1-3 Piezocomposites Based on Super-Cell ...
Document type :
Communication dans un congrès avec actes
DOI :
Title :
1-3 Piezocomposites Based on Super-Cell Structuring for Transducer Applications
Author(s) :
Rouffaud, Rémi [Auteur]
GREMAN (matériaux, microélectronique, acoustique et nanotechnologies) [GREMAN]
Levassort, Franck [Auteur]
Université de Tours [UT]
Lethiecq, Marc [Auteur]
GREMAN (matériaux, microélectronique, acoustique et nanotechnologies) [GREMAN]
Pham Thi, Mai [Auteur]
Thales Research and Technology [Palaiseau]
Hladky, Anne-Christine [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Bantignies, Claire [Auteur]
GREMAN (matériaux, microélectronique, acoustique et nanotechnologies) [GREMAN]
Levassort, Franck [Auteur]
Université de Tours [UT]
Lethiecq, Marc [Auteur]
GREMAN (matériaux, microélectronique, acoustique et nanotechnologies) [GREMAN]
Pham Thi, Mai [Auteur]
Thales Research and Technology [Palaiseau]
Hladky, Anne-Christine [Auteur]

Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Bantignies, Claire [Auteur]
Conference title :
2015 IEEE International Ultrasonics Symposium (IUS)
City :
Taipei
Country :
Taïwan
Start date of the conference :
2015-10-21
Journal title :
Ultrasonics Symposium (IUS), 2015 IEEE International
Publisher :
IEEE
English keyword(s) :
Fabrication method
Numerical modeling
Transducer
Composite
Piezoelectricity
Numerical modeling
Transducer
Composite
Piezoelectricity
HAL domain(s) :
Sciences de l'ingénieur [physics]/Matériaux
English abstract : [en]
—In ultrasound transducers, the most popular fabrication method for 1-3 piezocomposites is the « dice and fill » method where lateral periodicity p is introduced and leads to the occurrence of lateral modes. These spurious ...
Show more >—In ultrasound transducers, the most popular fabrication method for 1-3 piezocomposites is the « dice and fill » method where lateral periodicity p is introduced and leads to the occurrence of lateral modes. These spurious modes can drastically damage the performance of the device if they appear near its thickness (h) mode, thus limiting the operational frequency range. In order to overcome the previous limitations while maintaining a good electromechanical efficiency for the 1-3 piezocomposites, a new fabrication method based on lamination is proposed. The piezocomposite is partially regular with a super-cell structure composed of five piezoelectric rods and two different pitches in one direction. The chosen cell shape allows numerical modeling to be performed (ATILA software). This study is made in the frequency range 0.4-1.3 MHz. Experimental results (electroacoustic responses in water) confirm those obtained with the numerical simulations, showing that the super-cell composite can be used in a larger range of frequencies than regular composites, while keeping similar sensitivity and bandwidth.Show less >
Show more >—In ultrasound transducers, the most popular fabrication method for 1-3 piezocomposites is the « dice and fill » method where lateral periodicity p is introduced and leads to the occurrence of lateral modes. These spurious modes can drastically damage the performance of the device if they appear near its thickness (h) mode, thus limiting the operational frequency range. In order to overcome the previous limitations while maintaining a good electromechanical efficiency for the 1-3 piezocomposites, a new fabrication method based on lamination is proposed. The piezocomposite is partially regular with a super-cell structure composed of five piezoelectric rods and two different pitches in one direction. The chosen cell shape allows numerical modeling to be performed (ATILA software). This study is made in the frequency range 0.4-1.3 MHz. Experimental results (electroacoustic responses in water) confirm those obtained with the numerical simulations, showing that the super-cell composite can be used in a larger range of frequencies than regular composites, while keeping similar sensitivity and bandwidth.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
Source :
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