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

Method for preparing potassium-sodiumniobate lead-free piezoelectric thick film

A potassium sodium niobate, lead-free piezoelectric technology, applied in the manufacture/assembly of piezoelectric/electrostrictive devices, chemical instruments and methods, inorganic chemistry, etc., can solve the problem of no piezoelectric properties, ferroelectric and piezoelectric Poor performance and other problems, to achieve the effect of not easy to hydrolyze, improve electrical properties, and reduce crystallization temperature

Inactive Publication Date: 2010-09-01
XI AN JIAOTONG UNIV
View PDF2 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ferroelectric and piezoelectric properties of pure KNN films reported so far are generally poor, and typical hysteresis loops are only obtained in KNN films prepared by pulsed laser deposition (PLD) and aerosol deposition (AD). However, there is no report on its piezoelectric properties

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
  • Method for preparing potassium-sodiumniobate lead-free piezoelectric thick film
  • Method for preparing potassium-sodiumniobate lead-free piezoelectric thick film
  • Method for preparing potassium-sodiumniobate lead-free piezoelectric thick film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Molar ratio of NbCl 5 : ethanol=1: Weigh anhydrous niobium chloride and absolute ethanol respectively at 1: 10, first niobium chloride is evenly dispersed in the reaction solvent benzene, after stirring for 1 hour, slowly drop into absolute ethanol, and then stir for 1 hour to promote It was fully reacted, and then passed through ammonia gas for 4 hours to remove the excess ion Cl introduced therein - , the resulting white precipitate NH 4 Cl suction filtration, the obtained filtrate is washed with benzene, and the benzene and excess absolute ethanol are removed by normal pressure distillation to obtain pure stable niobium ethoxide.

[0038] (2) According to K 0.5 Na 0.5 NbO 3 The stoichiometric ratio, additionally taking into account the alkali metal ion K during heat treatment + and Na + The volatilization of the formula is calculated by 10% excess of potassium and sodium, that is, according to the molar ratio formula K:Na:Nb=0.55:0.55:1.00, anhydrous sodium...

Embodiment 2

[0042] (1) Molar ratio of NbCl 5 : ethanol=1: 15 Weigh anhydrous niobium chloride and absolute ethanol respectively, first niobium chloride is evenly dispersed in the reaction solvent benzene, after stirring for 1 hour, slowly drop into absolute ethanol, and then stir for 1 hour to promote It was fully reacted, and then passed through ammonia gas for 4 hours to remove the excess ion Cl introduced therein - , the resulting white precipitate NH 4 Cl suction filtration, the obtained filtrate is washed with benzene, and the benzene and excess absolute ethanol are removed by normal pressure distillation to obtain pure stable niobium ethoxide.

[0043] (2) According to K 0.5 Na 0.5 NbO 3 The stoichiometric ratio, additionally taking into account the alkali metal ion K during heat treatment + and Na + The volatilization of the formula is calculated by 5% excess of potassium and sodium, that is, according to the molar ratio formula K:Na:Nb=0.525:0.525:1.00, anhydrous sodium acet...

Embodiment 3

[0048] (1) Molar ratio of NbCl 5 : ethanol=1: 20 Weigh anhydrous niobium chloride and absolute ethanol respectively, first niobium chloride is evenly dispersed in the reaction solvent benzene, after stirring for 1 hour, slowly drop into absolute ethanol, and then stir for 1 hour to promote It was fully reacted, and then passed through ammonia gas for 4 hours to remove the excess ion Cl introduced therein - , the resulting white precipitate NH 4 Cl suction filtration, the obtained filtrate is washed with benzene, and the benzene and excess absolute ethanol are removed by normal pressure distillation to obtain pure stable niobium ethoxide.

[0049] (2) According to K 0.5 Na 0.5 NbO 3 The stoichiometric ratio, and taking into account the alkali metal ion K during heat treatment + and Na + The volatilization of the formula is calculated by 15% excess of potassium and sodium, that is, according to the molar ratio formula K:Na:Nb=0.575:0.575:1.00, anhydrous sodium acetate, anh...

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 relates to a method for preparing a ferroelectric / piezoelectric thick film in inorganic materials, and discloses a method for preparing a potassium-sodiumniobate (K0.5Na0.5NbO3, KNN) lead-free piezoelectric thick film on the basis of a modified chemical solution coating process. The method comprises the following steps of: (1) preparing niobium ethoxide from anhydrous niobium chloride and absolute ethyl alcohol at low cost; (2) preparing precursor solution of potassium-sodiumniobate from anhydrous sodium acetate, anhydrous potassium acetate and the niobium ethoxide by PVP modification and ion doping technique; and (3) performing repeated coating-thermal treatment to obtain the piezoelectric thick film which is compact, has no cracks and has the thickness between 0.8 and 5 mu m.

Description

technical field [0001] The present invention relates to the preparation method of ferroelectric / piezoelectric thick film in inorganic material, relate in particular to a kind of potassium sodium niobate (K 0.5 Na 0.5 NbO 3 , KNN) preparation method of lead-free piezoelectric thick film, which is based on a modified chemical solution coating process. Background technique [0002] At present, the production of piezoelectric materials is still concentrated on the traditional lead zirconate titanate Pb(Zr,Ti)O 3 (PZT)-based piezoelectric ceramics, but the content of lead oxide in the PZT-based ceramics exceeds 60% of the total mass of raw materials. Lead oxide is a volatile toxic substance, which brings serious harm to human beings and the ecological environment, which is contrary to the sustainable development of human society. [0003] Potassium sodium niobate (KNN), a lead-free piezoelectric material, has attracted widespread attention due to its excellent piezoelectric 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): C01G33/00H10N30/093
Inventor 任巍王玲艳姚姗姗史鹏纪红芬闫兴伟陈晓峰吴小清姚熹
Owner XI AN JIAOTONG 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