Elastic, dielectric, and piezoelectric losses in piezoceramics: how it works all together

Mezheritsky, A.V.

doi:10.1109/tuffc.2004.1304268

Cited by 37 publications

(39 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The description of the material parameters by complex values 2 (P* =P´-iP´´) is a convenient way to separately account for the dielectric, piezoelectric and mechanical losses (tanδ= P´´/ P´). The origin of the losses in ferroelectric ceramics has been analyzed in numerous works 3,4 . Several authors have developed methods for the complex characterization of piezoceramics from complex impedance measurements at resonance, whose validity has been discussed elsewhere 5 .…”

Section: Introductionmentioning

confidence: 99%

Resonance modes in the standard piezoceramic shear geometry: A discussion based on finite element analysis

Pardo

Algueró

Brebøl³

2005

J. Phys. IV France

View full text Add to dashboard Cite

Abstract. Several authors developed methods for the complex characterization of piezoceramics from complex impedance measurements at resonance. Alemany et al. developed an automatic iterative method, applied and reported in a first publication to four modes of resonance: (1) the length extensional mode of a thickness poled rectangular bar; (2) the length extensional mode of long rods or rectangular bars, length poled; (3) the thickness extensional mode of a thin plate and (4) the thickness shear mode of a thin plate. In a second publication it was reported the application of the method to (5) the radial mode of a thin disk, thickness poled, the most mathematically complex geometry. The (2), (3), (4) and (5) modes of resonance are sufficient for the purpose of the determination of the full set of complex elastic, dielectric and piezoelectric coefficients of piezoceramics, a 6mm symmetry material. This work presents the results of the FEA modeling of a thin plate based on the characterization of a commercial ceramic. The comparison of the experimental resonance spectra and the FEA results obtained for elastically, dielectrically and piezoelectrically homogeneous samples is presented and discussed. The complex characterization for the first time of the shear mode of a new lead-free piezoceramic is also shown.

show abstract

Section: Introductionmentioning

confidence: 99%

Resonance modes in the standard piezoceramic shear geometry: A discussion based on finite element analysis

Pardo

Algueró

Brebøl³

2005

J. Phys. IV France

View full text Add to dashboard Cite

show abstract

“…Other than air damping, the dielectric loss and piezoelectric loss in the PZT thin film during electromechanical coupling are also important issues for resonators (Mezheritsky 2004). According to DeVoe's study (DeVoe 2001), the transfer function of a resonator transduced by piezoelectric thin film can be expressed as follows:…”

Section: Methodsmentioning

confidence: 99%

Quality factor of micro cantilevers transduced by piezoelectric lead zirconate titanate film

Ikehara

Kobayashi

et al. 2006

Microsyst Technol

View full text Add to dashboard Cite

The quality factors (Q-factor) of micro cantilevers transduced by piezoelectric lead zirconate titanate (PZT) film under atmospheric pressure conditions were investigated and discussed. It was found that Q-factors increased with thicker PZT film. Due to air damping, shorter cantilevers resulted in preferred larger Q-factors. The Q-factor was found to be as high as 450 for a 150-lm long PZT cantilever when using 1.04-lm thick PZT film as the electromechanical conversion medium. Differences in the measured Q-factors when using integrated PZT film self-excitation and external PZT vibrator actuation indicate that energy dissipation induced by the electromechanical coupling in PZT thin films was noteworthy even under atmospheric pressure conditions. Moreover, the mechanical properties of the PZT film were found contribute significantly to decreases of the Q-factor.

show abstract

“…A piezeletricidade é um fenômeno não-linear (AURELLE et al, 1996); (SIMKOVICS et al, 1999), no entanto, é comum o uso de uma aproximação linear em seu estudo. Os materiais piezelétricos mais usados atualmente em sistemas ultra-sônicos de potência são as cerâmicas da família PZT, titanato zirconato de chumbo, (GALLEGO-JUAREZ, 1989), devido a sua alta eficiência de conversão eletromecânica (CAMPOLO et al, 2003); (HUANG et al, 2004); (MEZHERITSKY, 2004), e alta temperatura de Curie, que é a temperatura acima da qual as características piezelétricas são perdidas, fenômeno chamado de despolarização. Essas cerâmicas possuem uma resistência muito maior à compressão do que à tração mecânica, dessa forma, a montagem em sanduíche do transdutor também tem como objetivo evitar a ruptura das cerâmicas durante o semi-ciclo de tração (MAROPIS, 1969);ZHAO, 1999);MÜHLEN, 2001aMÜHLEN, , 2001bMÜHLEN, e 2003.…”

Section: Lista De Abreviaturas E Siglasunclassified

Análise numérica de um transdutor piezelétrico de potência para processamento de termoplásticos têxteis.

Silva¹

View full text Add to dashboard Cite

Elastic, dielectric, and piezoelectric losses in piezoceramics: how it works all together

Cited by 37 publications

References 14 publications

Resonance modes in the standard piezoceramic shear geometry: A discussion based on finite element analysis

Resonance modes in the standard piezoceramic shear geometry: A discussion based on finite element analysis

Quality factor of micro cantilevers transduced by piezoelectric lead zirconate titanate film

Análise numérica de um transdutor piezelétrico de potência para processamento de termoplásticos têxteis.

Contact Info

Product

Resources

About