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Interdigital type piezoelectric fibre composite material, preparation method and application thereof

A technology of piezoelectric fibers and composite materials, which is used in the selection of materials for piezoelectric devices or electrostrictive devices, the manufacture/assembly of piezoelectric/electrostrictive devices, and the selection of device materials. Component research and other issues, to achieve the effect of significant sensing performance, small fiber diameter, and sensitive voltage response

Inactive Publication Date: 2010-02-10
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Domestic research on IDEPFC is rare. According to literature reports, the Institute of Intelligent Materials and Structures of Nanjing University of Aeronautics and Astronautics has studied the structure of interdigitated electrode piezoelectric fiber composites as sensors and actuators, and used the finite element method Establish a model for analysis, but the work of the research group did not study the preparation of IDEPFC; Chen Wanglihua of Hong Kong Polytechnic University and Li Kun of Jiangsu University of Technology and others mainly focused on the research of piezoelectric fiber composites on type 1-3 Cylindrical composite materials, mainly used to make 1-3 type piezoelectric transducers, no research on IDEPFC components

Method used

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  • Interdigital type piezoelectric fibre composite material, preparation method and application thereof
  • Interdigital type piezoelectric fibre composite material, preparation method and application thereof
  • Interdigital type piezoelectric fibre composite material, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1: Piezoelectric lead zirconate titanate PZT fibers were prepared by sol-gel method and continuous spinning technology, and ferroelectric tetragonal phase ceramic fibers were obtained after heat treatment. The PZT ceramic fibers had a dense structure and a diameter of less than 50 μm. The PZT ceramic fibers are arranged in the mold, and the prepared epoxy resin is poured around the PZT ceramic fibers and cured. Different numbers of PZT ceramic fibers were arranged to obtain piezoelectric fiber composites with different fiber volume fractions. The mass ratio of epoxy resin and hardener in Example 1 is 100:32, and the fiber volume fraction is 30%. After weighing and stirring evenly, place it in a vacuum oven to remove air bubbles by vacuuming at room temperature. The piezoelectric fiber composite material After curing, it comes out of the mold and has a thin and long sheet shape. Grind the cured sample into a thin slice of about 0.3-0.4mm with sandpaper, and poli...

Embodiment 2

[0042] Example 2: Piezoelectric lead zirconate titanate PZT fibers were prepared by sol-gel method and continuous spinning technology. The PZT fibers were heat-treated at 1000° C. for 1 hour, and the fiber structure was compact and the diameter was less than 50 μm. The PZT ceramic fibers are arranged in the mold, and the prepared epoxy resin is poured around the PZT ceramic fibers and cured. A piezoelectric fiber composite material with a fiber volume fraction of 40% was prepared. After preparing the epoxy resin and stirring it evenly, place it in a vacuum oven at room temperature to evacuate to remove air bubbles. After the piezoelectric fiber composite material is cured, it will come out of the mold and have a thin and long sheet shape. Grind the cured sample into a thin slice of about 0.3mm with sandpaper, and polish it. In the grinding process, first use coarse sandpaper to polish, then use fine sandpaper, and finally polish with 0.5 μm abrasive paste to obtain 1-3 type P...

Embodiment 3

[0044] Example 3: Piezoelectric lead zirconate titanate PZT fibers were prepared by sol-gel method and continuous spinning technology. The PZT fibers were heat-treated at 900° C. for 1 hour, and the fiber structure was dense and the diameter was less than 50 μm. The PZT ceramic fibers are arranged in the mold, and the prepared silicone resin is poured around the PZT ceramic fibers and cured. A piezoelectric fiber composite material with a fiber volume fraction of 50% was prepared. After preparing the silicone resin and stirring it evenly, place it in a vacuum oven at room temperature to evacuate to remove air bubbles. After the piezoelectric fiber composite material is cured, it will come out of the mold and have a thin and long sheet shape. Grind the cured sample into a thin slice of about 0.3mm with sandpaper, and polish it. In the grinding process, first use coarse sandpaper to polish, then use fine sandpaper, and finally polish with 0.5 μm abrasive paste to obtain 1-3 typ...

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Abstract

The invention relates to an interdigital type piezoelectric fibre composite material, a preparation method and an application thereof, which relates to a functional material and provides the interdigital type piezoelectric fibre composite material which works based on a bending vibration mode and can induce stress waves in different directions, the preparation method and the application thereof. An upper electrode of the piezoelectric fibre composite material of the fork finger type piezoelectric fibre composite material is an interdigital electrode, the interdigital fingerbreadth is 0.05mm, the interdigital finger distance is 0.2mm, polarization directions between the adjacent interdigitals are opposite, and the interdigitals are electrically connected in parallel. The preparation methodcomprises the following steps: carrying out postheating treatment on the piezoelectric fibre and converting into piezoelectric ceramic fibre; taking epoxy resin or silicone and the like as a basal body phase, taking the piezoelectric ceramic fibre as a piezoelectric phase, preparing the 1-3 type piezoelectric fibre composite material, grinding, polishing and obtaining a thin piece of the piezoelectric fibre composite material; and preparing the interdigital electrode on the upper surface of the thin piece of the piezoelectric fibre composite material and obtaining the interdigital type piezoelectric fibre composite material by polarization treatment. The interdigital type piezoelectric fibre composite material can be used for preparing a prototype component of a sensor of a cantilever beamstructure.

Description

technical field [0001] The invention relates to a functional material, in particular to an interdigitated piezoelectric fiber composite material and its preparation method and application. Background technique [0002] Ceramic / polymer piezoelectric composite material is a new type of intelligent material. It combines the excellent piezoelectric performance of piezoelectric ceramics with the characteristics of good softness and low acoustic impedance of polymers. It can adapt to changes in the environment and realize mechanical energy and The mutual conversion between electric energy has the dual characteristics of sensing elements and actuators. [0003] In 1978, Newnham et al. (Newnham RE et al., Connectivity and piezoelectric-pyroelectriccomposites. Mater Res Bull, 1978.13: 525) conducted theoretical and experimental research on the properties of composite materials, and proposed the concept of composite material connectivity, which is the basis for composite materials. R...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/08H01L41/18H01L41/22H10N30/00
Inventor 熊兆贤潘捷麦满芳薛昊陈立富洪礼清曹泽亮
Owner XIAMEN UNIV
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