A new method for studying piezoelectric materials

Alquié, C.; Lewiner, J.

doi:10.1051/rphysap:01985002006039500

Cited by 25 publications

(4 citation statements)

References 12 publications

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“…The laser-induced pressure pulse (LIPP) method [16]- [18] for studying polarization distribution is well established. The experimental setup was described previously [18].…”

Section: Polarization In 0-3 Compositesmentioning

confidence: 99%

“…Due to ablation and localized heating, a pressure pulse that propagates along the z axis (sample thickness direction) at the velocity of sound v is generated. For short pressure pulses, the voltage (into a 50 Ω load) measured during the penetration of the pulse into the sample or its exit is proportional to the piezoelectric coefficient e 33 (defined as stress/electric field at constant strain or charge density/strain at constant electric field) near the sample surface [16].…”

Section: Polarization In 0-3 Compositesmentioning

confidence: 99%

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Piezoelectric and pyroelectric properties of PZT/P(VDF-TrFE) composites with constituent phases poled in parallel or antiparallel directions

Chan

Choy

2000

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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Composites of lead zirconate titanate (PZT) powder dispersed in a vinylidene fluoride-trifluoroethylene copolymer [P(VDF-TrFE)] matrix have been prepared by compression molding. Three groups of polarized samples have been prepared by poling: only the ceramic phase, the ceramic and polymer phases in parallel directions, and the two phases in antiparallel directions. The measured permittivities of the unpoled composites are consistent with the predictions of the Bruggeman model. The changes in the pyroelectric and piezoelectric coefficients of the poled composites with increasing ceramic volume fraction can be described by modified linear mixture rules. When the ceramic and copolymer phases are poled in the same direction, their pyroelectric activities reinforce while their piezoelectric activities partially cancel. However, when the ceramic and copolymer phases are poled in opposite directions, their piezoelectric activities reinforce while their pyroelectric activities partially cancel.

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“…The laser-induced pressure pulse (LIPP) method [16]- [18] for studying polarization distribution is well established. The experimental setup was described previously [18].…”

Section: Polarization In 0-3 Compositesmentioning

confidence: 99%

Section: Polarization In 0-3 Compositesmentioning

confidence: 99%

Piezoelectric and pyroelectric properties of PZT/P(VDF-TrFE) composites with constituent phases poled in parallel or antiparallel directions

Chan

Choy

2000

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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“…In shortcircuit conditions, the variation of the image charge results in a current I(t) where the time t is related to the position of the wave front by tϭz/v. For short pressure pulses, the current measured during the penetration of the pulse into the sample or its exit is directly proportional to the piezoelectric coefficient e zz (z) at the interface 19 I͑t ͒ϭϪa⌬p͑v/d 0 ͒e zz ͑z͒, ͑2͒…”

Section: A Experimentsmentioning

confidence: 99%

“…The most widely used thermal methods include the thermal pulse method, 13,14 the laser intensity modulation method ͑LIMM͒, 15,16 and the thermal step method. 17 The acoustic methods include the pressure wave propagation ͑PWP͒ method 18,19 ͓also known as the laser induced pressure pulse ͑LIPP͒ method 20 ͔, the piezoelectrically generated pressure step method 21 and the pulsed electroacoustic method. 22 It has been shown previously that non-uniform poling of thin P͑VDF-TrFE͒ film can occur, with the polarization starting at the anode, and the mechanism has been discussed in detail.…”

Section: Introductionmentioning

confidence: 99%

Polarization of thick polyvinylidene fluoride/trifluoroethylene copolymer films

Chan

Zhao

Kwok

et al. 1996

Journal of Applied Physics

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Thick ͑800 m͒ polyvinylidene fluoride/trifluoroethylene ͑P͑VDF-TrFE͒͒ copolymer films for transducer applications are poled under applied voltage at elevated temperatures. By using different heat treatments, poling temperatures, and poling time, we are able to prepare a uniformly poled film with a single resonance peak at 1.3 MHz, or a nonuniformly poled film with two resonances ͑1.3 and 2.6 MHz͒, or a film with bimorph structure with a single resonance at 2.6 MHz. The nonuniform polarization which arises from charge injection from the cathode is checked by the pressure wave propagation method. The polarization mechanisms in these thick films are expected to be similar to those previously reported for thin films. The results obtained in this work may lead to practical applications because they suggest a means for controlling transducer frequency by poling.

