Energetic characteristics of a ferroelectric as the working body of a shock-wave energy transducer

Novitskii, E. Z.; Sadunov, V. D.

doi:10.1007/bf01463591

Cited by 4 publications

(9 citation statements)

References 2 publications

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“…Shock-induced electrical conductivity is an important parameter for describing the operation of explosive converters of mechanical energy to electric energy based on ferroelectric materials, most often, lead zirconatetitanate piezoceramic systems [7,8]. To attain optimal performance of an explosive converter, it is necessary, in particular, to combine the maximum depolarization of the ferroelectric and the absence of charge leakage through the transductive elements.…”

Section: Discussion Of Resultsmentioning

confidence: 99%

“…2) and PVDF (curve 1 in Fig. 4) recorded in the measuring short-circuit mode corresponds to the phenomenological models of shock depolarization of ferroelectrics [7,8], according to which, with a change in polarization, the current pulse should have a rectangular shape. The onset of the pulse corresponds to the entry of the SW into the sample, and the onset of current fall to the shock arrival at the free surface.…”

Section: Measurement Resultsmentioning

confidence: 99%

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Shock-induced electrical conductivity in some ferroelectrics

Bragunets

Simakov

Borisenok

et al. 2010

Combust Explos Shock Waves

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Section: Discussion Of Resultsmentioning

confidence: 99%

Section: Measurement Resultsmentioning

confidence: 99%

Shock-induced electrical conductivity in some ferroelectrics

Bragunets

Simakov

Borisenok

et al. 2010

Combust Explos Shock Waves

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“…(5). From the formulation of the inverse problem it follows that Ω * = Ø since it is assumed that the observed function V (t) is indeed a solution of Eq.…”

Section: Siec Measurement Methodsmentioning

confidence: 99%

“…The electrical response of shock-loaded piezoelectric or ferroelectric samples are usually described using an equivalent circuit consisting of a current generator loaded with the sample capacitance and a load resistance [4,5]. Considering shock-induced electrical conductivity, the differential equation describing the operation of this circuit is written as…”

Section: Siec Measurement Methodsmentioning

confidence: 99%

“…However, because of the lack of experimental data on SIEC, this quantity was not taken into account quantitatively in phenomenological and computational models for the electrical response of the abovementioned devices to SW action [2,4,5]. There has been an attempt to measure SIEC in piezoceramics using the voltmeter-ammeter method and the oscillating circuit method [6].…”

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confidence: 99%

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Measuring shock-induced electrical conductivity in piezoelectrics and ferroelectrics. Single-crystal quartz

Borisenok

Kruchinin

Bragunets

et al. 2007

Combust Explos Shock Waves

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A method is proposed to measure shock-induced electrical conductivity in electrically active dielectrics -piezoelectrics and ferroelectrics. Results of measurements of electrical conductivity in single-crystal quartz are reported.An analysis of the literature [1] shows that the overwhelming majority of experimental data on the shockinduced electrical conductivity of materials were obtained by electrocontact methods of measuring electrical resistance. All of them are based on the application of an electrical voltage to the material sample studied or on the passage of an electric current from an external source through the sample [1]. These methods, however, are unsuitable for measuring shock-induced electrical conductivity (SIEC) in piezoelectrics and ferroelectrics because shock-wave (SW) action generates an electric field of strength up to 10 7 -10 8 V/m [2] in these materials due to the piezoeffect or shock depolarization, and the effect in question can hardly be identified against the background of the generated fields.SIEC is an important characteristic in the use of piezoelectrics and ferroelectrics as a working medium of dynamic pressure transducers [2] and explosive piezogenerators [3]. However, because of the lack of experimental data on SIEC, this quantity was not taken into account quantitatively in phenomenological and computational models for the electrical response of the abovementioned devices to SW action [2,4,5]. There has been an attempt to measure SIEC in piezoceramics using the voltmeter-ammeter method and the oscillating circuit method [6]. Generally, however, measurements can be performed on unpolarized material samples or the time when depolarization processes in a material have been completed. Therefore, they have a limited range region of application.In the present study, we propose a method for measuring SIEC in piezoelectrics and ferroelectrics which is based on the use of the electric field generated in the material under SW action. A similar approach was employed in [7] to develop a procedure for measuring radiation-induced electrical conductivity in pyroelectrics. SIEC MEASUREMENT METHODLet us derive a differential equation that describes the electrical response of a piezoelectric or ferroelectric sample to SW action taking into account shock-induced electrical conductivity. A schematic representation of the sample is given in Fig. 1.The sample in the shape of a rectangular parallelepiped with dimensions x 0 × y 0 × z 0 is placed in a dielectric medium. Thin metal electrodes are applied on its faces parallel to the plane Y Z. A load resistance R load is switched between the electrodes. A plane SW prorogates at a velocity D along the Z axis.The SW front divides the sample into a compressed and an uncompressed zones. Leakage of the generated electric charge can occur on the face of the sample parallel to the coordinate plane XY (the corresponding surface electrical conductivity is σ 1 ), on the faces par-96 0010-5082/07/4301-0096

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Generation of High-Voltage Pulses by Shock-Loading Ferroelectric Elements

Tret'yakov

2005

Instrum Exp Tech

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Energetic characteristics of a ferroelectric as the working body of a shock-wave energy transducer

Cited by 4 publications

References 2 publications

Shock-induced electrical conductivity in some ferroelectrics

Shock-induced electrical conductivity in some ferroelectrics

Measuring shock-induced electrical conductivity in piezoelectrics and ferroelectrics. Single-crystal quartz

Generation of High-Voltage Pulses by Shock-Loading Ferroelectric Elements

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