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HomeKey Engineering MaterialsKey Engineering Materials Vol. 445Dielectric and Piezoelectric Properties of...

Dielectric and Piezoelectric Properties of (Na,Ba)(Nb,Ti)O₃ Lead-Free Piezoelectric Ceramics

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Abstract:

(Na1-xBax)(Nb1-xTix)O3 (NNBTx; x=0.0-0.21) solid-solution ceramics were synthesized and their crystal structure, dielectric properties and piezoelectric properties were investigated. The crystal structure at room temperature of NNBTx varied from orthorhombic to tetragonal with increasing BaTiO3 content x. The phase boundary between orthorhombic and tetragonal at room temperature was confirmed BT content between x=0.08 and 0.09. For x>0.05, it was found that the Curie temperature was decreased with increasing x. The highest electromechanical coupling factor, kp, and the largest piezoelectric constant, d33, were obtained at x=0.09-0.10.

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Electroceramics in Japan XIII

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Periodical:

Key Engineering Materials (Volume 445)

Pages:

55-58

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.445.55

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Online since:

July 2010

Authors:

Rintaro Aoyagi, Makoto Iwata, Masaki Maeda

Keywords:

Dielectric Property, Lead-Free Piezoelectric Ceramic, NaNbO₃, Phase Transition, Piezoelectric Properties

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© 2010 Trans Tech Publications Ltd. All Rights Reserved

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453 144.

318.

09 162.

450 272.

323.

10 84.

434 360.

199.

07 122.

432 153.

288.

08 159.

454 292.

198.

12 66.

439 890.

202.

06 d33 [pC/N] k33Qmkpx 164.

453 144.

318.

09 162.

450 272.

323.

10 84.

434 360.

199.

07 122.

432 153.

288.

08 159.

454 292.

198.

12 66.

439 890.

202.

06 d33 [pC/N] k33Qmkpx Table I Electromechanical coupling factor, kp and k33, mechanical quality factor, Qm, and piezoelectric constant d33 of NNBT ceramics.