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Magnetic-electric composite material and preparation method thereof

A magnetoelectric composite material and composite material technology, applied in the field of magnetoelectric composite materials and their preparation, can solve the problems of not being able to significantly improve the magnetoelectric conversion coefficient, weaken the stress transmission of the magnetostrictive layer to the piezoelectric layer, etc., and achieve increased force Transmission, the effect of the large magnetoelectric effect

Inactive Publication Date: 2012-08-15
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is a partial offset between these two stresses, which weakens the stress transfer from the magnetostrictive layer to the piezoelectric layer, and cannot significantly improve the magnetoelectric conversion coefficient.

Method used

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  • Magnetic-electric composite material and preparation method thereof
  • Magnetic-electric composite material and preparation method thereof
  • Magnetic-electric composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Cut the PZT into circular samples with the size of f25mm×f23mm×5mm, and perform metallization after ultrasonic cleaning in a mixed solution of alcohol and acetone for 10 minutes. First, put the sample in 0.08M stannous chloride solution, sensitize it at room temperature for 10 minutes, take it out and rinse it with distilled water; put the sample in 0.001M palladium chloride solution, activate it at room temperature for 10 minutes, take it out Rinse with distilled water; finally place the sample in 0.2M sodium hypophosphite solution for 30-60 seconds, and complete the PZT metallization treatment after rinsing with distilled water.

[0026] PZT is put into the prepared electroless plating solution to perform electroless plating of positive magnetostrictive material FeCo. First, weigh the medicines required for the chemical plating FeCo plating solution formula, dissolve them separately and mix them, adjust the pH value to 9 with NaOH solution, and then dilute to the spec...

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Abstract

The invention discloses a magnetic-electric composite material and a preparation method thereof. The composite material has a composite structure formed by compounding a radially-polarized ring-shaped piezoelectric material, a negative magnetostriction layer and a positive magnetostriction layer. The preparation method comprises the following steps of: firstly, performing deposition of the positive magnetostriction layer on the ring-shaped piezoelectric material; secondly, polishing and removing the positive magnetostriction layer on the outer side of the piezoelectric material by using a piece of metallographic abrasive paper; thirdly, sealing the inner side of a ring by using a waterproof heat-resistant silicone rubber, and performing deposition of the negative magnetostriction layer on the outer surface; and finally, performing polarization after removing the silicon rubber to obtain the magnetic-electric composite material. According to the magnetic-electric composite material and the preparation method thereof, through co-extrusion on the ring-shaped piezoelectric material by positive and negative magnetostriction materials in different positions, compared with a ring-shaped magnetic-electric composite material which is made of a single positive magnetostriction material with the same type or a ring-shaped magnetic-electric composite material which is made of a single negative magnetostriction material with the same type, the interlayer force transmission is enhanced, and the magnetic-electric composite material has a greater magnetic-electric effect.

Description

technical field [0001] The invention relates to the technical field of magnetoelectric composite material with giant magnetoelectric effect and its preparation. In particular, it relates to a three-layer annular magnetoelectric composite material of negative magnetostrictive material / piezoelectric material / positive magnetostrictive material and a preparation method thereof. Background technique [0002] Magnetoelectric composite material is a new type of functional material formed by compounding ferroelectric phase and ferromagnetic phase through a certain method. It not only has the piezoelectric effect of the former and the magnetostrictive effect of the latter, but also produces new magnetic properties. Electric conversion effect. Magnetoelectric composite materials have great potential application prospects in sensors, magnetic field detection, magnetoelectric energy conversion, intelligent filters, magnetic recording, etc. The layered magnetoelectric materials develop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/16H01L41/20H01L41/187C04B41/88H10N30/853H10N35/85
Inventor 王寅岗洪贺毕科
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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