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1-3 structure huge magnetoelectric material and preparing process thereof

A technology of electrical materials and magnetostrictive materials, applied in the field of giant magnetoelectric materials with 1-3 structure and their preparation, to achieve the effects of avoiding high frequency loss, good stability and simple preparation process

Inactive Publication Date: 2008-01-23
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention aims at the problem that existing magnetoelectric materials are difficult to satisfy high performance and easy preparation at the same time, improves the structure, and provides a giant magnetoelectric material with a 1-3 structure with excellent magnetoelectric properties; at the same time, the present invention provides such A preparation method of the material, the preparation process is simple and easy to operate

Method used

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  • 1-3 structure huge magnetoelectric material and preparing process thereof
  • 1-3 structure huge magnetoelectric material and preparing process thereof
  • 1-3 structure huge magnetoelectric material and preparing process thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] A PZT ceramic block with a length of 10 mm, a width of 10 mm, and a thickness of 3 mm was selected, and silver electrodes were applied on both sides, and polarized along the thickness direction with a field strength of 2 kV / mm to obtain a green body. The groove width is set to 2.83mm, the cutting depth is set to 2.46mm, and the green body is cut along the length and width directions respectively to obtain a ceramic array (3×3) with an aspect ratio of 4.9 and a volume percentage of 2.25% of PZT columns. , put the cut PZT array into the mold. Mix Terfenol-D powder and epoxy resin uniformly at a volume percentage of 22%:78%, then slowly pour the mixture into a mold, vacuum defoam, and let it stand for one day to solidify. After the epoxy resin is cured, take it out, grind off the excess matrix on the top until the PZT array is exposed, and cover both sides with silver electrodes to obtain a 1-3 structure giant magnetoelectric material with a base. Performance test: pertur...

Embodiment 2

[0045] A PZT ceramic block with a length of 10 mm, a width of 10 mm, and a thickness of 3 mm was selected, and silver electrodes were applied on both sides, and polarized along the thickness direction with a field strength of 2 kV / mm to obtain a green body. The groove width is set to 1.2mm, the cutting depth is set to 2.38mm, and the green body is cut along the length and width directions respectively to obtain a ceramic array (5×6) with an aspect ratio of 4.8 and a volume percentage of 7.5% PZT columns. , put the cut PZT array into the mold. Mix Terfenol-D powder and epoxy resin uniformly at a volume percentage of 23%:77%, then slowly pour the mixture into a mold, vacuum defoam, and let it stand for one day to solidify. After the epoxy resin is cured, take it out, grind off the excess matrix on the top until the PZT array is exposed, and cover both sides with silver electrodes to obtain a 1-3 structure giant magnetoelectric material with a base. Performance test: perturbatio...

Embodiment 3

[0047] A PZT ceramic block with a length of 10 mm, a width of 10 mm, and a thickness of 3 mm was selected, and silver electrodes were applied on both sides, and polarized along the thickness direction with a field strength of 2 kV / mm to obtain a green body. The groove width is set to 0.4mm, the cutting depth is set to 2.32mm, and the green body is cut along the length and width directions respectively to obtain a ceramic array (10×10) with an aspect ratio of 4.6 and a volume percentage of 25% PZT columns. , put the cut PZT array into the mold. Mix Terfenol-D powder and epoxy resin uniformly at a volume percentage of 19%:81%, then slowly pour the mixture into a mold, vacuum defoam, and let it stand for one day to solidify. After the epoxy resin is cured, take it out, grind off the excess matrix on the top until the PZT array is exposed, and cover both sides with silver electrodes to obtain a 1-3 structure giant magnetoelectric material with a base. Performance test: perturbati...

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Abstract

This invention relates to a 1-3 structured huge magnet electric material and its preparation method. The material is composed of piezoelectric ceramics, magnetostriction materials and a high-molecular binding agent, among which, one of the dimension of the piezoelectric ceramics is greater than the other two shaped in a long column and distributed in a 3-D matrix composed of the magnetostriction materials powder and the high-molecular binding agent. This 1-3 structured material has high and stable magnetoelectric conversion coefficient, which can be regulated by altering contents of the piezoelectric ceramics.

Description

technical field [0001] The invention belongs to the technical field of magnetoelectric composite materials and their preparation, and in particular relates to a 1-3 structure giant magnetoelectric material and a preparation method thereof. Background technique [0002] Magnetoelectric composite material is a new type of functional composite material with magnetoelectric effect. The magnetoelectric effect refers to the effect of applying a magnetic field to cause a change in electrical polarization, or the effect of applying an electric field to cause a change in magnetic polarization. The magnetoelectric conversion coefficient is the main indicator to measure the performance of magnetoelectric materials. Due to their great potential applications in sensors, actuators, and transducers, magnetoelectric materials have attracted high research interest in recent years. Since magnetoelectric materials have all the properties of ferromagnetic materials and piezoelectric materials ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L41/16H01L43/10C04B35/472C04B35/491C22C28/00C09J163/00
Inventor 南策文施展张洁蔡宁李敬锋
Owner TSINGHUA UNIV
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