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Multi-element piezoelectric composite material and preparation method and application thereof

A piezoelectric composite material and composite material technology, applied in the field of piezoelectric composite materials and their preparation, can solve the problems of complex transducer array methods, waste of raw materials, difficult operation, etc., achieve broad application prospects, simple and consistent preparation process good sex effect

Active Publication Date: 2012-04-25
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional method of preparing a transducer array is complicated and difficult to operate. First, a large number of composite material samples must be prepared, and then material samples with consistent performance must be selected as the primitives of the transducer array. A certain formation is arranged into the desired array
Therefore, it is difficult to meet the high consistency requirements of the transducer array on the performance of each element, and it will waste raw materials, labor and time
This limits the application of transducer arrays to a large extent

Method used

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  • Multi-element piezoelectric composite material and preparation method and application thereof
  • Multi-element piezoelectric composite material and preparation method and application thereof
  • Multi-element piezoelectric composite material and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0063] Using PZT4 piezoelectric ceramic sheet, piezoelectric constant d 33 210pC·N -1 , the electromechanical coupling coefficient K t 49.67%, mechanical quality factor Q m is 48.6, relative permittivity ε r 999, the material thickness is 15.1mm. The polymer adopts epoxy resin with good fluidity (AB grouting resin), and the ratio of epoxy resin to curing agent is 4:1. The decoupling material is HL-2288 silica gel, the filling width is 0.5mm, and the ratio of silica gel to curing agent is 1:0.02. According to the above-mentioned preparation process, the number of primitives is 6 (3×2), and the number of ceramic pillars in each primitive is 9 (3×3). The cross-sectional size of each ceramic pillar is 1.5mm×1.5mm, and the height of the ceramic pillar is The performance of the obtained multi-element piezoelectric composite material is as follows:

[0064] (1) Piezoelectric, dielectric and electromechanical coupling properties

[0065] Table 1 shows the piezoelectric, ...

Embodiment 2

[0073] Using PZT4 piezoelectric ceramic sheet, piezoelectric constant d 33 210pC·N -1 , the electromechanical coupling coefficient K t 49.67%, mechanical quality factor Q m is 48.6, relative permittivity ε r 999, the material thickness is 15.1mm. The polymer adopts epoxy resin (AB grouting resin) with good fluidity, and the mass ratio of epoxy resin to curing agent is 4:1. The decoupling material is HL-2288 silica gel, the filling width is 0.5mm, and the ratio of silica gel to curing agent is 1:0.02. According to the above preparation process, the number of bases is 6 (3×2), the number of ceramic columns in each base unit is 9 (3×3), the cross-sectional size of each ceramic column is 1 mm×1 mm, and the height of the ceramic column is 13.3 mm, the ceramic column volume fraction is 42.06%, and the substrate thickness is 1.8mm. The properties of the multi-element piezoelectric composite obtained are as follows:

[0074] (1) Piezoelectric, dielectric and electromechan...

Embodiment 3

[0083] Using PZT4 piezoelectric ceramic sheet, piezoelectric constant d 33 281pC·N -1 , the electromechanical coupling coefficient K t 34.3%, relative permittivity ε r It is 1121, and the material thickness is 15.5mm. Both the polymer and the decoupling material use HL-2288 silica gel, and the ratio of silica gel to curing agent is 1:0.02. Since the polymer and the decoupling material are the same, one cutting and one filling are sufficient, and the number of bases is 45 (9×5), each base contains 9 ceramic columns (3×3), each The cross-sectional size of the ceramic column is 2mm×2mm, the height of the ceramic column is 13.5mm, the volume fraction of the ceramic column is 64.36%, and the base thickness is 2mm. The performance of the obtained multi-element piezoelectric composite material is as follows:

[0084] (1) Piezoelectric, dielectric and electromechanical coupling properties

[0085] Randomly select 5 primitives (such as Figure 7 shown), the piezoelectric, d...

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Abstract

The invention discloses a multi-element piezoelectric composite material and a preparation method. The multi-element piezoelectric composite material is a 1-3-2 type composite material consisting of a piezoelectric ceramic / polymer composite material and a decoupling material, wherein the piezoelectric ceramic / polymer composite material takes piezoelectric ceramic as a skeleton and a polymer as a base body and is attached with an upper electrode and a lower electrode, the piezoelectric ceramic skeleton comprises a substrate and a piezoelectric ceramic column connected to the substrate, the decoupling material is filled in the piezoelectric ceramic / polymer composite material, the piezoelectric ceramic / polymer composite material is divided into a plurality of units of the same structure by the decoupling material, and the upper electrodes of all elements are discontinuous. Through the adding of the decoupling material, the whole composite material is divided into a plurality of units. The preparation technology is simple. The obtained multi-element material has excellent property, good consistency, low coupling and wide application prospect in the field of transducers.

Description

technical field [0001] The invention relates to a piezoelectric composite material and its preparation method and application, in particular to a multi-element piezoelectric composite material applied to emitting transducer array elements and its preparation method and application. Background technique [0002] Piezoelectric composite material refers to a piezoelectric material formed by combining two-phase or multi-phase materials. It integrates the piezoelectric effect of piezoelectric ceramics and the flexibility of polymers, and overcomes the strength, Defects in brittleness. The 1-3-2 type piezoelectric composite material is a new type of piezoelectric composite material with the structural characteristics of parallel 1-3 type and series 2-2 type composite materials. It has the characteristics of low density, high isostatic piezoelectric performance, easy matching of acoustic impedance with water and biological tissue, stable structure, and material parameters can be c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/16H01L41/22H10N30/092
Inventor 黄世峰叶正茂芦令超徐东宇周美娟程新
Owner UNIV OF JINAN
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