Publication

Piezoelectric and dielectric aging in Pb(Zr,Ti)O-3 thin films and bulk ceramics

Nava Setter, Alexander Tagantsev
1997
Journal Articles

Abstract

Piezoelectric and dielectric aging was studied in Pb(Zr,Ti)O-3 (PZT) thin films and bulk ceramics. It was found that piezoelectric aging in thin films obeys the logarithmic time dependence with the relative aging rate much higher than that of the dielectric constant, while comparable aging rates of piezoelectric and dielectric constants were found in PZT ceramics. The origin of piezoelectric aging in PZT films was related to depolarization of the films rather than to suppression of the domain wall motion as was generally accepted for PZT ceramics.

Official source

https://infoscience.epfl.ch/entities/publication/fcb53cfb-c646-49c2-91e8-a90d0cc5b6df

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Nava Setter, Alexander Tagantsev
1997
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/fcb53cfb-c646-49c2-91e8-a90d0cc5b6df

About this result

Related concepts (32)

Piezoelectricity

Piezoelectricity (ˌpiːzoʊ-,_ˌpiːtsoʊ-,_paɪˌiːzoʊ-, piˌeɪzoʊ-,_piˌeɪtsoʊ-) is the electric charge that accumulates in certain solid materials—such as crystals, certain ceramics, and biological matter such as bone, DNA, and various proteins—in response to applied mechanical stress. The word piezoelectricity means electricity resulting from pressure and latent heat. It is derived (an ancient source of electric current). The piezoelectric effect results from the linear electromechanical interaction between the mechanical and electrical states in crystalline materials with no inversion symmetry.

Lead zirconate titanate

Lead zirconate titanate, also called lead zirconium titanate and commonly abbreviated as PZT, is an inorganic compound with the chemical formula It is a ceramic perovskite material that shows a marked piezoelectric effect, meaning that the compound changes shape when an electric field is applied. It is used in a number of practical applications such as ultrasonic transducers and piezoelectric resonators. It is a white to off-white solid. Lead zirconium titanate was first developed around 1952 at the Tokyo Institute of Technology.

Dielectric

In electromagnetism, a dielectric (or dielectric medium) is an electrical insulator that can be polarised by an applied electric field. When a dielectric material is placed in an electric field, electric charges do not flow through the material as they do in an electrical conductor, because they have no loosely bound, or free, electrons that may drift through the material, but instead they shift, only slightly, from their average equilibrium positions, causing dielectric polarisation.

Related publications (2)

Piezoelectric and dielectric aging in Pb(Zr,Ti)O-3 thin films and bulk ceramics

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First-principles study of structural, electronic, dynamical, and dielectric properties of zircon

Tunneling conduction in virgin and fatigued states of PZT films