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Bismuth-sodium-potassium-lithium titanate lead-free piezoelectric ceramics

A technology of lead-free piezoelectric and piezoelectric ceramics, applied in piezoelectric/electrostrictive/magnetostrictive devices, circuits, electrical components, etc., can solve problems such as the gap between lead-free piezoelectric ceramics and achieve piezoelectric ferroelectricity The effect of excellent performance, stable process, and excellent piezoelectric ferroelectric performance

Inactive Publication Date: 2004-07-14
SICHUAN UNIV
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  • Claims
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Problems solved by technology

However, the performance of these lead-free piezoelectric ceramics still has some gaps from practical applications.

Method used

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  • Bismuth-sodium-potassium-lithium titanate lead-free piezoelectric ceramics

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Experimental program
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Embodiment

[0011] The following are the recipes and measured piezoelectric performance parameters for several lead-free piezoelectric ceramic examples:

[0012] 1. Using [Bi 0.5 (Na 0.7 K 0.25 Li 0.05 ) 0.5 ] TiO 3 Composition of lead-free piezoelectric ceramics, the performance of the prepared piezoelectric ceramics is:

[0013] d 33 (pC / N)ε 33 / ε 0 k p (%) Poisson's ratio

[0014] 150 1280 22.1 0.285

[0015] Second, using [Bi 0.5 (Na 0.6 K 0.35 Li 0.05 ) 0.5 ] TiO 3 Composition of lead-free piezoelectric ceramics, the performance of the prepared piezoelectric ceramics is:

[0016] d 33 (pC / N)ε 33 / ε 0 k p (%) Poisson this

[0017] 120 1750 26.4 0.174

[0018] Three, using [Bi 0.5 (Na 0.65 K 0.25 Li 0.1 ) 0.5 ] TiO 3 (99.5Wt%); add LiO 2 (0.5Wt%) form lead-free piezoelectric ceramics, the performance of prepared piezoelectric ceramics is:

[0019] d 33 (pC / N)ε 33 / ε 0 k p (%) Poisson's ratio

[0020] 100 1110 17.3 0.295

[0021] Fourth, th...

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Abstract

The present invention belongs to environment concordant piezoelectric ceramic in perovskite structure. The lead-free piezoelectric ceramic of the present invention may be expressed in the general expression of [Bi1-z(Na1-x-yKxLiy)z]TiO3+ aMalphaObeta, where, x is 0-1, y 0-1, (x+y) is 0-1, z 0.3-0.7, MalphaObeta multiple doping oxides in the amount of 0-10 wt% of the main component [Bi1-z(Na1-x-yKxLiy)z]TiO3, M is +1-+6 valance element capable of forming solid oxide, and alpha and beta express the atom number of M and O separately. The piezoelectric ceramic has d33 up to 150 pC / N and kp up to 26.0 %, may be prepared with industrial material and through traditional piezoelectric ceramic process, and has practical application value.

Description

1. Technical field [0001] The invention relates to a new type of lead-free piezoelectric ceramics, which belongs to the field of piezoelectric ceramics with perovskite structure and environment coordination. 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, add the third component [such as lead magnesium niobate (Pb (Mg 1 / 3 Nb 2 / 3 )O 3 ) as the representative] lead-based ternary piezoelectric ceramic materials have excellent piezoelectric ferroelectric properties, high Curie temperature. At present, the vast majority o...

Claims

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Application Information

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IPC IPC(8): C04B35/462C04B35/475H01B3/02H01L41/187
Inventor 肖定全赁敦敏朱建国余萍鄢洪建张文
Owner SICHUAN UNIV
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