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Doped modified lead niobate-lead zirconate titanate piezoelectric ceramic and preparation method thereof

A technology of lead niobate nickelate and lead zirconate titanate, which is applied in the field of piezoelectric ceramics, can solve the problems of inability to meet the practical application requirements of high-power piezoelectric devices, low piezoelectric and dielectric properties, and achieve stable and mature preparation methods. Excellent piezoelectric performance and dielectric performance, and the effect of easy raw material acquisition

Active Publication Date: 2020-09-11
江苏省声学产业技术创新中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sm has been carried out on PNN-PZT piezoelectric ceramics 2 o 3 , ZnO, MnO 2 , Fe 2 o 3 , Y 2 o 3 , ZnO / Li 2 O co-doped, CuO / Fe 2 o 3 Various doping modification studies such as co-doping, but the piezoelectric and dielectric properties of the products obtained after doping are still relatively low, and the piezoelectric coefficient d 33 ≤800pC / N; room temperature relative permittivity ε r ≤6000, still unable to meet the practical application requirements of high-power piezoelectric devices

Method used

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  • Doped modified lead niobate-lead zirconate titanate piezoelectric ceramic and preparation method thereof
  • Doped modified lead niobate-lead zirconate titanate piezoelectric ceramic and preparation method thereof
  • Doped modified lead niobate-lead zirconate titanate piezoelectric ceramic and preparation method thereof

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Effect test

Embodiment 1

[0045] The chemical formula of the lead niobate nickelate-lead zirconate titanate piezoelectric ceramic doped and modified in this implementation is:

[0046] Pb 0.90 Sr 0.10 (Ni 1 / 3 Nb 2 / 3 ) 0.20 (Zr 0.52 Ti 0.48 ) 0.80 o 3 +0.75wt%Sb 2 o 3 +y%PbO+z%NiO, wherein y=3, z=0;

Embodiment 2

[0048] The chemical formula of the lead niobate nickelate-lead zirconate titanate piezoelectric ceramic doped and modified in this implementation is:

[0049] Pb 0.90 Sr 0.10 (Ni 1 / 3 Nb 2 / 3 ) 0.20 (Zr 0.52 Ti 0.48 ) 0.80 o 3 +0.75wt%Sb 2 o 3 +y%PbO+z%NiO, wherein y=0, z=3;

Embodiment 3

[0051] The chemical formula of the lead niobate nickelate-lead zirconate titanate piezoelectric ceramic doped and modified in this implementation is:

[0052] Pb 0.90 Sr 0.10 (Ni 1 / 3 Nb 2 / 3 ) 0.20 (Zr 0.52 Ti 0.48 ) 0.80 o 3 +0.75wt%Sb 2 o 3 +y%PbO+z%NiO, wherein y=3, z=3;

[0053] The X-ray diffraction pattern of the lead niobate nickelate-lead zirconate titanate piezoelectric ceramics prepared in this example is shown in figure 1 , SEM image see figure 2 . Depend on figure 1 It can be seen that no pyrochlore phase or second phase appears, indicating that it has a pure perovskite phase structure. Depend on figure 2 It can be seen that the grain size of the prepared materials ranges from 1 μm to 8 μm, and the grain distribution is uniform, the grain boundaries are clearly visible, the porosity is relatively small, and the ceramic structure is relatively dense.

[0054] d 33 , ε r and Q(Q=d 33 ×ε r ) change map see Figure 4 . from Figure 4 It can be s...

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Abstract

The invention discloses lead nickle niobate-lead zirconate titanate piezoelectric ceramic. The lead nickle niobate-lead zirconate titanate piezoelectric ceramic is prepared from the following chemical components and a chemical formula of the chemical component content is as follows: Pb(1-m)Srm(Ni1 / 3Nb2 / 3)n(Zr0.52Ti0.48)(1-n)O3+xwt%Sb2O3+y%PbO+z%NiO, wherein m is greater than or equal to 0.08, and smaller than or equal to 0.12, n is greater than or equal to 0.1 and smaller than or equal to 0.4, x is greater than or equal to 0.5 and smaller than or equal to 1, y is greater than or equal to 0 and smaller than or equal to 4 and z is greater than or equal to 0 and smaller than or equal to 5; and parameters are further optimized as follows: m equals to 0.1, n is greater than or equal to 0.2 and smaller than or equal to 0.24, x equals to 0.75, y equals to 3 and z is greater than or equal to 0 and smaller than or equal to 4. The invention further provides a preparation method for the lead nickle niobate-lead zirconate titanate piezoelectric ceramic. The modified lead nickle niobate-lead zirconate titanate doped piezoelectric ceramic is remarkably improved in electrical property, and can meet application needs of large-power piezoelectric devices.

Description

technical field [0001] The invention belongs to the field of piezoelectric ceramics, and in particular relates to a doped modified high-performance lead niobate nickelate-lead zirconate titanate piezoelectric ceramic and a preparation method thereof. Background technique [0002] The power type piezoelectric device is a kind of piezoelectric transducer. Its working principle is to use the unique positive and negative piezoelectric effects of ceramic materials, through the secondary conversion of electromechanical energy, and rely on the change of the internal impedance of the device to achieve the resonant frequency. on the application. This requires the piezoelectric device material to have a high piezoelectric coefficient d 33 , high dielectric constant ε r , large electromechanical coupling coefficient k p And low dielectric loss tanδ. PZT (PbZrO 3 -PbTiO 3 , lead zirconate titanate) based piezoelectric material due to its high d 33 and k p And be widely used. At...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/493C04B35/622H01C7/108
CPCC04B35/493C04B35/622C04B2235/3213C04B2235/3255C04B2235/3279C04B2235/3294H01C7/108
Inventor 朱小红王开树张玉梁大云
Owner 江苏省声学产业技术创新中心
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