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Piezoelectric behavior in Sr sub(1-x) B a sub(x) B i sub(2) N b sub(2) O sub(9) Aurivillius-type structure ferroelectric ceramics

Physica Status Solidi. B: Basic Solid State Physics, 2013-08, Vol.250 (8), p.1551-1555 [Peer Reviewed Journal]

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Title:
Piezoelectric behavior in Sr sub(1-x) B a sub(x) B i sub(2) N b sub(2) O sub(9) Aurivillius-type structure ferroelectric ceramics
Author: Gonzalez-Abreu, Y ; Pelaiz-Barranco, A ; Guerra, JDS ; Saint-Gregoire, P
Subjects: Arrays
Is Part Of: Physica Status Solidi. B: Basic Solid State Physics, 2013-08, Vol.250 (8), p.1551-1555
Description: The paper presents a piezoelectric study, carried out at room temperature, for the Sr sub(1-x)Ba sub(x)Bi sub(2)Nb sub(2 )O sub(9) (x=0, 15, 30, 50, 70, 85, 100at%) ferroelectric (FE) ceramic system. The structural analysis has shown, for all the compositions, a pure orthorhombic phase with space group A2 sub(1) am. A large electromechanical anisotropy phenomenon has been observed between the electromechanical coupling factors for the thickness and the planar vibrations, which could be very interesting for high-frequency array transducers. The best values of piezoelectric parameters have been obtained for the Sr sub(0.70)Ba sub(0.30)Bi sub(2)Nb sub(2)O sub(9) composition. Our analysis of the X-ray diffraction patterns around the (200) and (020) planes, before and after the polarization process, has suggested a better polarization process for barium concentrations of 15 and 30at%, which provides higher piezoelectric properties.
Language: English
Identifier: ISSN: 0370-1972
EISSN: 1521-3951
DOI: 10.1002/pssb.201248413
Source: Alma/SFX Local Collection

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