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A lead zirconate titanate-based piezoelectric ceramic material with large displacement and low hysteresis and preparation method thereof

A technology of lead zirconate titanate and ceramic materials, which is applied in the field of functional ceramic materials, can solve the problems of hard piezoelectric ceramics such as polarization difficulties, and achieve the effects of high linearity, low displacement hysteresis, and simple preparation process

Active Publication Date: 2017-08-11
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] In order to solve the problems that the existing piezoelectric ceramics cannot have the characteristics of large displacement and low hysteresis at the same time, and it is difficult to polarize, etc., the present invention provides a lead zirconate titanate-based piezoelectric ceramic material formula, which has large piezoelectric displacement, Low voltage-displacement hysteresis and good linearity; at the same time, the present invention solves the problem of difficult polarization of existing rigid piezoelectric ceramics through high temperature quenching and room temperature polarization processes

Method used

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  • A lead zirconate titanate-based piezoelectric ceramic material with large displacement and low hysteresis and preparation method thereof
  • A lead zirconate titanate-based piezoelectric ceramic material with large displacement and low hysteresis and preparation method thereof
  • A lead zirconate titanate-based piezoelectric ceramic material with large displacement and low hysteresis and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0032] The preparation method of the present invention comprises:

[0033] Step 1) According to Pb 1-x (Sr y Ca 1-y ) x (Zr z Ti 1-z )O 3 +aCa(Fe w Ga 1-w )O 5 / 2 +bMnO 2 General Formula for Accurately Weighing Pb in Stoichiometric Ratio 3 o 4 , SrCO 3 , CaCO 3 , ZrO 2 、TiO 2 , Fe 2 o 3 , Ga 2 o 3 and MnO 2 . Put all raw material powders into a ball mill jar, add deionized water, mix for 4 to 6 hours, pour out and dry;

[0034] Step 2) After sieving and briquetting the uniformly mixed powder, place it in a high-temperature furnace, and synthesize it at 800-950°C for 2-4 hours to obtain the required phase;

[0035] Step 3) crush the synthesized powder, put it into a ball mill jar, add deionized water, ball mill it for 6-8 hours, pour it out and dry it;

[0036] Step 4) Adding PVA to the ball-milled powder as a binder, granulating, pressing and molding under a pressure of 150-250 MPa, and keeping the pressed green body at a temperature of 500-650°C for 2-6 ...

Embodiment 1

[0041] Example 1: Pb 0.90 Sr 0.05 Ca 0.05 Zr 0.53 Ti 0.47 o 3 -0.01CaFeO 5 / 2

[0042] Including the following steps:

[0043] 1) According to Pb 0.90 Sr 0.05 Ca 0.05 Zr 0.53 Ti 0.47 o 3 -0.01CaFeO 5 / 2 General Formula for Accurately Weighing Pb in Stoichiometric Ratio 3 o 4 , SrCO 3 , CaCO 3 , ZrO 2 、TiO 2 , Fe 2 o 3 . Put all raw material powders into a ball mill jar, add deionized water, mix for 4-6 hours, pour out and dry;

[0044] 2) After sieving and briquetting the uniformly mixed powder, place it in a high-temperature furnace and synthesize it at 810°C for 2 hours to obtain the required phase;

[0045] 3) Break the synthesized powder into a ball mill tank, add deionized water, and pour it out for drying after 6 hours of ball milling;

[0046] 4) adding PVA to the ball-milled powder as a binder, granulating, pressing and molding under a pressure of 200 MPa, and keeping the pressed green body at a temperature of 550° C. for 4 hours to discharge the ...

Embodiment 2

[0055] Example 2: Pb 0.90 Sr 0.10 Zr 0.53 Ti 0.47 o 3 -0.008CaFe 0.95 Ga 0.05 o 5 / 2 +0.005MnO 2

[0056] Including the following steps:

[0057] 1) According to Pb 0.90 Sr 0.10 Zr 0.53 Ti 0.47 o 3 -0.008CaFe 0.95 Ga 0.05 o 5 / 2 +0.005MnO 2 General Formula for Accurately Weighing Pb in Stoichiometric Ratio 3 o 4 , SrCO 3 , ZrO 2 、TiO 2 , CaCO 3 , Fe 2 o 3 , Ga 2 o 3 , MnO 2 . Put all raw material powders into a ball mill jar, add deionized water, mix for 4-6 hours, pour out and dry;

[0058] 2) After sieving and briquetting the uniformly mixed powder, place it in a high-temperature furnace and synthesize it at 820°C for 2 hours to obtain the required phase;

[0059] 3) Break the synthesized powder into a ball mill tank, add deionized water, and pour it out for drying after 6 hours of ball milling;

[0060] 4) adding PVA to the ball-milled powder as a binder, granulating, pressing and molding under a pressure of 200 MPa, and keeping the pressed gree...

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Abstract

The invention relates to a lead-zirconate-titanate-based piezoceramic material achieving large displacement and low hysteresis at the same time and a preparation method of the lead-zirconate-titanate-based piezoceramic material. The composition general formula of the piezoceramic material is Pb1-x(SryCa1-y)x(ZrzTi1-z)O3+aCa(FewGa1-w)O5 / 2+bMnO2, wherein x, y, z and w are all molar ratios, x is larger than or equal to 0.05 and smaller than or equal to 0.20, y is larger than or equal to 0 and smaller than or equal to 1, z is larger than or equal to 0.50 and smaller than or equal to 0.55, and w is larger than or equal to 0 and smaller than or equal to 1; a is a molar ratio, on the basis that the total molar number of Pb1-x(SryCa1-y)x(ZrzTi1-z)O3 ceramic powder is 1, a is larger than or equal to 0.005 and smaller than or equal to 0.01, and on the basis that the total weight of the Pb1-x(SryCa1-y)x(ZrzTi1-z)O3 ceramic powder is 1, b is larger than or equal to 0 and smaller than or equal to 0.01. The piezoceramic material achieves the characteristics of large displacement and low hysteresis at the same time, meanwhile, a ceramic electric field-strain curve can meet the application requirements of a high-accuracy piezoelectric actuator, and better application prospects are achieved.

Description

technical field [0001] The invention relates to a piezoelectric ceramic with large piezoelectric displacement and low displacement hysteresis and a preparation method thereof, belonging to the technical field of functional ceramic materials. Background technique [0002] Ferroelectric materials can realize the mutual conversion of mechanical energy and electrical energy, so they are widely used in the fields of transducers, sensors and drives. [1] Among them, the piezoelectric actuator is an action actuator that uses piezoelectric materials to generate micro-displacements under the action of an electric field. Piezoelectric actuators have the advantages of high displacement control precision, fast response speed, and large thrust, and are widely used in many fields such as civil and national defense. [2] [0003] With the advancement of technology, the application range of piezoelectric micro-displacement drivers has gradually expanded. For example, in nano-engineering, hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/491C04B35/622
Inventor 曾江涛李国荣郑嘹赢阮学政程健
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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