Comparison of methods of piezoelectric coefficient measurement

Fialka, Jiří; Beneš, Petr

doi:10.1109/i2mtc.2012.6229293

Cited by 23 publications

(17 citation statements)

References 4 publications

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“…On the other hand, the piezoelectric coefficient d 33 for piezoelectric materials is always characterized by dynamic measurements, with the most common methods being the impedance resonance measurement or the laser interferometry [62]. Several decades ago, dynamic measurement was also used to investigate magnetostrictive Terfenol-D alloys to show their potential as transducers.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Magnetostriction of CoFe2O4 and Its Role in Magnetoelectric Composites

et al. 2018

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Applications of magnetostrictive materials commonly involve the use of the dynamic deformation, i.e., the piezomagnetic effect. Usually, this effect is described by the strain derivative ∂λ=∂H, which is deduced from the quasistatic magnetostrictive curve. However, the strain derivative might not be accurate to describe dynamic deformation in semihard materials as cobalt ferrite (CFO). To highlight this issue, dynamic magnetostriction measurements of cobalt ferrite are performed and compared with the strain derivative. The experiment shows that measured piezomagnetic coefficients are much lower than the strain derivative. To point out the direct application of this effect, low-frequency magnetoelectric (ME) measurements are also conducted on bilayers CFO=PbðZr; TiÞO 3 . The experimental data are compared with calculated magnetoelectric coefficients which include a measured dynamic coefficient and result in very low relative error (<5%), highlighting the relevance of using a piezomagnetic coefficient derived from dynamic magnetostriction instead of a strain derivative coefficient to model ME composites. The magnetoelectric effect is then measured for several amplitudes of the alternating field H ac , and a nonlinear response is revealed. Based on these results, a trilayer CFO/PbðZr; TiÞO 3 /CFO is made exhibiting a high magnetoelectric coefficient of 578 mV=A (approximately 460 mV=cm Oe) in an ac field of 38.2 kA=m (about 48 mT) at low frequency, which is 3 times higher than the measured value at 0.8 kA=m (approximately 1 mT). We discuss the viability of using semihard materials like cobalt ferrite for dynamic magnetostrictive applications such as the magnetoelectric effect.

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Section: Introductionmentioning

confidence: 99%

Dynamic Magnetostriction of CoFe2O4 and Its Role in Magnetoelectric Composites

et al. 2018

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“…Usually, piezoelectric coefficients of ceramic thin films are measured with well‐established methods, such as optical interferometry analysis of the reverse piezoelectric effect or by frequency measurement methods . Consequently, d 33 or d 31 piezoelectric charge coefficients are usually extracted from the measurement, from which g 33 or g 31 voltage coefficients can be further recalculated.…”

Section: Introductionmentioning

confidence: 99%

PVDF piezoelectric voltage coefficient in situ measurements as a function of applied stress

Gusarov

Gusarova

Viala

et al. 2015

J of Applied Polymer Sci

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Direct piezoelectric g 31 voltage coefficient was measured in situ as a function of applied tensile stress for films of polyvinylidene fluoride (PVDF). Measurements were performed under quasi-static conditions with applied strain rates of 0.5-1.5 mm/min for strains up to 12%. Open-circuit voltage was measured with a contact-less electrostatic voltmeter. Obtained results show a strong dependence of the g 31 coefficient of mono-oriented PVDF films on the applied stress, with a maximum value of the coefficient in the transition region between elastic and plastic deformation zones. The effect of sample geometry on the apparent g 31 coefficient is shown and discussed. The anisotropy of the piezoelectric effect is studied by means of g 31 and g 32 measurements. V C 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43248.

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“…The natural frequency is a function of the harvester effective mass m eq and effective stiffness k. We hypothesize that the response of ferroelectric harvesters will continue to follow that of piezoelectric harvesters over the long-term as it has been shown to do over the short-term by Pondrom et al [6,20] and Ray et al [15]. To test this hypothesis, we compare their mathematical model to our experimental results over the test period.…”

Section: Mathematical Modelmentioning

confidence: 93%

“…In order to characterize the electromechanical coupling of the PP film, the piezoelectric charge constant d 33 was measured using a laser interferometry method [20]. It measures the displacement of the ferroelectret film surface x under a known voltage signal V applied to its electrodes.…”

Section: Film Characterizationmentioning

confidence: 99%

Long-Term Stability of Ferroelectret Energy Harvesters

et al. 2019

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Cellular polypropylene (PP) has been recently used in energy harvesting applications. In this work, we investigate its viability and long-term stability under various operating conditions. Specifically, the effect of constant stress and stress cycling on output power and long-term stability of ferroelectret energy harvesters is analyzed. Our findings show that after 112 days constant stress significantly increases the piezoelectric charge constant d 33 and output power from 0.51 μW for a stress-free harvester to 2.71 μW. It also increases the harvester center frequency from 450 to 700 Hz and decreases its optimal resistance from 7 to 5.5 M Ω .

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Comparison of methods of piezoelectric coefficient measurement

Cited by 23 publications

References 4 publications

Dynamic Magnetostriction of CoFe2O4 and Its Role in Magnetoelectric Composites

Dynamic Magnetostriction of CoFe2O4 and Its Role in Magnetoelectric Composites

PVDF piezoelectric voltage coefficient in situ measurements as a function of applied stress

Long-Term Stability of Ferroelectret Energy Harvesters

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