Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Lead-free piezoceramic-polyvinyl alcohol (PVA) piezoelectric composite material and preparation method thereof

A technology of polyvinyl alcohol piezoelectric, piezoelectric composite materials, applied in material selection for piezoelectric devices or electrostrictive devices, manufacturing/assembly of piezoelectric/electrostrictive devices, piezoelectric devices/electrostrictive Devices, etc., can solve problems such as human and ecological environment damage, and achieve good piezoelectric and dielectric properties, simple process, and easy-to-obtain materials

Inactive Publication Date: 2010-03-03
SICHUAN UNIV
View PDF0 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because lead in lead-based ceramics and ceramics and polymer materials will cause serious damage to humans and the ecological environment

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Lead-free piezoceramic-polyvinyl alcohol (PVA) piezoelectric composite material and preparation method thereof
  • Lead-free piezoceramic-polyvinyl alcohol (PVA) piezoelectric composite material and preparation method thereof
  • Lead-free piezoceramic-polyvinyl alcohol (PVA) piezoelectric composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] According to formula (1-x)(K b Na 1-b )NbO 3 -xLiSbO 3 (x=0.05, b=0.5) mix ceramic powder raw material, make piezoelectric composite material sample with PVA again by following volume percentage, its XRD collection of patterns is as follows figure 1 As shown, the performance parameters of the test are shown in Table 1:

[0034] Table 1

[0035] KNNLS and PVA body

Embodiment 2

[0037] According to formula (1-x)(K b Na 1-b )NbO 3 -xLiNbO 3 (x=0.06, b=0.48) mix ceramic powder raw material, make piezoelectric composite material sample with PVA again by following volume percentage, its XRD collection of patterns is as follows figure 2 As shown, the performance parameters of the test are shown in Table 2:

[0038] Table 2

[0039] KNLN and PVA

Embodiment 3

[0041] According to formula (1-x)(K b Na 1-b )NbO 3 -xBiScO 3 -yMnCO 3 (x=0.02, b=0.5, y=0.008) mix ceramic powder raw material, make piezoelectric composite material sample with PVA again by following volume percentage, its XRD collection of patterns is as follows image 3 As shown, the performance parameters of the test are shown in Table 3:

[0042] table 3

[0043] KNNBSM and PVA

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
piezoelectric charge coefficientaaaaaaaaaa
Login to View More

Abstract

The invention relates to a potassium-sodium niobate based lead-free piezoceramic-polyvinyl alcohol (PVA) piezoelectric composite material and a preparation method thereof. The preparation method comprises the following steps: mixing materials according to a formula (1-x)(LiaNabK1-a-b)(Nb1-cSbc)O3-xABO3-yM, adopting analytical pure anhydrous carbonate or oxide as the raw material, and using the traditional ceramic preparation technique to prepare ceramic powder; mixing the ceramic powder and polyvinyl alcohol into mixed powder according to a volume ratio of 5 / 90 to 95 / 5, adding deionized waterto the mixed powder and heating to dissolve the PVA; and then carrying out ultrasonic dispersion, drying the mixed powder, then conducting cold-pressing and forming by a sheet-pressing machine, then using a muffle furnace for heating treatment, finally sputtering metal electrodes on the surface thereof, carrying out silicon oil bath for polarization, finally obtaining the potassium-sodium niobatebased lead-free piezoceramic-polyvinyl alcohol piezoelectric composite material. The piezoelectric composite material is pure perovskite crystal phase, has no mixed phase and has good piezoelectric performance and dielectric property.

Description

technical field [0001] The invention relates to a preparation technology of a piezoelectric composite material, in particular to a piezoelectric composite material of potassium sodium niobate (KNN) lead-free piezoelectric ceramics and polyvinyl alcohol (PVA) and a preparation method thereof, belonging to piezoelectric composite field of materials technology. Background technique [0002] Polymer-based piezoelectric composites have good flexibility and machinability, and can be processed into large-area sheets or complex shapes. The polymer-based piezoelectric composite material has a small density ρ, a low sound velocity υ, and a low acoustic impedance Z=ρυ, which is easy to achieve acoustic impedance matching with underwater acoustics and biological tissues. Polymer-based piezoelectric composites due to the dielectric constant (ε 33 ) is low, and the piezoelectric voltage coefficient g 33 high. Compared with polymers, polymer-based piezoelectric composites have higher p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/22H01L41/18H01L41/08C04B26/04C08L29/04C08K3/24H10N30/00H10N30/092H10N30/85
Inventor 朱基亮李绪海王明松蒋猛朱建国肖定全
Owner SICHUAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com