Piezoelectric materials and their applications in radio frequency domain and telecommunications

Benech, Philippe; Duchamp, Jean‐Marc

doi:10.1179/1743676115y.0000000009

Cited by 6 publications

(3 citation statements)

References 28 publications

(29 reference statements)

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“…Piezoelectric, ferroelectric, and relaxor-ferroelectric materials are key components in a range of technologies including sonar, ultrasound, radio frequency (RF) filters, accelerometers, motion sensors, micropositioning systems, and mechanical energy harvesting devices. − These materials display a characteristic coupling of mechanical and electrical properties. In the direct piezoelectric effect, an applied stress σ j induces a polarization P i at a fixed electrical field E , d i , j = false( ∂ P i / ∂ σ j false) E .…”

Section: Introductionmentioning

confidence: 99%

Piezoelectric Response of Plastic Ionic Molecular Crystals: Role of Molecular Rotation

Sødahl

Walker

Berland

2023

Crystal Growth & Design

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Plastic ionic molecular crystals are a novel class of materials that have attracted recent interest due to the discovery of ferroelectric and piezoelectric properties together with an orientationally disordered mesophase with high plasticity. Despite the growing interest, little is known about the mechanisms that underpin their piezoelectric properties. To address this knowledge gap, we use density functional theory calculations with van der Waals density functionals to study the dielectric, piezoelectric, and elastic properties of 11 plastic ionic molecular crystals. The piezoelectric coefficients were found to reach values comparable to inorganic piezoelectrics. Further, some plastic crystals have strikingly large piezoelectric anisotropies. For HQReO4 (quinuclidinium perrhenate) an anisotropy of |d 16/d 33| = 118 was found, 11 times that of LiNbO3, a phase pure inorganic noted for its anisotropy. Our study links the anisotropy to the rotational motion of the constituent molecules in response to shear stress. The large shear piezoelectric coefficients, yet modest dielectric permittivity, results in coupling coefficientsa measure of its suitability for energy harvestingwith values up to 0.79. Our study points to the engineering of the rotational response of plastic ionic crystals as key to realizing the outstanding functional properties of these compounds.

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Section: Introductionmentioning

confidence: 99%

Piezoelectric Response of Plastic Ionic Molecular Crystals: Role of Molecular Rotation

Sødahl

Walker

Berland

2023

Crystal Growth & Design

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“…Piezoelectric, ferroelectric, and relaxor-ferroelectric materials are key components in a range of technologies including sonar, ultrasound, radio frequency (RF) filters, accelerometers, motion sensors, micropositioning systems, and mechanical energy harvesting devices [1][2][3][4][5][6][7][8][9][10][11][12]. Characteristic for these materials is the coupling of mechanical and electrical properties.…”

Section: Introductionmentioning

confidence: 99%

Piezoelectric Response of Plastic Ionic Molecular Crystals: Role of Molecular Rotation

Sødahl

Walker

Berland

2022

Preprint

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Plastic ionic molecular crystals are a novel class of materials that have attracted recent interest due to the discovery of ferroelectric and piezoelectric properties together with an orientationally disordered mesophase with high plasticity. Despite the growing interest, little is known about the mechanisms that underpin their piezoelectric properties. To address this knowledge gap, we study the dielectric, piezoelectric and elastic properties of eleven plastic ionic molecular crystals using van der Waals density functional theory. The piezoelectric coefficients were found to reach values comparable to inorganic piezoelectrics. Further, some plastic crystals have strikingly large piezoelectric anisotropies. For HQReO4 (Quinuclidinium perrhenate) an anisotropy of |d 16 /d 33 | = 119 was found, 11 times that of LiNbO3, a phase pure inorganic noted for its anisotropy. Our study links the anisotropy to rotational motion of the constituent molecules in response to shear stress. The large shear piezoelectric coefficients, yet modest dielectric permittivity results in coupling coefficients – a measure of its suitability for energy harvesting – with values up to 0.79. Our study points to the engineering of the rotational response of plastic ionic crystals as key to realizing the outstanding functional properties of these compounds.

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“…It is therefore clear that piezocomposites provide good answers in terms of applications as in medical transducers, in submarines as hydrophones used to detect acoustic waves and many other applications [7,8,9]. A wide range of possible applications have been investigated in energy harvesting [10,11], tunable filtering for radio frequency telecommunications [12,13], high power transducers [14]. Several models exist in the literature for the prediction of the electromechanical behaviour of piezocomposites.…”

Section: Introductionmentioning

confidence: 99%

Homogenized electromechanical coefficients and effective parameters of 1–3 piezocomposites for ultrasound imaging transducers

et al. 2021

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Analytical models can be useful tools to develop efficient transducers dedicated to a specific application field. This work proposes a homogenization technique for establishing the effective coefficients and parameters of 1-3 piezocomposite whose both phases are piezoelectrically active. Such piezocomposite materials may have homogenized electromechanical properties resulting from positive hybrid effect. A numerical simulation of the effective parameters resulting from a PZT-5A / PVDF-TrFE composition shows that, volume fraction influences significantly on the properties of the piezocomposite and consequently on its behavior in service. As an end-user application for ultrasound imaging, those piezocomposite materials are effectively integrated in a piezocomposite transducer, coupled with a dedicated backing. The resulting characteristics in terms of impulse response and associated electroacoustic echo are compared and discussed for typical configurations. A method for the optimization of the design of such piezocomposite transducer is presented. Specific estimators based on the bandwidth flatness BWF and bandwidth amplitude product BWA are proposed as stable and smooth criteria for an optimization procedure.

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Piezoelectric materials and their applications in radio frequency domain and telecommunications

Cited by 6 publications

References 28 publications

Piezoelectric Response of Plastic Ionic Molecular Crystals: Role of Molecular Rotation

Piezoelectric Response of Plastic Ionic Molecular Crystals: Role of Molecular Rotation

Piezoelectric Response of Plastic Ionic Molecular Crystals: Role of Molecular Rotation

Homogenized electromechanical coefficients and effective parameters of 1–3 piezocomposites for ultrasound imaging transducers

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