Multi constituent niobate lead-free piezoelectric ceramics

A lead-free piezoelectric, multi-component technology, applied in ceramics, piezoelectric/electrostrictive/magnetostrictive devices, circuits, etc., to achieve excellent piezoelectric ferroelectric performance and good process stability

Inactive Publication Date: 2004-07-14
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Multi constituent niobate lead-free piezoelectric ceramics

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Embodiment

[0012] The following are the formulations of several piezoelectric ceramic embodiments and the measured piezoelectric performance parameters:

[0013] One, (Li 0.04 Na 0.4 K 0.56 )NbO 3 (98wt%); add ErMnO 3 (1wt%), YMnO 3 (1wt%) form lead-free piezoelectric ceramics, the performance of the prepared piezoelectric ceramics is:

[0014] d 33 (pC / N)ε 33 / ε 0 k p (%) Poisson's ratio

[0015] 150 360 27.3 0.266

[0016] Two, (Li 0.07 Na 0.6 K 0.33 )Nb 0.7 Sb 0.1 Ta 0.2 o 3 (98%); add YbMnO 3 (2wt%) form lead-free piezoelectric ceramics, the performance of prepared piezoelectric ceramics is:

[0017] d 33 (pC / N)ε 33 / ε 0 k p (%) Poisson's ratio

[0018] 120 450 23.2 0.286

[0019] Three, (Li 0.1 Na 0.55 K 0.35 )Nb 0.9 Sb 0.1 o 3 (96%); add ErMnO 3 (2wt%), DyMnO 3 (2wt%) form lead-free piezoelectric ceramics, the performance of prepared piezoelectric ceramics is:

[0020] d 33 (pC / N)ε 33 / ε 0 k p (%) Poisson's ratio

[0021]135 ...

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Abstract

The present invention belongs to environment concordant piezoelectric ceramic. The lead-free piezoelectric ceramic of the present invention may be expressed in the general expression of (LixNayK1-x-y)(Nb1-zRz)O3+aLMnO3, where, x is 0-0.3, y 0-1, (x+y) is 0-1, z 0-0.4, a is the weight percentage of LMnO3, 0-15 wt%, R is Ta and/or Sb, L is RE element, such as Y, Er, Ho, Dy , Tm, etc. The piezoelectric ceramic has d33 up to 150 pC/N and kp up to 27.0 %, and may be prepared with industrial material and through traditional piezoelectric ceramic process.

Description

1. Technical field [0001] The invention relates to a class of multi-component niobate-based lead-free piezoelectric ceramics, which belongs to the field of environment-harmonic piezoelectric ceramic materials. 2. Background technology [0002] Since the discovery of the piezoelectricity of barium titanate ceramics in the mid-1940s, the research and development of piezoelectric ceramics has been very active. Piezoelectric ceramics and components made of piezoelectric ceramics have been widely used in industries, especially in the information industry. field. Lead zirconate titanate (Pb(Ti, Zr)O 3 ) as the representative lead-based binary system and lead zirconate titanate (Pb(Ti, Zr)O 3 ) as the base material, adding the third component, such as lead magnesium niobate (Pb(Mg 1 / 3 Nb 2 / 3 )O 3 ) represented by lead-based ternary piezoelectric ceramic materials have excellent piezoelectric ferroelectric properties and high Curie temperature. At present, the vast majority of...

Claims

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Application Information

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IPC IPC(8): C04B35/495H01B3/12H01L41/187
Inventor 肖定全赁敦敏朱建国余萍鄢洪建张文
Owner SICHUAN UNIV
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