric composite material structure with controllable multi-resonance frequency and its preparation method

Examples

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Effect test

Embodiment 1

[0022] Ni / PZT / Ni annular layered magnetoelectric composites with average diameters of 22.5 mm, 28.5 mm and 34.5 mm were prepared by electroless plating process. The annular layered magnetoelectric composite materials with different diameters are connected in series with wires to form a series structure. The structure is as follows figure 1 as shown in a. figure 2 Shown are the magnetoelectric voltage coefficients α of circular layered magnetoelectric composites with different diameters E,V Changes with the frequency f of the alternating magnetic field. A resonant peak appears in the curve of each ring-shaped layered magnetoelectric composite material, and the ring-shaped layered magnetoelectric composite materials with different ring diameters have their own specific resonance frequencies, which can be calculated and predicted by empirical formulas. Connecting two annular layered magnetoelectric composite materials in series, the magnetoelectric voltage coefficient α E,V T...

Embodiment 2

[0024] Ni / PZT / Ni annular layered magnetoelectric composites with average diameters of 22.5mm and 28.5mm were prepared by electroless plating process. The circular layered magnetoelectric composite materials with different diameters are connected in parallel with wires to form a parallel structure. The structure is as follows figure 1 as shown in b. figure 2 Shown are the magnetoelectric voltage coefficients α of circular layered magnetoelectric composites with different diameters E,V Changes with the frequency f of the alternating magnetic field. A resonant peak appears in the curve of each annular layered magnetoelectric composite. Connect two circular layered magnetoelectric composite materials in parallel, the magnetoelectric voltage coefficient α E,V Two resonant peaks appear in the changing curve with the frequency f of the alternating magnetic field, such as image 3 as shown in b.

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Abstract

The invention relates to a magnetoelectric composite material structure capable of controlling multiple resonant frequencies and manufacturing method thereof, which belongs to the technical field of multiferroic magnetoelectric material. The magnetoelectric composite structure capable of controlling multiple resonant frequencies is composed of annulus laminar magnetoelectric composites with concentric circle structures but different diameters, and ring-shape space is arranged between the annulus laminar magnetoelectric composites with different diameters. The inner side and the outer side of an annulus piezoelectric material are respectively connected with a layer of annulus magnetostrictive material; the annulus laminar magnetoelectric composites with different diameters are connected together through a guide line and form a series structure or a parallel structure; the annulus laminar magnetoelectric composites are manufactured by respectively depositing a layer of annulus magnetostrictive material on the inner surface and the outer surface of annulus piezoelectric material with different diameters through coating technology. The magnetoelectric composite structure capable of controlling multiple resonant frequencies realizes the multiple resonant frequency and resonant peak in a certain range of alternating magnetic field frequency, and can regulate and control the size of corresponding resonant frequency through changing the diameter of each annulus laminar magnetoelectric composite.

Description

technical field [0001] The invention particularly relates to a magnetoelectric composite material structure with controllable multi-resonance frequency and a preparation method thereof, belonging to the technical field of multiferroic magnetoelectric materials. Background technique [0002] With the rapid development of science and technology and the cross-penetration of various disciplines, it is difficult for a single-performance material to meet various high-demand comprehensive indicators. The research on metamaterials with special properties compounded by multiple materials has become the field of materials science and engineering. research hotspots. Magnetoelectric materials, especially magnetoelectric composite materials, have very attractive application prospects in the fields of sensors, magnetic field detection, magnetoelectric energy conversion, intelligent filters, magnetic recording, etc., and have become a very important functional composite material. Material...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L43/00H01L43/10H01L43/12H10N50/01
Inventor 周济毕科
Owner TSINGHUA UNIV