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Zur Bildung und Stabilisierung von Raumladungen in Polyethylen bei impulsförmiger Elektronenbestrahlung

Bos¹,

Decker²,

Remer³

et al. 1987

Acta Polymerica

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Akademie der Wissenschaften der DDR, Zentralinstitut fur Isotopen-und Strahlenforschung, DDR-7050 Leipzig Bildung, Stabilisierung, Migration und Abbau von elektrischen Ladungen in bestrahltem Polyethylen werden mittels laserakustischer Sondierung untersucht und auf der Basis theoretischer Modellvorstellungen durch Computersimulation bestimmt. Gemessene und berechnete Feld-und Ladungsverteilungen werden gegenubergestellt. Die effektive Beweglichkeit der negativen Ladung strager wird abgeschatzt und mit der Gleichstrombeweglichkeit verglichen. 0 zenepayuu u cmabmuaa yuu npocmpancmeennwx aapsdoe e noAuamuJcene npu ezo u.wyAbcnofi 06nywnuu s m~m p ona.w MeT0,qOM n a 3 e p~o -a~y c~a~e c~o r o ~O H A I I~O B~H M H 113yqe~b1 npoqeccM reHepaqm, C T~~M J I H~~~M M , mrpaqmi M 3BM H a ocHoBe TeopeTmecKux Mo,qenbHHx npeAcTasneHIIi. CpaBHem ~s~e p e~~~e II pacqeTHHe AaHHne o pac-npeReneHm IIOJIH II aap~,qa. OqeHeHa ~@ @~K T H B H~H no,qBHxwocTb Hocmenei oTpHqaTenbHoro a a p~~a M cpameHa Formation and stabilization of space charges in electron pulse irradiated polyethylene Formation, stabilization, migration and decay of the electric charge in irradiated polyethylene are investigated by means of the laser-induced pressure pulse method and determined by computer simulation using theoretical models. The measured and calculated field and charge distributions are compared. The value of the effective mobility of the negative charges is estimated in relation t o the drift mobility. YTeqKH 3JIeKTpMYeCKHX 3apRAOB B 06JIpeHHOM IIOJIH3TIIJIeHe. 3 T M IIpOueCCbI OIIpeAeJIeHbI IIyTeM CIIMYJIRqHH Ha C IIOABHXHOCTbH) B IIOJIe IlOCTOHHHOrO TOKB. 1. Zur Strahlenbelastung von Polymeren Organische Hochpolymere, darunter das PE, werden in steigendem MaBe der Einwirkung energiereicher Strahlung ausgesetzt: bei der strahlenchemischen Polymermodifizierung, in der Kernenergetik, der Bestrahlungstechnik sowie der Kosmosforschung als Konstruktionsmaterialien, Werk-und Isolierstoffe. Beurteilung und Prognostizierung ihres Kurz-untl Langzeitverhaltens bezuglich chemischer und physikalischer Strahlungseffekte sowie deren Folgen gewinnen deshalb zunehmend an Interesse. Die Strahlenbelastungen, denen Polymere unterworfen werden, lassen sich qualitativ und quantitativ durch Strahlenart und -energie E, lineare Energieubertragung LET untl Reichweite RW, integrale Dosis D und Dosisleistung D charakterisieren. LET und RW bedingen die mikroskopische (Tracks, Spurs) uncl makroskopische (Tiefendosis) Verteilung der absorbierten Primarenergie, D die pro Masseneinheit eingestrahlte Energie und damit auch die Dichte und uberlagerung von Teilchenbahnen, D die Geschwindigkeit der Applikation der Strahlungsenergie untl somit die Wirksamkeit von Relaxationsprozessen (Ladungsrekombination und -abfluB, Aufheizung des Probevolumens insgesamt oder in Mikroregionen u. a.). Ungeachtet der Verschiedenartigkeit der einfallenden Primarstrahlung (Elektronen, Gamma-und Rontgenquanten, Neutronen, Protonen und schwerere geladene Teilchen) wird der Hauptteil der Strahlenwirkung durc...

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A new method for studying piezoelectric materials

Cited by 25 publications

References 12 publications

Piezoelectric and pyroelectric properties of PZT/P(VDF-TrFE) composites with constituent phases poled in parallel or antiparallel directions

Piezoelectric and pyroelectric properties of PZT/P(VDF-TrFE) composites with constituent phases poled in parallel or antiparallel directions

Polarization of thick polyvinylidene fluoride/trifluoroethylene copolymer films

Zur Bildung und Stabilisierung von Raumladungen in Polyethylen bei impulsförmiger Elektronenbestrahlung

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