Supercharge Your Innovation With Domain-Expert AI Agents!

Sodium potassium lithium niobate-bismuth potassium sodium zirconate-bismuth scandate ternary leadless piezoelectric ceramic

A technology of bismuth scandate ternary system and bismuth sodium potassium zirconate is applied in the preparation of lead-free piezoelectric ceramics, potassium sodium lithium niobate-bismuth sodium potassium zirconate-bismuth scandate ternary system lead-free piezoelectric ceramics It can solve problems such as ensuring a higher Curie temperature, and achieve the effect of widening the temperature range, easy implementation, and widening the application range.

Active Publication Date: 2017-08-29
CHENGDU UNIV OF INFORMATION TECH
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: ceramics in the prior art cannot still guarantee higher Curie temperature under the situation of increasing piezoelectric constant, the purpose is to provide potassium niobate sodium lithium-bismuth sodium potassium zirconate - Bismuth scandate ternary system lead-free piezoelectric ceramics, which can effectively guarantee a higher Curie temperature under the condition of increasing the piezoelectric constant

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
  • Sodium potassium lithium niobate-bismuth potassium sodium zirconate-bismuth scandate ternary leadless piezoelectric ceramic
  • Sodium potassium lithium niobate-bismuth potassium sodium zirconate-bismuth scandate ternary leadless piezoelectric ceramic
  • Sodium potassium lithium niobate-bismuth potassium sodium zirconate-bismuth scandate ternary leadless piezoelectric ceramic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Potassium sodium lithium niobate-bismuth sodium potassium zirconate-bismuth scandate ternary system lead-free piezoelectric ceramics, the general structure of which is: (0.995-x)(K 0.5 Na 0.5 ) 0.97 Li 0.03 NbO 3 -xBi 0.5 (Na 0.8 K 0.2 ) 0.5 ZrO 3 -0.005BiScO 3 , where x=0.00 (sample 1).

[0037] The preparation method of the above-mentioned lithium potassium niobate-sodium bismuth zirconate-bismuth scandate ternary system lead-free piezoelectric ceramic is as follows:

[0038] (1) Ingredients:

[0039] with K 2CO 3 、Na 2 CO 3 , Li 2 CO 3 , Nb 2 o 5 、 Bi 2 o 3 、Sc 2 o 3 As a raw material, according to the chemical formula 0.995 (K 0.5 Na 0.5 ) 0.97 Li 0.03 NbO 3 -0.005BiScO 3 To weigh ingredients;

[0040] (2) Preparation:

[0041] The prepared raw materials are mixed with absolute ethanol as the ball milling medium, and the rolling ball milling method is used to mix them evenly and then dry to obtain powder; heat the obtained powder at 700...

Embodiment 2

[0043] The difference between this embodiment and Embodiment 1 is: in this embodiment, x=0.02 (sample 2), and the piezoelectric ceramic general formula is 0.975 (K 0.5 Na 0.5 ) 0.97 Li 0.03 NbO 3 -0.02Bi 0.5 (Na 0.8 K 0.2 ) 0.5 ZrO 3 -0.005BiScO 3 .

[0044] In the preparation method of the present embodiment: with K 2 CO 3 、Na 2 CO 3 , Li 2 CO 3 , Nb 2 o 5 、 Bi 2 o 3 、Sc 2 o 3 , ZrO 2 As a raw material, the ceramic green sheet after debinding is heat-preserved and sintered at 1080° C. for 2 to 5 hours to obtain ceramics.

Embodiment 3

[0046] The difference between this embodiment and embodiment 2 is that in this embodiment, x=0.03 (sample 3), and the general formula of the piezoelectric ceramic is 0.965 (K 0.5 Na 0.5 ) 0.97 Li 0.03 NbO 3 -0.03Bi 0.5 (Na 0.8 K 0.2 ) 0.5 ZrO 3 -0.005BiScO 3 .

[0047] In the preparation method of this embodiment: the ceramic green sheet after debinding is heat-preserved and sintered at 1090° C. for 2-5 hours to obtain ceramics.

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
Curie temperatureaaaaaaaaaa
Login to View More

Abstract

The invention discloses a sodium potassium lithium niobate-bismuth potassium sodium zirconate-bismuth scandate ternary leadless piezoelectric ceramic. The problem that the ceramic cannot maintain a high Curie temperature under a high piezoelectric constant is solved. The piezoelectric ceramic disclosed by the invention has the following general formula: (0.995-x)(K0.5Na0.5)0.97Li0.03NbO3-xBi0.5(Na0.8K0.2)0.5ZrO3-0.005BiScO3, wherein x is more than or equal to 0 and less than or equal to 0.06. The piezoelectric ceramic disclosed by the invention is excellent in piezoelectric property and high in Curie temperature, and the temperature application range of the ceramics is widened.

Description

technical field [0001] The invention relates to the field of lead-free piezoelectric ceramics, in particular to the lead-free piezoelectric ceramics of potassium sodium lithium niobate-bismuth sodium potassium zirconate-bismuth scandate ternary system, and discloses a preparation method of the lead-free piezoelectric ceramics . Background technique [0002] Piezoelectric ceramics have a wide range of applications in the detection, conversion and storage of information such as electricity, magnetism, light, sound, heat and force due to their excellent properties such as ferroelectricity, piezoelectricity and dielectricity, and have penetrated into national security and national economy. various fields. However, most of the piezoelectric ceramics currently on the market are lead-based piezoelectric ceramics, and the lead oxide in the raw materials is poisonous and its content is more than 60%. It will cause serious harm to the environment and human health during the disposal...

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
IPC IPC(8): C04B35/495C04B35/64
CPCC04B35/495C04B35/64C04B2235/3201C04B2235/3224C04B2235/3244C04B2235/3298
Inventor 陈敏吴波吴文娟
Owner CHENGDU UNIV OF INFORMATION TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com