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A lead-free piezoelectric ceramic with giant piezoelectric response and preparation method thereof

A technology of lead-free piezoelectricity and piezoelectric effect, applied in the field of lead-free piezoelectric ceramic materials, can solve the problems that the piezoelectric coefficient of lead-free piezoelectric ceramics stops and is difficult to further improve, and achieves low cost and excellent piezoelectricity. The effect of performance and stable performance

Active Publication Date: 2020-10-09
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

By adjusting the ceramic components to construct the phase boundary, it is widely used to improve the piezoelectric coefficient of ceramics, but the piezoelectric coefficient of lead-free piezoelectric ceramics stops at 600 ~ 700 pC / N, and it is difficult to further improve

Method used

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  • A lead-free piezoelectric ceramic with giant piezoelectric response and preparation method thereof
  • A lead-free piezoelectric ceramic with giant piezoelectric response and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment

[0025] A lead-free piezoelectric ceramic material with giant piezoelectric response, consisting of:

[0026] Ba 0.975 Sr 0.005 Ca 0.02 Ti 0.87 sn 0.12 Cr 0.01 o 3 +0.05wt%Co+0.05wt%Cu.

[0027] The preparation method of above-mentioned ceramic material, concrete steps are as follows:

[0028] (1) Ingredients and mix evenly;

[0029] According to Ba 0.975 Sr 0.005 Ca 0.02 Ti 0.87 sn 0.12 Cr 0.01 o 3 The stoichiometry of the analytically pure raw material CaCO was weighed separately 3 、BaCO 3 , SrCO 3 、Cr 2 o 3 , SnO 2 and TiO 2 , put it into a ball mill tank, use zirconia as the balls and absolute ethanol as the ball mill medium, mix the balls thoroughly for 24 hours, separate the balls, and dry the raw materials at 60°C;

[0030] (2) Pre-burning

[0031] Press the dried powder into a large body, put it into a high-alumina crucible and cover it, and keep it warm at 1200°C for 2 hours to synthesize a solid solution;

[0032] (3) Co coated powder

[0033]...

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Abstract

The invention discloses a lead-free piezoelectric ceramic material with giant piezoelectric response and a preparation method thereof. The material composition is Ba0.975Sr0.005Ca0.02Ti0.87Sn0.12Cr0.01O3+0.05wt%Co+0.05wt%Cu. Specifically, Ba0.975Sr0.005Ca0.02Ti0.87Sn0.12Cr0.01O3 is prepared by solid-phase synthesis, Co and Cu are respectively formed by secondary coating in the form of precipitateon the surface, a special hierarchical subgradient structure is produced by sintering technology, and a giant piezoelectric effect is produced, the properties currently exceed all reported lead-free piezoelectric ceramics. Experimental measurement indicates that the product has excellent piezoelectric properties, the quasi-static piezoelectric constant d33=1820pC / N, piezoelectric strain constant shown as the specification is 2032pm / V, the lead-free piezoelectric ceramic material provided by the invention has the advantages of stable performance and low cost, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a lead-free piezoelectric ceramic material, in particular to a lead-free piezoelectric ceramic material with giant piezoelectric response and a preparation method thereof. Background technique [0002] Piezoelectric material is a kind of intelligent material, which can realize the conversion of mechanical signal and electrical signal, as well as generate electric-driven acoustic wave emission and power output. It is widely used in the preparation of transducers, micro-displacers, sensors, resonators and filters, etc. A series of electronic components is one of the indispensable high-tech new materials. Traditional piezoelectric ceramics are mainly lead-containing lead zirconate titanate (PZT) series materials, and its main component is lead oxide (60~70% or more). Lead oxide is a volatile toxic substance that will cause damage to humans and the ecological environment during production, use and disposal. The volatilization of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/468C04B35/628C04B35/622C04B41/88
CPCC04B35/4682C04B35/622C04B35/62842C04B35/62886C04B35/62894C04B41/5116C04B41/88C04B2235/3208C04B2235/3213C04B2235/3241C04B2235/3293C04B2235/656C04B2235/667C04B2235/96
Inventor 周昌荣曾卫东许积文黎清宁杨玲袁昌来陈国华饶光辉
Owner GUILIN UNIV OF ELECTRONIC TECH