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

A preparation method for multilayer piezoelectric ceramics used in a high temperature environment of 482°C

A piezoelectric ceramics, high temperature environment technology, applied in the field of lead-free piezoelectric ceramics, can solve the problem of safe use temperature difficult to reach high temperature environment, etc., achieve the effect of stable piezoelectric performance, stable performance, and meet the requirements of use

Active Publication Date: 2022-06-03
YANGTZE DELTA REGION INST OF TSINGHUA UNIV ZHEJIANG +4
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The piezoelectric ceramics currently on the market are mainly PZT piezoelectric ceramics. Although PZT piezoelectric ceramics have the advantages of high piezoelectric coefficient, stable performance, and high mechanical strength, their Curie temperature T C About 360°C, safe use temperature is difficult to meet the needs of high temperature environment
[0003] Bi layered piezoelectric ceramics is one of the most studied high-temperature piezoelectric ceramic systems. C It is about 780°C, but the low piezoelectric constant limits its application. Researchers have improved its piezoelectric performance by adjusting the composition and optimizing the preparation process, but the piezoelectric performance is still around 30pC / N, and it is likely to have more big breakthrough

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
  • A preparation method for multilayer piezoelectric ceramics used in a high temperature environment of 482°C
  • A preparation method for multilayer piezoelectric ceramics used in a high temperature environment of 482°C
  • A preparation method for multilayer piezoelectric ceramics used in a high temperature environment of 482°C

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] S3, degreasing and sintering: degreasing and sintering the above-mentioned laminated diaphragms.

[0035] S4, polarization and aging: the sintered piezoelectric element is placed in an oil bath of 140-160 ° C, a voltage of 400-800V

[0037] In the S1, the particle size of the high-temperature piezoelectric powder is approximately normal distribution, and D50 is 0.1-0.2 μm.

[0043] In the S3, the sintering temperature is 850-1000 ° C.

[0046] The above slurry is formed into a film with a thickness of about 100 μm on a casting machine to print the film by screen printing.

[0048] The ceramic element was polarized for 30 min in an oil bath at 150°C and at a voltage of 600V, and then kept at 550°C after the polarization was completed.

[0052] Implementation Column 2

[0055] The above-mentioned device was heated to 600 °C at a heating rate of 1 °C / min to exclude organic matter, and then sintered at 1000 °C to obtain a

[0056] The ceramic element was polarized for 30 min in a...

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing multilayer piezoelectric ceramics used in a high-temperature environment of 482°C, which mainly includes the following steps: stirring high-temperature ceramic powder, solvent, dispersant, binder and thickener with a stirrer Uniform preparation of casting slurry; forming a film of a certain thickness through a casting machine and printing the inner electrode, and printing the outer electrode after isostatic lamination; debinding at a low heating rate and sintering ceramics at low temperature; ceramic polarization and high temperature Aging stabilizes the piezoelectric properties. The multilayer piezoelectric ceramics prepared by the method for preparing multilayer piezoelectric ceramics used in a high-temperature environment of 482°C according to the present invention can meet the use requirements of a high-temperature environment, and have good piezoelectric performance, and can be completely used in a high-temperature environment of 482°C , The piezoelectric performance is stable after a long time of heat preservation at a high temperature of 482 ° C; the performance is stable after aging at a high temperature of 550 ° C, meeting the requirements of high temperature environments.

Description

A kind of preparation method of multilayer piezoelectric ceramics used in 482 ℃ high temperature environment technical field The present invention relates to the technical field of lead-free piezoelectric ceramics, in particular to a kind of multi-layer used in 482 ℃ high temperature environment Method for preparing piezoelectric ceramics. Background technique [0002] In recent years, with the further expansion of the application range of piezoelectric materials, in some extreme high temperature environments, the The service performance of porcelain presents new challenges. For example, in the aerospace field, high temperature piezoelectric accelerometers play an important role to function. In July 2006, the United States successfully launched the space shuttle "Discoverer 3", only one wing part was installed with 66 Piezoelectric accelerometers with excellent temperature response are used to closely monitor the working conditions of spacecraft wings. high temperat...

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 Patents(China)
IPC IPC(8): C04B35/622C04B35/495C04B41/88
CPCC04B35/622C04B35/495C04B41/88C04B41/009C04B41/5116C04B41/5122C04B2235/3239C04B2235/3298C04B41/4501
Inventor 龚文谭祥虎耿进锋崔建业聂京凯史昌明姚方周王斌张嵩阳何强秘立鹏樊超田一
Owner YANGTZE DELTA REGION INST OF TSINGHUA UNIV ZHEJIANG
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