Sodium niobate lithium tantalate series lead-free piezoelectric ceramic composite

A ceramic composition and lead-free piezoelectric technology are applied in the field of sodium niobate lithium tantalate-based lead-free piezoelectric ceramic compositions, which can solve the problems of less research and achieve stable preparation process, large mechanical quality factor, and dielectric properties. Low loss effect

Inactive Publication Date: 2012-07-11
SICHUAN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, compared to the above four types of lead-free piezoelectric ceramics, regarding

Method used

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  • Sodium niobate lithium tantalate series lead-free piezoelectric ceramic composite
  • Sodium niobate lithium tantalate series lead-free piezoelectric ceramic composite

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Example 1:

[0020] Formula: 0.98NaNbO 3 -0.02LiTaO 3

[0021] performance:

[0022] d 33 (pC / N) ε r k p (%) Q m tanδ(%)

[0023] 41 147 16.9 544 1.26

Example Embodiment

[0024] Example 2:

[0025] Formula: 0.92NaNbO 3 -0.08LiTaO 3

[0026] performance:

[0027] d 33 (pC / N) ε r k p (%) Q m tanδ(%)

[0028] 42 129 17.5 1036 2.16

Example Embodiment

[0029] Example 3:

[0030] Formula: 0.88NaNbO 3 -0.12LiTaO 3

[0031] performance:

[0032] d 33 (pC / N) ε r k p (%) Q m tanδ(%)

[0033] 46 137 18.3 1333 1.22

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Abstract

A novel sodium niobate lithium tantalate series lead-free piezoelectric ceramic composite comprises perovskite anti-ferroelectrics NaNbO3 and lithium niobate ferroelectrics LiTao3 and is represented as formula (1-x)NaNbO3-xLiTaO3, wherein 0.025<=x<=0.25. The lead-free piezoelectric ceramic composite further comprises one kind or a plurality of kinds of oxides, formula of the lead-free piezoelectric ceramic composite is (1-x)NaNbO3-xLiTaO3 ((110-a)mol%)+M alpha O beta (amol%), the M alpha O beta is one kind or a plurality of kinds of oxides, molar ratio of a content to main component (1-x)NaNbO3-xLiTaO3 is 0-3%, M is an element which is from +1 to +6 and capable of forming a solid-state oxide with oxygen, and the alpha and the beta respectively show atomic numbers of corresponding element M and the oxygen in the oxide. The optimal value d33 of the piezoelectric ceramic composite can reach above 70pC/N, kp can reach above 20%, and Qm can reach above 1200. The composite is good in compactness, high in Curie temperature, good in heat stability and stable in process, is obtained by adopting the tradition piezoelectric ceramic manufacturing technology, and has practicability.

Description

technical field [0001] The invention belongs to the field of perovskite structure piezoelectric ceramics, and relates to a novel multi-element niobate tantalate lead-free piezoelectric ceramic composition, in particular to a sodium niobate lithium tantalate lead-free piezoelectric ceramic composition . Background technique [0002] Since the mid-1940s, the piezoelectricity of barium titanate ceramics was discovered, especially lead zirconate titanate Pb(Ti,Zr)O with excellent piezoelectric properties and high Curie temperature. 3 After the successful development of ceramics, the structural feature is ABO 3 The research and development of lead-based perovskite piezoelectric ceramics is very active. Piezoelectric ceramics and piezoelectric ceramic devices have been widely used in industry, especially in the field of information industry. 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...

Claims

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Application Information

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IPC IPC(8): C04B35/495
Inventor 赁敦敏郑荞佶孙海玲万洋
Owner SICHUAN NORMAL UNIVERSITY
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