Piezoelectric ceramic fibrous composite material and preparation method thereof

A technology of fiber composite materials and piezoelectric ceramics, applied in the manufacture/assembly of piezoelectric/electrostrictive devices, piezoelectric/electrostrictive/magnetostrictive devices, circuits, etc., can solve the problem of large electric field loss and low efficiency , round fiber and electrode contact area is small and other problems, to achieve the effect of low cost, high efficiency, easy to control

Active Publication Date: 2012-05-02
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although AFC has many advantages compared with traditional ceramics, the electric field loss is large and the efficiency is low due to the small contact area between the circular fiber and the electrode

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment is a method for preparing a 1-1 type piezoelectric fiber composite material using PNN-PZT piezoelectric ceramic material and epoxy resin E-51, including the following steps:

[0029] Step 1: According to the molar ratio of each element in the piezoelectric ceramic molecular formula of the piezoelectric ceramic fiber composite material to be prepared, the piezoelectric ceramic powder is prepared, and then the piezoelectric ceramic powder is made into a casting slurry, which is formed by tape casting A cast thick film with a thickness of 300 μm was prepared by the method, and then a ceramic sheet of the required size was cut with a paper knife, and a square ceramic sheet with a size of 45×10×0.35 mm was prepared by sintering;

[0030] Step 2: Select 67 sintered ceramic sheets, align and arrange their four sides, and fix them on both sides with a square object as a fixture, so that the ceramic sheets are kept in a vertical arrangement;

[0031] Step 3: Cut ...

Embodiment 2

[0037] This example is a method for preparing a 1-1 type piezoelectric fiber composite material using PZT5H piezoelectric ceramic fiber and epoxy resin E-51, the steps are as follows:

[0038] Step 1: Select 67 PZT5H square ceramic pieces with a size of 45×13.5×0.3mm, align and arrange their four sides, and fix them on both sides with a square object as a fixture to keep the ceramic pieces vertically arranged;

[0039] Step 3: Cut the PE film with a thickness of 110 μm into long strips, and cut the bottom into sharp corners, then insert the PE film into the gap between the ceramic sheets in sequence, and keep the ceramic sheet and the PE film tightly with appropriate pressure to form a ceramic- PE stack;

[0040] Step 4: Weigh 10g of epoxy resin E-51 and 8g of polyamide PA650 with an electronic scale, mix and stir them evenly, and make a light yellow colloid;

[0041] Step 5: Choose a square disposable plastic container with a flat bottom, the size is 57×57×45mm, apply a laye...

Embodiment 3

[0045] This embodiment is a piezoelectric ceramic fiber composite material, including 50 parallel piezoelectric ceramic sheets, the distance between each piezoelectric ceramic sheet is 100 μm, and a polymer material is arranged between adjacent piezoelectric ceramic sheets. A polymer layer, and the shape of the piezoelectric ceramic sheet is the same as that of the polymer layer of the polymer material, wherein the polymer layer of the polymer material is a solid mixture of epoxy resin and polyamide.

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Abstract

The invention relates to a 1-1 type piezoelectric ceramic fibrous composite material. The composite material is formed by cutting an alternative lamination of a piezoelectric ceramic sheet and a high molecular material polymer. The invention also provides a method for preparing the 1-1 type piezoelectric ceramic fibrous composite material, comprising the following steps: sintering by using a ceramic powder tape-casting method to obtain piezoelectric ceramic sheets; vertically arranging a certain amount of the piezoelectric ceramic sheets in parallel, and inserting PE (Polyethylene) thin film between every two piezoelectric ceramic sheets to form a piezoelectric ceramic stack; injecting epoxy resin casting liquid to a gap of the piezoelectric ceramic stack, finally, pressurizing, raising the temperature and demoulding to obtain 2-2 type piezoelectric ceramic composite lamination, and cropping and preparing the 1-1 type piezoelectric ceramic fibrous composite material with required size. The 1-1 type piezoelectric ceramic fibrous composite material obtained by using the method can be used as a driver applied to the fields such as structure control, vibration abatement, structure health monitoring and the like after being polarized by an interdigital electrode and has a wide application prospect.

Description

technical field [0001] The invention relates to a piezoelectric ceramic fiber composite material, and at the same time relates to a preparation method of a piezoelectric ceramic fiber composite material, in particular to a preparation method of a piezoelectric ceramic composite material composed of a piezoelectric ceramic material and a polymer material. Background technique [0002] The intelligent structure is proposed relative to the traditional passive structure. It uses intelligent materials as sensing elements and driving elements. A type of structure that identifies the cause and then adopts the corresponding optimal or near-optimal control law to make a reasonable response. At present, piezoelectric ceramics are mostly used in the driving part of intelligent structures. With the progress of research and application, it is found that there are many defects in piezoelectric ceramic materials. For example: it is prone to brittle fracture, special care should be taken i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/187H01L41/22H01L41/37
Inventor 朱孔军李世成裘进浩季宏丽
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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