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Preparation method of piezoelectric ceramics-polymer composite material

A technology of piezoelectric ceramics and composite materials, which is applied in the field of acoustic materials, can solve the problems of difficult preparation of large-area 2-2 or 1-3 composite materials and ceramic substrates for acoustic transducers, and achieve high reliability, Ease of operation and simple equipment

Inactive Publication Date: 2012-10-24
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (3) Due to the difficulty in the preparation of ceramic substrates with large areas (such as disc diameters above 8cm), it is extremely difficult to prepare large-area 2-2 or 1-3 composite materials required for acoustic transducers.

Method used

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  • Preparation method of piezoelectric ceramics-polymer composite material
  • Preparation method of piezoelectric ceramics-polymer composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Mix 6g of acrylamide (AM), 2g of N,N'-methylenebisacrylamide (MBAM), 350g of lead zirconate titanate powder and 2g of dispersant sodium polyacrylate with 50g of deionized water to obtain a high solid phase For low-viscosity ceramic slurry, after vacuuming and defoaming, add 1.5μg initiator and 15μl catalyst, stir evenly, pour it into a circular mold with a diameter of 11cm, and place it in an oven at 60°C for 10 hours. After the ceramic slurry is cured The mold was demoulded to obtain a ceramic green body with a strength greater than 10 MPa. Two column arrays with a side length of 800 μm were cut vertically and horizontally on the green body, and then sintered at 1260° C. for 3 hours. After cooling, the sintered body is filled with epoxy resin, cured at room temperature for 48 hours, and the base is cut off to obtain a 1-3 piezoelectric composite material.

Embodiment 2

[0033] Mix 15g of acrylamide (AM), 5g of N,N'-methylenebisacrylamide (MBAM), 200g of lead zirconate titanate powder and 2g of dispersant sodium polyacrylate with 30g of deionized water to obtain a high solid phase For low-viscosity ceramic slurry, after vacuuming and defoaming, add 1.5μg initiator and 20μl catalyst, stir evenly, pour it into a circular mold with a diameter of 9cm, and place it in an oven at 60°C for 10 hours. After the ceramic slurry is cured Remove the mold to obtain a ceramic green body with a strength greater than 10 MPa, cut a row of 700 μm parallel grooves on the green body, and then heat-preserve and sinter at 1260° C. for 3 hours. The sintered body is filled with epoxy resin, and the base is cut off to obtain a 2-2 piezoelectric composite material.

Embodiment 3

[0035] Add 1.5g of gelatin to 25g of deionized water, heat to 40°C and stir. After the gelatin is completely dissolved, add 170g of niobium magnesium zirconate lead ceramic powder and 2g of dispersant sodium polyacrylate, continue stirring evenly, and then mix and ball mill to obtain high-solids The relatively low-viscosity ceramic slurry, after vacuum defoaming, is poured into a circular mold with a diameter of 8 cm, and left at room temperature for one day, and the ceramic slurry is solidified and demolded to obtain a ceramic green body with a strength greater than 10 MPa, which is cut into A row of grooves of 500 μm parallel to each other, followed by sintering at 1200° C. for 4 hours. The sintered body is filled with polyurethane, and the base is cut off to obtain a 2-2 piezoelectric composite material.

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Abstract

The invention relates to a preparation method of a piezoelectric ceramics-polymer composite material. The method is characterized in that ceramic powder, a dispersant and a curing agent system are added are added in water for mixing, a reaction is initiated to prepare the piezoelectric ceramics biscuit with the strength greater than 10 MPa, and processes of cutting and sintering are carried out. The method comprises the following steps: 1) removing water of the ceramic powder, the dispersant, the curing agent system and fully mixing, defoaming, performing a gel reaction on the ceramic slurry under certain temperature and solidifying to obtain the piezoelectric ceramics gel biscuit with strength greater than 10MPa; and 2) cutting the piezoelectric ceramics biscuit from the step 1), sintering, then filling the polymer, solidifying under room temperature and cutting a pedestal to obtain 1-3 or 2-2 piezoelectric ceramics polymer composite material. The method has the advantages of high reliability, simple required equipment, simple operation, and can be used for preparing the ceramic-polymer piezoelectric composite material with large area and less defect crack.

Description

technical field [0001] The invention relates to the field of acoustic materials, in particular, the invention relates to a preparation method of a piezoelectric ceramic-polymer composite material. Background technique [0002] The forward and reverse piezoelectric effect of piezoelectric materials, which can convert mechanical energy and electrical energy, makes it widely used in various acoustic transducers, microelectrode systems and sensors. The most widely used mainstream piezoelectric material is piezoelectric ceramics, which have excellent piezoelectric performance, but have high density, high acoustic impedance, and poor acoustic impedance matching with the human body and water, which seriously affects its application in underwater acoustic transducers and medical applications. Applications in Ultrasound Imaging. Piezoelectric composites are piezoelectric materials made by embedding inorganic piezoelectric ceramic materials in different ways in organic polymer base m...

Claims

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Application Information

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IPC IPC(8): C04B35/622C04B35/632
Inventor 郭栋陈哲夏金东赵高磊
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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