RT info:eu-repo/semantics/article
T1 Thermoelectrical characterization of piezoelectric diaphragms: Towards a better understanding of ferroelectrics for future memory applications
A1 Vinuesa Sanz, Guillermo
A1 Marín, Pelayo
A1 González Ossorio, Óscar
A1 Sahelices Fernández, Benjamín
A1 García García, Héctor
A1 Castán Lanaspa, María Helena
A1 Dueñas Carazo, Salvador
K1 Diafragmas piezoeléctricos
K1 Titanato de circonato de plomo
K1 22 Física
K1 33 Ciencias Tecnológicas
AB This work deals with the thermoelectric characterization of commercial lead zirconate titanate (PZT) based piezoelectric diaphragms. An in-depth analysis of the piezo- and ferroelectric behavior of the samples was carried out by measuring current voltage curves and polarization hysteresis cycles in a wide temperature range. We demonstrate that, as the temperature decreases, higher electric fields are needed to completely polarize the sample. Furthermore, I-V measurements, polarization hysteresis loops and coercive fields allow us to confirm that the samples present different grain sizes. From impedance measurements, resonance frequency values, capacitance and permittivity were determined at temperatures ranging from 100 to 320 K. It is shown that impedance maxima shift towards greater frequency values when decreasing the temperature, which is mainly attributed to the appearance of an internal stress that generates larger stiffness in the ceramic. Finally, an electroacoustic characterization was made by measuring the sound pressure of the diaphragms in the human hearing frequency range
PB Electrochemical Society
SN 1938-5862
YR 2021
FD 2021
LK https://uvadoc.uva.es/handle/10324/48632
UL https://uvadoc.uva.es/handle/10324/48632
LA eng
NO ECS Transactions, 2021, vol. 102, n. 2, p. 45-59
NO Producción Científica
DS UVaDOC
RD 22-nov-2024