Two-step simulation of piezoelectric properties of porous PZT according to porosity

Hong, Il-Gok; Shin, Hamin; Kim, Jong-Ho; Paik, Ungyu; Im, Jong-In

doi:10.1080/21870764.2022.2159928

Cited by 5 publications

(1 citation statement)

References 25 publications

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“…Singh et al [29] examined the effect of interfacial imperfections on plane waves in a porous piezoelectric medium. Several researchers investigated the characterization of dielectric, elastic, and piezoelectric constants of porous piezoelectric ceramics using experimental and simulation techniques [30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Reflection and transmission of ultrasonic waves in a layered structure with a functionally graded porous piezoelectric base

Vashishth,

Bareja,

Gupta

2024

Phys. Scr.

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The phenomenon of reflection and transmission of waves offers valuable insights into the internal composition and structural characteristics of materials. This study investigates the reflection and transmission of waves in functionally graded porous piezoelectric materials. These materials, distinguished by their customised electromechanical attributes and gradual property variations, present a promising avenue for optimizing performance across diverse applications, including ultrasonics. The reflection and transmission of ultrasonic waves in a novel structure, consisting of a fluid half-space (FHS) positioned above n porous piezoelectric layers, situated on top of a functionally graded porous piezoelectric half-space (FGPPHS) is studied in this paper. The material properties of FGPPHS are considered to vary along the vertical direction and and resulting equations are solved analytically and numerically. The transfer matrix method is employed to analytically determine the energy ratios and amplitude ratios for reflected and transmitted waves. Numerical computations are performed to study the impacts of frequency, gradation, angle of incidence, and porosity on the energy ratios. Furthermore, the influence of stacking of the number of porous piezoelectric layers above FGPPHS, and the choice of materials (Barium Titanate (BaTiO 3), PZT − 5H, PZT − 7H) in layers and half-space, on the energy ratios are studied. The absolute value of acoustic impedance is plotted for various angles of incidence and porosities. From the graph, it is found that the acoustic impedance can be controlled by adjusting porosity in the structure. This will be helpful in minimizing the energy loss at ceramic-medium interface and improving the mismatch of acoustic impedances at the interfaces of medical ultrasonic imaging devices or underwater sonar detectors, and NDE applications. Further, because of lower acoustic impedance, lower density and stiffness of porous piezoelectric materials, the outcomes of this study will be helpful in designing SAW devices.

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Section: Introductionmentioning

confidence: 99%

Reflection and transmission of ultrasonic waves in a layered structure with a functionally graded porous piezoelectric base

Vashishth,

Bareja,

Gupta

2024

Phys. Scr.

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Porous Structure Enhances the Longitudinal Piezoelectric Coefficient and Electromechanical Coupling Coefficient of Lead‐Free (Ba_0.85Ca_0.15)(Zr_0.1Ti_0.9)O₃

Li,

Roscow,

Khanbareh

et al. 2024

Advanced Science

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The introduction of porosity into ferroelectric ceramics can decrease the effective permittivity, thereby enhancing the open circuit voltage and electrical energy generated by the direct piezoelectric effect. However, the decrease in the longitudinal piezoelectric coefficient (d33) with increasing porosity levels currently limiting the range of pore fractions that can be employed. By introducing aligned lamellar pores into (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3, this paper demonstrates an unusual 22–41% enhancement in the d33 compared to its dense counterpart. This unique combination of high d33 and a low permittivity leads to a significantly improved voltage coefficient (g33), energy harvesting figure of merit (FoM33) and electromechanical coupling coefficient (). The underlying mechanism for the improved properties is demonstrated to be a synergy between the low defect concentration and high internal polarizing field within the porous lamellar structure. This work provides insights into the design of porous ferroelectrics for applications related to sensors, energy harvesters, and actuators.

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Modeling of hysteretic response of porous piezo/ferroelectric ceramics

Stirbu,

Mitoseriu

2024

Computational Materials Science

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Two-step simulation of piezoelectric properties of porous PZT according to porosity

Cited by 5 publications

References 25 publications

Reflection and transmission of ultrasonic waves in a layered structure with a functionally graded porous piezoelectric base

Reflection and transmission of ultrasonic waves in a layered structure with a functionally graded porous piezoelectric base

Porous Structure Enhances the Longitudinal Piezoelectric Coefficient and Electromechanical Coupling Coefficient of Lead‐Free (Ba_0.85Ca_0.15)(Zr_0.1Ti_0.9)O₃

Modeling of hysteretic response of porous piezo/ferroelectric ceramics

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Two-step simulation of piezoelectric properties of porous PZT according to porosity

Cited by 5 publications

References 25 publications

Reflection and transmission of ultrasonic waves in a layered structure with a functionally graded porous piezoelectric base

Reflection and transmission of ultrasonic waves in a layered structure with a functionally graded porous piezoelectric base

Porous Structure Enhances the Longitudinal Piezoelectric Coefficient and Electromechanical Coupling Coefficient of Lead‐Free (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3

Modeling of hysteretic response of porous piezo/ferroelectric ceramics

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Porous Structure Enhances the Longitudinal Piezoelectric Coefficient and Electromechanical Coupling Coefficient of Lead‐Free (Ba_0.85Ca_0.15)(Zr_0.1Ti_0.9)O₃