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Communication Dans Un Congrès Année : 2017

Complete Electroelastic Set of Co doped Barium Titanate for Transducer Applications

Résumé

BaTiO 3 ceramic doped with cobalt and calcium (BTCaCo), processed by a conventional technique with a reduced sintering temperature, is characterized. Particular attention is paid to the delivery of complete and accurate set of elastic, dielectric, and piezoelectric constants. These databases are relatively rare in the literature but are essential for numerical simulations of new devices, integrating these materials. The processed piezoelectric material exhibits an electromechanical thickness coupling factor (k t) of 45% and a relative dielectric constant of 1180, at constant strain. A 1-3 piezo-composite is successfully fabricated to improve the performance (k t =47%). Finally, BTCaCo disc is used to fabricate a transducer with a center frequency at 4.3 MHz, showing competitive performance compared to a standard PZT-based transducer.

Domaines

Matériaux
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Dates et versions

hal-01705122 , version 1 (09-02-2018)

Identifiants

Citer

Rémy Ul, Rémi Rouffaud, Louis-Pascal Tran-Huu-Hue, Franck Levassort, Maï Pham-Thi, et al.. Complete Electroelastic Set of Co doped Barium Titanate for Transducer Applications. 2017 IEEE International Ultrasonics Symposium (IUS), Sep 2017, Washington, DC, United States. ⟨10.1109/ULTSYM.2017.8091772⟩. ⟨hal-01705122⟩
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