Results 141 to 150 of about 82,374 (198)

Architected Piezoelectric Metamaterial With Designable Full Nonzero Piezoelectric Coefficients

Journal of Applied Mechanics, 2023
Abstract Piezoelectric metamaterials have received extensive attention in the fields of robotics, nondestructive testing, energy harvesting, etc. Natural piezoelectric ceramics possess only five nonzero piezoelectric coefficients due to the crystal symmetry of ∞mm, which has limited the development of related devices.
Bo Yu, Yingzhuo Lun, Zewei Hou, Jiawang Hong   +3 more
openaire   +1 more source

Piezoelectric unimorph microcantilevers for measuring direct and converse piezoelectric coefficients

Journal of Applied Physics, 2021
In this study, we propose a new piezoelectric measurement method using unimorph microcantilevers to evaluate precise values of direct and converse piezoelectric coefficients for piezoelectric microelectromechanical system applications. We fabricated unimorph microcantilevers comprising 3-μm-thick polycrystalline Pb(Zr,Ti)O3 (PZT) thin films on a 20-μm ...
Genki Jikyo, Kouta Onishi, Takumi Nishikado, Isaku Kanno, Kensuke Kanda   +4 more
openaire   +1 more source

Influence of Multiple Piezoelectric Effects on Piezoelectric Coefficient of Piezoelectric Ceramics

Applied Mechanics and Materials, 2011
In this paper, theoretical analysis is performed on the influence of multiple piezoelectric effects on piezoelectric coefficients. And a kind of classical piezoelectric ceramics was adopted to conduct the experimental validation. The experimental results of short-circuit boundary condition are obtained by the methods that a capacitor whose capacitance ...
Zhong Hua Zhang, Guang Ming Cheng, Jun Wu Kan, