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

Bismuth-sodium titanate-bismuth potassium titanate barium zirconate titanate lead free piezoelectric ceramics

A technology of bismuth potassium titanate and barium zirconate titanate, which is applied in the field of bismuth sodium titanate-bismuth potassium titanate-barium zirconate titanate lead-free piezoelectric ceramics, can solve the problem of lead-free piezoelectric ceramics preparation and performance that have not been reported and other problems, to achieve the effect of excellent piezoelectric ferroelectric performance, excellent piezoelectric ferroelectric performance, and process stability

Inactive Publication Date: 2006-01-04
TSINGHUA UNIV
View PDF5 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation and performance of the BNT-BKT-BZT ternary system lead-free piezoelectric ceramics have not been reported yet.

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
  • Bismuth-sodium titanate-bismuth potassium titanate barium zirconate titanate lead free piezoelectric ceramics
  • Bismuth-sodium titanate-bismuth potassium titanate barium zirconate titanate lead free piezoelectric ceramics
  • Bismuth-sodium titanate-bismuth potassium titanate barium zirconate titanate lead free piezoelectric ceramics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0014] According to 0.9((1-z)Bi 1 / 2 Na 1 / 2 TiO 3 -zBi 1 / 2 K 1 / 2 TiO 3 )-0.1Ba(Zr y Ti1-y )O 3 The theoretical content of the ratio, referring to the MPB position of BNT-BKT, using Na 2 CO 3 、 Bi 2 o 3 、BaCO 3 、K 2 CO 3 、TiO 2 and ZrO 2 Analytical pure powder raw materials, according to the composition shown in Table 1, specifically according to the weight of each group shown in Table 3, after accurate weighing, the groups are ball milled with anhydrous ethanol as the ball milling medium, dried at 70°C, and pressed into discs, at 800-950°C Synthesize at ℃ temperature for 2 hours, sieve 200 meshes, add 0.5-1.5ml of 3wt% PVA solution per 10g of mixture as binder, press under 150MPa pressure to form 10mm in diameter and 1-1.5mm in thickness Discs were incubated at 1150°C for 3h. The fired samples were polished and covered with silver electrodes. The fired samples were polarized at 4kV / mm in silicone oil at 80°C. After 20 minutes of polarization, the electric field ...

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 pointaaaaaaaaaa
piezoelectric charge coefficientaaaaaaaaaa
Curie pointaaaaaaaaaa
Login to View More

Abstract

The present invention discloses a kind of environment friendly lead-free bismuth sodium titanate-bismuth potassium tatanate-barium zirconate titanate piezoelectric ceramic in functional ceramic preparing technology. The lead-free piezoelectric ceramic has the general expression of (1-x)Bi1 / 2(Na1-zKz)1 / 2TiO3-xBa(ZryTi1-y)O3, where, x is BZT molar content, y is atom number of Zr to replace Ti in BaTiO3, z is atom number of K to replace Na in BaNaO3, x is 0-0.1, y is 0-0.10 and z is 0-0.05. The lead-free piezoelectric ceramic may be prepared with industrial materials and through traditional piezoelectric ceramic preparing technological process. The lead-free piezoelectric ceramic has d33 up to 16pC / N, Curie temperature up to 270 deg c and practical application value.

Description

technical field [0001] The invention belongs to the technical field of functional ceramic preparation. In particular, the invention relates to a kind of lead-free piezoelectric ceramics of sodium bismuth titanate-potassium bismuth titanate-barium zirconate titanate with calcium state ore structure and environment coordination. Background technique [0002] Piezoelectric ceramics are an important class of high-tech new materials with fierce international competition. They are widely used in high-tech fields such as information, laser, navigation, and biology. However, the piezoelectric ceramics used on a large scale are mainly lead-based piezoelectric ceramics. , that is, PbTiO 3 -PbZrO 3 , PbT i o 3 -PbZrO 3 -ABO 3 (ABO 3 is a composite perovskite ferroelectric) and PbTiO 3 Piezoelectric ceramics, etc. PbO (or Pb 3 o 4 ) content about 70%. Lead-based piezoelectric materials will bring serious harm to human beings and the ecological environment in the process of 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): C04B35/462C04B35/468C04B35/622
Inventor 李龙土李恩竹褚祥诚
Owner TSINGHUA 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