Lead lutecium niobate-lead zirconate titanate piezoceramic material

A technology of piezoelectric ceramics and lead zirconate titanate, which is applied in the direction of piezoelectric/electrostrictive/magnetostrictive devices, circuits, electrical components, etc., can solve the problems of no application and difficult growth of ferroelectric single crystal

Active Publication Date: 2012-08-29
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to find a new type of ferroelectric material and study its preparation process for the above-mentioned problems, so as to solve the problem that the existing

Method used

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  • Lead lutecium niobate-lead zirconate titanate piezoceramic material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. Weigh Lu according to the stoichiometric ratio 2 o 3 , Nb 2 o 5 , adding absolute ethanol as the medium, planetary ball milling for 12 hours, drying at 120°C, and calcining at 1150°C for 1.5 hours to obtain the precursor LuNbO 4 .

[0021] 2. According to the general formula (1-x-y)Pb(Lu 1 / 2 Nb 1 / 2 )O 3 -xPbZrO 3 -yPbTiO 3 , where x=0.40 and y take values ​​of 0.40, 0.44, 0.45, 0.46, 0.47, 0.48, 0.50 respectively. Weigh LuNbO according to the stoichiometric ratio 4 , ZrO 2 ,TiO 2 . Let weigh more than 3% of the stoichiometric PbO to compensate for its volatilization during the sintering process; add absolute ethanol as a medium, and grind the planetary ball for 24 hours.

[0022] 3. The output is dried, and the dried mixture is compressed into Al 2 o 3 In a crucible, it was synthesized at 800°C for 6 hours.

[0023] 4. Crush the synthetic material, use absolute ethanol as the medium, and planetary ball mill again for 12 hours to make it evenly mixed. ...

Embodiment 2

[0031] 1. Weigh Lu according to the stoichiometric ratio 2 o 3 , Nb 2 o 5 , adding absolute ethanol as the medium, planetary ball milling for 12 hours, drying at 120°C, and calcining at 1150°C for 1.5 hours to obtain the precursor LuNbO 4 .

[0032] 2. According to the general formula (1-x-y)Pb(Lu 1 / 2 Nb 1 / 2 )O 3 -xPbZrO 3-yPbTiO 3 , where x=0.25 and y take values ​​of 0.41, 0.42, 0.43, 0.45, 0.46, 0.47, 0.48 respectively. Weigh LuNbO according to the stoichiometric ratio 4 , ZrO 2 ,TiO 2 . Let weigh more than 3% of the stoichiometric PbO to compensate for its volatilization during the sintering process; add absolute ethanol as a medium, and grind the planetary ball for 24 hours.

[0033] 3. The sintering temperature is set at 1100°C for 2.5 hours.

[0034] 3. All the other are with embodiment 1.

Embodiment 3

[0036] 1. Weigh Lu according to the stoichiometric ratio 2 o 3 , Nb 2 o 5 , adding absolute ethanol as the medium, planetary ball milling for 12 hours, drying at 120°C, and calcining at 1150°C for 1.5 hours to obtain the precursor LuNbO 4 .

[0037] 2. According to the general formula (1-x-y)Pb(Lu 1 / 2 Nb 1 / 2 )O 3 -xPbZrO 3 -yPbTiO 3 , where x=0.10 and y take values ​​of 0.40, 0.43, 0.44, 0.45, 0.46, 0.47, 0.48, 0.50 respectively. Weigh LuNbO according to the stoichiometric ratio 4 , ZrO 2 ,TiO 2 . Let the PbO exceeding the stoichiometric ratio of 3% be weighed; add absolute ethanol as a medium, and planetary ball mill for 24 hours.

[0038] 3. The sintering temperature is set at 1020° C. for 2.5 hours.

[0039] 3. All the other are with embodiment 1.

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Abstract

The invention relates to a lead lutecium niobate-lead zirconate titanate piezoceramic material. The performance is represented through powder diffraction, a scanning electron microscope, dielectric, piezoelectric and ferroelectric measurement, so the morphotropic phase boundary region of a ternary system is determined and the component 43Pb (Lu1/2Nb1/2) O3-10PbZrO3-47PbTiO3 with the best performance in the morphotropic phase boundary region is obtained, wherein the piezoelectric coefficient d33 is equal to 367 pC/N and Tc is equal to 360 DEG C; the electromechanical coupling property kp is equal to 68 percent; the coercive field Ec is equal to 17 kv/cm; and the residual polarization Pr is equal to 34.45 uC/cm2. The requirement of high technology application such as high-powder sensors, high-strain drivers and the like on the performance of the piezoelectric material can be met, and the requirement of high technology application such as high-powder sensors, high-strain drivers and the like on the using temperature of the piezoelectric material can also be met.

Description

technical field [0001] The invention relates to a novel piezoelectric ceramic composition and a preparation method of the piezoelectric ceramic composition. The chemical formula of the piezoelectric ceramic composition is (1-x-y)Pb(Lu 1 / 2 Nb 1 / 2 )O 3 -xPbZrO 3 -yPbTiO 3 , abbreviated as PLuN-PZ-PT. The material is a piezoelectric composite material with a quasi-isomorphic phase boundary structure and a Curie temperature comparable to that of PZT ceramics. It belongs to the field of functional ceramics. The piezoelectric ceramic composition is suitable for piezoelectric ceramic components such as piezoelectric ceramic filters, piezoelectric ceramic oscillators, piezoelectric ceramic oscillators and the like. Background technique [0002] Ferroelectric / piezoelectric materials are widely used in various functional devices, such as sensors, transducers, sonar, drivers, filters, micro-speakers, etc., due to their excellent electromechanical conversion performance and fast ...

Claims

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Application Information

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IPC IPC(8): C04B35/50C04B35/493C04B35/491C04B35/622H01L41/187
Inventor 龙西法李涛李修芝王祖建刘颖何超沈东全
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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