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

High-electrostriction sodium-bismuth-titanate-base lead-free piezoelectric material and preparation method thereof

A sodium bismuth titanate-based, electrostrained technology, applied in the field of functional ceramics, can solve problems such as narrow operating temperature range

Inactive Publication Date: 2012-08-15
SHANGHAI NORMAL UNIVERSITY
View PDF1 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in general, the overall performance of the current lead-free system is still far behind that of traditional PZT-based materials, such as the piezoelectric coefficient generally does not exceed 300pC / N, and the new lead-free system has problems such as a narrow operating temperature range.

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
  • High-electrostriction sodium-bismuth-titanate-base lead-free piezoelectric material and preparation method thereof
  • High-electrostriction sodium-bismuth-titanate-base lead-free piezoelectric material and preparation method thereof
  • High-electrostriction sodium-bismuth-titanate-base lead-free piezoelectric material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Use high purity Bi 2 o 3 , Na 2 CO 3 , BaCO 3 ,TiO 2 and SrCO 3 As raw material, according to the chemical formula 0.915Bi 0.5 Na 0.5 TiO 3 -0.065BaTiO 3 -0.02SrTiO 3 carry out ingredients;

[0028] Use absolute ethanol as the medium, use a planetary mill to wet grind for 6 hours, dry at 90°C to obtain a dry powder, pre-burn the dried raw material in air at 850°C for 2 hours, and grind to obtain a solid solution raw material;

[0029] Use anhydrous ethanol as the medium to carry out secondary wet grinding for 6 hours, and obtain finely ground raw materials after drying, and use dry pressing method for molding;

[0030] Sinter the molded piece in air at 1200°C for 2 hours to obtain a dense BNBST ceramic piece.

Embodiment 2

[0032] The steps of this embodiment are basically the same as those of Embodiment 1, the difference is that according to the chemical formula 0.855Bi 0.5 Na 0.5 TiO 3 -0.065BaTiO 3 -0.08SrTiO 3 Proceed to the ingredients.

Embodiment 3

[0034] The steps of this embodiment are basically the same as those of Embodiment 1, except that according to the chemical formula 0.835Bi 0.5 Na 0.5 TiO 3 -0.065BaTiO 3 -0.10SrTiO 3 Proceed to the ingredients.

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
Peak temperatureaaaaaaaaaa
Remanent polarizationaaaaaaaaaa
Coercive fieldaaaaaaaaaa
Login to View More

Abstract

The invention discloses a high-electrostriction sodium-bismuth-titanate-base lead-free piezoelectric material. The invention is characterized in that the chemical composition is (0.935-x)Bi0.5Na0.5TiO3-0.065BaTiO3-xSrTiO3, wherein 0<=x<=0.30. On the basis of a binary morphotropic phase boundary (MPB) component solid solution 0.935Bi0.5Na0.5TiO3-0.065BaTiO3, SrTiO3 is introduced to prepare a ternary system solid solution, thereby preparing a high-electromechanical-responsiveness lead-free system. Compared with the existing lead-free system, the invention can disclose the MPB component of the ternary solid solution, obtain the high-electrostriction system, can acquire high strain capacity in a small electric field, and is prospected to be applied to novel environment-friendly solid state drives.

Description

technical field [0001] The invention belongs to the field of functional ceramics, in particular to a bismuth sodium titanate-based lead-free piezoelectric material with high electrical strain and a preparation method thereof, which is a novel environment-friendly piezoelectric material with high electrical strain. Background technique [0002] As materials sensitive to electricity, sound, force, heat, and light, ferroelectric and piezoelectric materials can realize the conversion between electrical energy and mechanical energy, and have been widely used in military and civilian fields such as drives, transducers, and sensors. However, for a long time, PZT-based multi-element lead-containing ceramic materials have been dominant, which poses great harm to the human body and the external environment. Research and development of new high-performance lead-free piezoelectric material systems, and then obtain high electromechanical The conversion system has become one of the resear...

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): C04B35/475C04B35/622
Inventor 王飞飞石旺舟徐敏金成超姚其容
Owner SHANGHAI NORMAL UNIVERSITY
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