Title :

Super-Cell Piezoelectric Composite With 1–3 Connectivity

Author(s) :

Rouffaud, R. [Auteur]
GREMAN (matériaux, microélectronique, acoustique et nanotechnologies) [GREMAN - UMR 7347]
Levassort, Franck [Auteur]
GREMAN (matériaux, microélectronique, acoustique et nanotechnologies) [GREMAN - UMR 7347]
Pham Thi, Maï [Auteur]
Bantignies, Claire [Auteur]
Vermon S.A.
Lethiecq, Marc [Auteur]
GREMAN (matériaux, microélectronique, acoustique et nanotechnologies) [GREMAN - UMR 7347]
Hladky, Anne-Christine [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]

Journal title :

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control

Pages :

2215 - 2223

Publisher :

Institute of Electrical and Electronics Engineers

Publication date :

2016-12

ISSN :

0885-3010

English keyword(s) :

transducer
Composite
fabrication method
numerical modeling
piezoelectricity

HAL domain(s) :

Sciences de l'ingénieur [physics]/Acoustique [physics.class-ph]
Physique [physics]/Mécanique [physics]/Mécanique des matériaux [physics.class-ph]

English abstract : [en]

— The standard fabrication method for 1–3 piezo-composites for ultrasound transducers is the " dice and fill " method (DFM) in which lateral periodicity is introduced. This contributes to the appearance of spurious modes ...
Show more >— The standard fabrication method for 1–3 piezo-composites for ultrasound transducers is the " dice and fill " method (DFM) in which lateral periodicity is introduced. This contributes to the appearance of spurious modes that can drastically affect the performance of the device if they appear near its thickness mode frequency, thus limiting the effective frequency range. A new 1–3 piezocomposite fabricated with a super-cell structure [1–3 super cell (13SC)] was designed in order to overcome these limitations. It consists of the merging of several periodic cells with 47% PZT volume fraction and epoxy resin as the matrix. Two lateral periodicities in one direction are defined as well as two different kerfs. The chosen cell shape is composed of five nonaligned square section rods (1 × 1 mm 2). For comparison of performance, two regular 1–3 piezocomposites (the same materials and equivalent periodicities) were fabricated by DFM. Electroacoustic responses in water were measured for the three composites being considered as transducers. Successive regular thinnings (from 2.8 to 1.1 mm) were carried out for each sample to increase the operating frequency (from around 0.4 to 1.3 MHz) and study the evolution of the characteristics (bandwidth and sensitivity). The experimental results confirmed the behavior of those obtained with numerical simulations, showing that the 13SC composite can be used in this entire frequency range, unlike regular composites.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL