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Piezoelectric material having high piezoelectricity performance and temperature stability in wide temperature range and application thereof

A piezoelectric material, high voltage technology, applied in the field of piezoelectric material, doped PMN-PT material formulation, can solve the problems of unstable piezoelectric performance, difficult to obtain hard doping, complex, etc., to achieve high voltage. The effect of constant, significant application value

Active Publication Date: 2015-02-04
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, studies have shown that PMN-PT materials are difficult to obtain hard doping like PZT due to their complex B-site structure; on the other hand, PMN-PT materials have a ferroelectric-ferroelectric phase transition around 80 °C, The piezoelectric constant near the phase transition point changes drastically with temperature. There are also studies to obtain PIN-PMN-PT materials with high Curie temperature by doping In, and move the ferroelectric-ferroelectric phase transition point to above 100 ° C, to a certain extent This reduces the temperature dependence of the material above room temperature, but its piezoelectric properties are still unstable at low temperatures
Recently, it has also been found that the shear piezoelectric constant d 24 Good temperature stability, but the longitudinal piezoelectric strain constant d 33 and the transverse piezoelectric strain constant d 31 poor temperature stability

Method used

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  • Piezoelectric material having high piezoelectricity performance and temperature stability in wide temperature range and application thereof
  • Piezoelectric material having high piezoelectricity performance and temperature stability in wide temperature range and application thereof
  • Piezoelectric material having high piezoelectricity performance and temperature stability in wide temperature range and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0020] According to 0.63Pb(Mg 1 / 3 Nb 2 / 3 )O 3 -0.35PbTiO 3 -0.02BaTiO 3 +0.005MnO 2 The stoichiometric ratio of +0.005MgO will be PbO, MgCO 3 、TiO 2 , Nb 2 o 5 、BaCO 3 , MnO 2 For batching, deionized water was used as the medium, mixed by a planetary ball mill for 5 hours, the powder was fully dried and synthesized at 850°C for 4 hours, and then planetary ball milled again for 6 hours to obtain the doped PMN-PT ceramic powder; The binder polyvinyl butyral is formed by dry pressing and then sintered at 1150° C. to obtain the piezoelectric material.

[0021] figure 1 For the XRD spectrogram of the piezoelectric material that the present embodiment obtains, by figure 1 It can be seen that the piezoelectric material is a pure phase ABO 3 Structure, no pyrochlore phase.

[0022] figure 2 For the SEM photo of the piezoelectric material that this embodiment obtains, by figure 2 It can be seen that the piezoelectric material has extremely high density.

[0023] ...

Embodiment 2

[0027] According to 0.62Pb(Mg 1 / 3 Nb 2 / 3 )O 3 -0.35PbTiO 3 -0.03BaTiO 3 +0.005MnO 2 The stoichiometric ratio of +0.002MgO+0.003ZnO will PbO, MgCO 3 , ZnO, TiO2 , Nb 2 o 5 、BaCO 3 , MnO 2 For batching, deionized water is used as the medium, mixed by planetary ball mill for 5 hours, the powder is fully dried and synthesized at 850°C for 4 hours, and then planetary ball milled again for 6 hours to obtain the doped PMN-PT ceramic powder; add The binder polyvinyl butyral is formed by dry pressing and then sintered at 1300° C. to obtain the piezoelectric material.

[0028] After testing, the Curie temperature of the piezoelectric material obtained in this example is 162°C, and the piezoelectric d at normal temperature 33 510pC / N; in the temperature range of -75~85℃, d 31 Stabilized at about 175pC / N.

[0029] Figure 5 The piezoelectricity d of the piezoelectric material obtained in this example 31 with d 33 Variation curve with temperature, by Figure 5 It can be see...

Embodiment 3

[0032] According to 0.62Pb(Mg 1 / 3 Nb 2 / 3 )O 3 -0.3PbTiO 3 -0.08BaTiO 3 +0.005MnO 2 The stoichiometric ratio of +0.05MgO+0.03ZnO will PbO, MgCO 3 , ZnO, TiO 2 , Nb 2 o 5 、BaCO 3 , MnO 2 For batching, use deionized water as the medium, mix by ball milling for 5 hours, the powder is fully dried and synthesized at 850°C for 4 hours, and then ball milled again for 6 hours to obtain the doped PMN-PT ceramic powder; add bonding Agent polyvinyl butyral, after dry pressing and sintering at 1200°C, the piezoelectric material is obtained.

[0033] After testing, the Curie temperature of the piezoelectric material obtained in this example is 140°C, and the piezoelectric d at normal temperature 33 It is 400C / N; in the temperature range of -75~85℃, d 31 Stabilized at about 125pC / N.

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Abstract

The invention discloses a piezoelectric material having high piezoelectricity performance and temperature stability in a wide temperature range and an application thereof. The piezoelectric material has a pure ABO3 type perovskite structure without a pyrochlore phase, has the following composition formula of (1-x-y)Pb(Mg1 / 3Nb2 / 3)O3-xPbTiO3-yXTiO3+zM, in the formula, X is at least one of Ca, Ba and Sr, M is at least one of MnO2, ZnO and MgO, 0.29<x<=0.38, 0<y<=0.1, and 0<z<=0.1. A PMN-PT material simultaneously has high piezoelectric constants and near zero temperature coefficient in the wide temperature range, can meet application requirements of the actuator and sensor fields, and has outstanding application values.

Description

technical field [0001] The invention relates to a piezoelectric material with high piezoelectric performance and temperature stability in a wide temperature range and its application, specifically, to a piezoelectric material with a high piezoelectric constant and a near-zero piezoelectric constant in a wide temperature range. The temperature coefficient doped PMN-PT material formula and the application of the material in the field of drivers and sensors belong to the technical field of functional materials. Background technique [0002] Piezoelectric ceramics are a class of information functional materials that can realize force-electric conversion, and are widely used in many fields such as drives and sensors. The widely used piezoelectric ceramics include lead zirconate titanate based piezoelectric ceramics Pb(Zr x Ti 1-x )O 3 (PZT) and lead-based composite perovskite piezoelectric ceramics such as (1-x)Pb(Mg 1 / 3 Nb 2 / 3 )O 3 -xPbTiO 3 (PMN-PT), (1-x)Pb(Zn 1 / 3 Nb ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/499C04B35/622
Inventor 李国荣黄立柱曾江涛赵伟阮伟阮学政赵坤宇程丽红郑嘹赢
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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