Enhanced torsional actuation and stress coupling in Mn-modified 0.93(Na0.5Bi0.5TiO3)-0.07BaTiO3 lead-free piezoceramic system

Berik, Pelin; Maurya, Deepam; Kumar, Prashant; Kang, Min Gyu; Priya, Shashank

doi:10.1080/14686996.2016.1254569

Cited by 7 publications

(4 citation statements)

References 25 publications

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“…The predicted figures of merits indicate that the quinuclidinium and the dabco compounds have the potential for application in shear mode energy harvesting devices. Most energy harvesting devices rely on the longitudinal piezoelectric response, but shear devices have also been studied. − This includes a shear mode energy harvester device utilizing the d 15 piezoelectric response to scavenge energy from pressurized water flow, energy harvesting from the torsional stress of a piezoelectric circular rod, but also shear mode energy harvesting devices more similar to conventional transverse and longitudinal mode harvesters …”

Section: Discussionmentioning

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: Discussionmentioning

confidence: 99%

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

Sødahl

Walker

Berland

2023

Crystal Growth & Design

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“…Later, the transverse shear (d 15 ) coupling constant dependence on the applied electric field (field-dependence) was shown experimentally for a shear-mode piezoceramic actuator within a micro droplet ejecting system [14]. Recently, the nonlinear relation between the statically measured rate of twist and applied voltage was observed experimentally for both in-plane shear (d 36 ) [15] and transverse shear-induced torsion [16] leadfree single crystal actuators. This nonlinearity, attributed to partial depoling and domain wall motion, was taken into account by an updating of the FE model.…”

Section: Actuator Devicesmentioning

confidence: 99%

“…This nonlinearity, attributed to partial depoling and domain wall motion, was taken into account by an updating of the FE model. The simulation approach was not explained, but nonlinear curves of e 36 [15] and e 15 [16] versus applied electric field were embedded (without explanations) in the rate of twist versus applied [17].…”

Section: Actuator Devicesmentioning

confidence: 99%

Field-dependent nonlinear piezoelectricity: a focused review

Benjeddou

2018

International Journal of Smart and Nano Materials

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This contribution presents a multidisciplinary review of the so-called field-dependent nonlinear piezoelectricity. It starts with an introduction that poses the literature analysis framework, through defining this operational (that is often met in practice) piezoelectric field-dependent nonlinearity. Indeed, the latter is a less known phenomenon although it is inherent to stress-free actuation responses of corresponding smart materials, actuators and structures. Then, related experimental observations from piezoelectric materials, actuator devices and smart structures tests are multidisciplinary surveyed for understanding the underlying mechanisms of the encountered field-dependent nonlinearity. Next, empirical material and numerical structural modelling and simulation approaches are critically reviewed from, respectively, the constitutive and finite element analysis points of view. Summary conclusions and few future directions for research are finally provided as a closure. It is worth mentioning that, although it is concise (retains only experiments and experimentally-correlated models and simulations), this critical review covers the last three decades period which is almost the whole age of the piezoelectric materials, actuators and smart structures research field.

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“…Piezoelectric shear d15 transducers which are nested in structures experience less damage and smaller stresses compared to surface mounted extension ones. Piezoelectric d15 shear strain coefficient is higher than the transversal and longitudinal piezoelectric coefficients (d31 and d33), and piezoelectric shear d15 transducers can be used to produce shear and torsional deformation [1][2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%