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Poly meta-fluoroethylene/lead zirconate titanate/terbium dysprosium iron composite material sheet with magnetoelectric property and its preparation

A technology of polyvinylidene fluoride and composite materials, which is applied in the field of composite materials, can solve the problems of difficult molding and application of composites, and achieve the effects of acoustic impedance matching, easy molding, and good chemical stability

Inactive Publication Date: 2003-01-22
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is mainly to solve the shortcomings of alloy / ceramic composites that are not easy to form and difficult to apply, and to provide a composite system that can realize magnetic effect-force effect-electric effect, flexible conversion, and easy forming with magnetoelectric properties. Composite material, and a method for preparing the composite material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take 30 parts of PVDF, 68 parts of PZT, and 2 parts of Terfenol-D according to the volume ratio, mix them together, and knead them on a mixer at 200°C for 10 minutes, then press them on a tablet machine at 200-210°C for 20 minutes, and press them into thin slices , Silver-plated (or gold) electrodes, polarized at 4000-5000V for 15 minutes, and the resulting product is tested for magnetic and electrical properties.

Embodiment 2

[0028] Take 30 parts of PVDF, 62 parts of PZT, and 8 parts of Terfenol-D according to the volume ratio, and press them into polyvinylidene fluoride / lead zirconate titanate, polyvinylidene fluoride / terbium dysprosium iron and polyvinylidene fluoride / lead zirconate titanate respectively on the tablet press Sheet, and then laminate the three-layer sheet again to obtain a layered sheet composite material. The sheeting temperature is 180-220°C, hot-pressed for 20 minutes, and kept at room temperature for 5 minutes. The next step is to remove the gold-plated electrode, and the polarization time is 20 minutes. Except difference, others are carried out by the method of embodiment 1.

Embodiment 3

[0030] Take 30 parts of PVDF, 66 parts of PZT, and 4 parts of Terfenol-D, and disperse lead zirconate titanate and terbium dysprosium iron in the PVDF solution respectively to obtain a PVDF / PZT composite solution and a PVDF / Terfenol-D composite solution, using a stainless steel sheet as the substrate, The two solutions were suspended and coated on the substrate layer by layer, and then dried with an infrared lamp to obtain a thin sheet composite material, and the following was carried out as in Example 1.

[0031] Example number

[0032] The performance test shows that the composite material with the ratio selection: PVDF in the range of 20-30%, Terfenol-D in the range of 2-12%, and the rest PZT has magnetoelectric properties.

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PUM

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Abstract

The composite material has the material composition including polyvinylidene fluoride (PVDF) 20-30 wt%, Terfenol-D 2-12 wt% and plumbum zirconate titanate (PZT) the rest, and is prepared through the steps of: weighing the material, PVDF, PZT and Terfenol-D; pressing tablet, lamination or painting to produce sheet, plating gold or silver electrode, and final polarization at 4000-5000 v voltage. The magnetoelectric composite material is easy to form and convenient in use.

Description

technical field [0001] The invention relates to a composite material with magnetoelectric properties, in particular to a polyvinylidene fluoride / lead zirconate titanate / terbium dysprosium iron (PVDF / PZT / Terfenol-D) sheet composite material with magnetoelectric properties. Background technique [0002] Magnetoelectric material is a functional material that integrates the advantages of magnetostrictive material and electrostrictive material, realizes the conversion of magnetic effect and electric effect, and causes the change of current through the change of magnetic field. With the development of science and technology, this material can be used in many fields, such as used as a sensor. This material is not only small in size, light in weight, and easy to carry, but also has an increased sensitivity to the conversion of magnetic signals and electrical signals, so it can accurately respond Changes in signals; foreign countries have some bold ideas about the development of magn...

Claims

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Application Information

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IPC IPC(8): C08K3/24C08L27/16
Inventor 熊传溪董丽杰陈娟南策文
Owner WUHAN UNIV OF TECH
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