Synthesis and electrical properties of lead-free piezoelectric Bi<sub>0.5</sub>Na<sub>0.5</sub>TiO<sub>3</sub> thin films prepared by Sol-Gel method - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of the European Ceramic Society Année : 2018

Synthesis and electrical properties of lead-free piezoelectric Bi0.5Na0.5TiO3 thin films prepared by Sol-Gel method

Résumé

Lead-free Bi0.5Na0.5TiO3 (BNT) piezoelectric thin films were deposited on Pt/TiOx/SiO2/Si substrates by Sol-Gel method. A dense and well crystallized thin film with a perovskite phase was obtained by annealing the film at 700 °C in a rapid thermal processing system. The relative dielectric constant and loss tangent at 12 kHz, of BNT thin film with 350 nm thickness, were 425 and 0.07, respectively. Ferroelectric hysteresis measurements indicated a remnant polarization value of 9 μC/cm2 and a coercive field of 90 kV/cm. Piezoelectric measurements at the macroscopic level were also performed: a piezoelectric coefficient (d33effmax) of 47 pm/V at E = 190 kV/cm was obtained. The piezoresponse force microscopy data confirmed that BNT thin films present ferroelectric and piezoelectric behavior at the nanoscale level.

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Chimie
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Dates et versions

hal-01712599 , version 1 (20-11-2023)

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Sara Abou Dargham, Freddy Ponchel, N. Abboud, M. Soueidan, Anthony Ferri, et al.. Synthesis and electrical properties of lead-free piezoelectric Bi0.5Na0.5TiO3 thin films prepared by Sol-Gel method. Journal of the European Ceramic Society, 2018, 38 (4), pp.1450 - 1455. ⟨10.1016/j.jeurceramsoc.2017.06.019⟩. ⟨hal-01712599⟩
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