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Lead-bismuth-lithium-titanium-scandium-niobium series piezoelectric ceramic with high Curie temperature and high piezoelectricity property

A technology of piezoelectric ceramics and Curie temperature, applied in the direction of piezoelectric devices/electrostrictive devices, ceramics, inorganic insulators, etc., to achieve the effect of high Curie temperature and excellent piezoelectric performance

Inactive Publication Date: 2007-09-12
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, there is no modified PbTiO 3 After piezoelectric ceramics, its piezoelectric performance can reach the level of PZT piezoelectric ceramics

Method used

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  • Lead-bismuth-lithium-titanium-scandium-niobium series piezoelectric ceramic with high Curie temperature and high piezoelectricity property
  • Lead-bismuth-lithium-titanium-scandium-niobium series piezoelectric ceramic with high Curie temperature and high piezoelectricity property
  • Lead-bismuth-lithium-titanium-scandium-niobium series piezoelectric ceramic with high Curie temperature and high piezoelectricity property

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] By the general formula (1-x) BiScO 3 -xPb (1-y) Li y Ti (1-y) Nb y o 3 The indicated perovskite piezoelectric ceramic content is compared to the material, when x=0.64, y=0.02, its formula is:

[0021] 0.36 BiScO 3 -0.64Pb 0.98 Li 0.02 Ti 0.98 Nb 0.02 o 3

[0022] Sintering temperature

[0023] The 0.36BiScO measured by the GW-I high temperature electrical performance test system manufactured by Xi'an Jiaotong University 3 -0.64PbTiO 3The dielectric constant of piezoelectric ceramics varies with temperature at different frequencies (dielectric temperature map), as shown in Figure 1. It can be seen from the dielectric temperature map that 0.36BiScO 3 -0.64PbTiO 3 The Curie temperature of piezoelectric ceramics is as high as 454°C.

Embodiment 2

[0025] By the general formula (1-x) BiScO 3 -xPb (1-y) Li y Ti (1-y) Nb y o 3 The indicated perovskite piezoelectric ceramic content is compared to the material, when x=0.64, y=0.04, its formula is:

[0026] 0.36 BiScO 3 -0.64Pb 0.96 Li 0.04 Ti 0.96 Nb 0.04 o 3

[0027] Sintering temperature

[0028] Measure 0.36BiScO with Precision Workstation produced by American Radiant Company 3 -0.64Pb 0.96 Li 0.04 Ti 0.96 Nb 0.04 o 3 The piezoelectric ceramic ferroelectric loop diagram, as shown in Figure 2, the ferroelectric loop has a very complete rectangular shape, indicating that titanium scandium lead bismuth niobate lithium piezoelectric ceramics are strong ferroelectrics.

Embodiment 3

[0030] By the general formula (1-x) BiScO 3 -xPb (1-y) Li y Ti (1-y) Nb y o 3 The content of the perovskite piezoelectric ceramics indicated is compared to the material, when x=0.64, y=0.06,

[0031] Its formula is:

[0032] 0.36 BiScO 3 -0.64Pb 0.94 Li 0.06 Ti 0.94 Nb 0.06 o 3

[0033] Sintering temperature

[0034] Using the ZJ-3A quasi-static d produced by the Institute of Acoustics, Chinese Academy of Sciences 33 Measuring instrument and HP4294A precision impedance analyzer produced by American Angilent company to test (1-x) BiScO 3 -xPb (1-y) Li y Ti (1-y) Nb y o 3 Piezoelectric constant d of piezoelectric ceramics 33 and planar electromechanical coupling coefficient k p With the change of y, as shown in Figure 3, it can be seen from Figure 3 that titanium scandium lead bismuth niobate lithium piezoelectric ceramics have excellent piezoelectric properties, and its piezoelectric constant d 33 Up to 465pC / N, planar electromechanical coupling ...

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Abstract

This invention discloses a Ti Sc Pb Bi Li niobate series of piezoelectric ceramic with high Tc and high piezoelectric performance and puts forward a general formula to express the material: (1-x)BiScO3-xPb(1-y)LiyTi(1-y)NbyO3, in which, x and y show the atomic number of related element materials in compound ions in each set, namely, the atom percentage, x is greater than or equal to 0.50 but less than or equal to 0.90, y is greater than or equal to 0 but less than or equal to 0.10, and traditional preparation technology and industrial raw materials can be applied for said piezoelectric ceramics and sintered at 1150deg.C or even lower, which has fine piezoelectric performance and practical plane electromechanical coupled coefficient, its kp is greater than 40%, d33 is over 300pC / N and Tc is greater than 400deg.C.

Description

technical field [0001] The invention relates to the technical field of preparation of functional ceramics, in particular to a new titanium scandium lead bismuth niobate lithium series piezoelectric ceramic material with high Curie temperature and high piezoelectric performance. Background technique [0002] As we all know, piezoelectric ceramics are a class of functional materials that realize the mutual conversion of mechanical energy and electrical energy. Since the 1960s, PZT(Pb(Zr,Ti)O 3 ), or piezoelectric ceramic materials based on PZT mixed with other elements have been widely used in electronics, communications, aerospace, military and other fields. At present, this type of material is still the main material for the preparation of various piezoelectric ceramic filters, oscillators, resonators, frequency discriminators, traps and other electronic components. The Curie temperature T of piezoelectric ceramic materials in PZT systems that have been commercially applied...

Claims

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Application Information

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IPC IPC(8): C04B35/472C04B35/475C04B35/495C04B35/465H01B3/12H01L41/08
Inventor 朱建国陈异肖定全江一杭覃宝全
Owner SICHUAN UNIV
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