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A kind of preparation method of piezoelectric material

A technique for piezoelectric materials and preparation steps, which is applied in the field of piezoelectric material preparation, can solve problems such as poor flexibility of piezoelectric materials, easy aggregation of piezoelectric crystals, and low mechanical strength, and achieve excellent compatibility, uniform dispersion, The effect of high mechanical strength

Active Publication Date: 2018-11-06
如东道博智能设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention: Aiming at the disadvantages of the traditional piezoelectric crystal material being brittle, resulting in poor flexibility and low mechanical strength of the piezoelectric material, and the piezoelectric crystal is easy to agglomerate and has poor compatibility with the polymer matrix, it provides A kind of kiwi fruit juice rich in amino acids is first squeezed, and the juice is soaked with nano-barium titanate to increase the number of surface active groups to provide active sites for natural resin attachment, and then the soaked barium titanate and natural resin peach gum And blending with gum Arabic, under the action of microorganisms, the surface of barium titanate is grafted with natural resin particles to increase the bonding between barium titanate particles and epoxy resin to obtain modified nano barium titanate, and then the modified nano barium titanate Barium titanate and epoxy resin are grinded and blended and then injected into a film, solidified to obtain a piezoelectric material. The piezoelectric material prepared by the present invention has strong flexibility and high mechanical strength, and the piezoelectric crystal is uniformly dispersed in the polymer matrix. Excellent compatibility and broad application prospects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] First, weigh 1 kg of kiwi fruit, peel it, put it into a juice extractor to squeeze the juice for 5 minutes, filter and remove the filter residue to obtain the filtrate, then put the filtrate into a horizontal centrifuge, and centrifuge at 3000r / min for 10 minutes to separate and remove the lower sediment. Obtain the supernatant; then, according to the mass ratio of 1:8, immerse the nano-barium titanate in the above supernatant, and move it into an ultrasonic disperser. After ultrasonic dispersion with a power of 100W for 1 hour, put it in a constant temperature box, at 50°C Stand still for 2 days, after standing, filter to obtain the filter residue, rinse with deionized water 3 times, and air-dry naturally; then mix the above-mentioned air-dried filter residue with peach gum of equal quality and gum arabic of the same quality, Put it into a ceramic tank, then add deionized water 5 times the total mass of the filter residue into the ceramic tank, heat up to 50°C, stir and...

example 2

[0019]First weigh 2kg of kiwi fruit, put it into a juice extractor for 8 minutes after peeling, filter and remove the filter residue to obtain the filtrate, then put the filtrate into a horizontal centrifuge, and centrifuge at a speed of 3500r / min for 13 minutes to separate and remove the lower sediment. Obtain the supernatant; then, according to the mass ratio of 1:8, immerse the nano-barium titanate in the above supernatant, and move it into an ultrasonic disperser. After ultrasonically dispersing with a power of 150W for 2 hours, put it in a constant temperature box, at 55°C Stand still for 3 days, after standing, filter to obtain the filter residue, rinse with deionized water 4 times, and air-dry naturally; then mix the above-mentioned air-dried filter residue with peach gum of equal quality and gum arabic of the same quality, Put it into a ceramic tank, then add deionized water 7 times the total mass of the filter residue into the ceramic tank, heat up to 55°C, stir and mi...

example 3

[0021] First weigh 2kg of kiwi fruit, put it into a juice extractor for 10 minutes after peeling, filter and remove the filter residue to obtain the filtrate, then put the filtrate into a horizontal centrifuge, and centrifuge at a speed of 4000r / min for 15 minutes to separate and remove the lower sediment. Obtain the supernatant; then, according to the mass ratio of 1:8, immerse the nano-barium titanate in the above supernatant, and move it into an ultrasonic disperser, ultrasonically disperse it with a power of 200W for 2 hours, put it in a constant temperature box, and heat it at 60°C Stand still for 3 days, after standing, filter to obtain the filter residue, rinse with deionized water 5 times, and air-dry naturally; then mix the above-mentioned air-dried filter residue with peach gum of equal quality and gum arabic of the same quality, Put it into a ceramic tank, then add deionized water 8 times the total mass of the filter residue into the ceramic tank, heat up to 60°C, st...

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Abstract

The invention discloses a method for preparing a piezoelectric material, and belongs to the technical field of piezoelectric material preparing. The method includes the steps that kiwi-fruit juice rich in amino acid is squeezed, nano-barium titanate is soaked with the juice, the number of active groups on the surface of the nano-barium titanate is increased, active sites are provided for attaching of natural resin, the soaked barium titanate, the natural resin peach gum and arabic gum are mixed, natural resin particles are grafted to the surface of the barium titanate under the effect of microorganisms to improve the combining performance between barium titanate particles and epoxy resin, and modified nano-barium titanate is obtained; the modified nano-barium titanate and the epoxy resin are ground, mixed, subjected to casting and cured, and the piezoelectric material is prepared. The piezoelectric material prepared with the method is high in flexibility and mechanical strength; in addition, piezo-electric crystals are evenly dispersed in a polymer matrix, compatibility is quite good, and broad application prospects are achieved.

Description

technical field [0001] The invention relates to a method for preparing a piezoelectric material, which belongs to the technical field of piezoelectric material preparation. Background technique [0002] Piezoelectric materials are crystalline materials that generate a voltage between their two ends when pressure is applied. The mechanism of the piezoelectric effect is: the crystal with piezoelectricity has low symmetry. When it is deformed by an external force, the relative displacement of the positive and negative ions in the unit cell makes the positive and negative charge centers no longer overlap, resulting in macroscopic polarization of the crystal, while The surface charge surface density of the crystal is equal to the projection of the polarization intensity on the surface normal direction, so when the piezoelectric material is deformed by pressure, charges of opposite signs will appear on the two ends of the piezoelectric material. Conversely, when a piezoelectric m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08K9/04C08K9/08C08K3/24C08J5/18
CPCC08J5/18C08J2363/00C08K3/24C08K9/04C08K9/08C08K2201/011C08L63/00
Inventor 许斌邹宇帆张晶
Owner 如东道博智能设备有限公司