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Circular cylinder-shaped composite material with giant magnetoelectric effect and method for making same

A magnetoelectric composite material, cylindrical technology, applied in the manufacture/processing of electromagnetic devices, manufacture/assembly of magnetostrictive devices, manufacture/assembly of piezoelectric/electrostrictive devices, etc., can solve the transmission of force It is not very ideal, and the process conditions are easy to control, the magnetic and electrical properties are improved, and the elastic loss is avoided.

Inactive Publication Date: 2009-06-17
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the limitations of the preparation method, the previous magnetoelectric composite materials can only be limited to simple flat structures such as squares and discs, and are ineffective for other complex structures, such as cylindrical structures.
Since the magnetic layer (one layer or upper and lower layers) is in a free state in the flat structure, the force transmission is not very ideal.

Method used

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  • Circular cylinder-shaped composite material with giant magnetoelectric effect and method for making same
  • Circular cylinder-shaped composite material with giant magnetoelectric effect and method for making same
  • Circular cylinder-shaped composite material with giant magnetoelectric effect and method for making same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The PZT is cold-pressed and sintered into a cylindrical shape of 8×φ18×φ20mm, where 8mm is the height of the cylinder, and φ18 and φ20 are the inner and outer diameters of the cylinder, respectively, with electrodes on both sides. Then polarize the PZT with the prepared electrode in the silicone oil at 150°C with an electric field of 50kv / cm, the polarization direction is along the radial direction of the cylinder, from the inside to the outside, keep the electric field and temperature for 30 minutes, and then cool with the oil to room temperature. The polarized sample was ultrasonically cleaned with acetone until the surface silicone oil and organic matter were removed, and rinsed with deionized water. The cleaned samples were plated with Ni electrodes by electroless plating, and wires were welded on the surfaces of the two electrodes. Put the sample into the prepared electroplating solution for electroplating.

[0024] Temperature control and magnetic stirring are r...

Embodiment 2

[0028] The PZT is cold-pressed and sintered and cut into a 3×φ18×φ20mm cylinder, where 8mm is the height of the cylinder, and φ18 and φ20 are the inner and outer diameters of the cylinder, respectively, with electrodes on both sides. Then polarize the PZT with the prepared electrode in the silicone oil at 150°C with an electric field of 50kv / cm, the polarization direction is along the radial direction of the cylinder, from the inside to the outside, keep the electric field and temperature for 30 minutes, and then cool with the oil to room temperature. The polarized sample was ultrasonically cleaned with acetone until the surface silicone oil and organic matter were removed, and rinsed with deionized water. The cleaned samples were plated with Ni electrodes by electroless plating, and wires were welded on the surfaces of the two electrodes. Seal the inner surface of the cylinder with 704 silicone rubber produced by Nanjing University, put the sample into the prepared electropl...

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PUM

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Abstract

The present invention relates to a cylinder shape magnetoelectricity compound material which has a large magnetoelectricity effect and belongs to the structure design and making of the magnetoelectricity compound material. The present invention is made by polarizing and plating the prior Ni electrode cylinder shape porcelain in high temperature. The present invention is the piezoelectricity porcelain which has piezoelectricity effect and is sintered and cut, and then plated with a conductive Ni electrode; then the porcelain of the Ni electrode is polarized in silicon oil and the polarized sample is plated in the prepared plating liquid till the present invention gets the necessary magnetic layer to form the magnetoelectricity compound material. Compared with the prior flat structure, the present invention has a self bound capability to make the magnetic layer couple perfectly with the piezoelectricity layer; and the present invention can enhance the magnetoelectricity effect.

Description

technical field [0001] The invention relates to the field of metal materials, and relates to the preparation of magnetoelectric composite materials, in particular to the cylindrical feature of magnetoelectric composite materials prepared by electroplating. Background technique [0002] Layered magnetoelectric composite material is a magnetoelectric composite material system developed in recent years. Compared with the previous magnetoelectric composite material, it overcomes the weakness of the previous system, which is low in resistivity and not easy to polarize. Ferromagnetic phase materials such as stretchable terbium dysprosium iron have greatly improved their magnetoelectric properties. The breakthrough from the traditionally prepared mV / cm Oe level to the V / cm Oe level can be said to be a great leap forward in the preparation of magnetoelectric composite materials. , the preparation of such materials mainly uses lead zirconate titanate (PZT) powder with strong piezoele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L41/22H01L43/12H10N35/01H10N50/01
Inventor 潘德安乔利杰
Owner UNIV OF SCI & TECH BEIJING
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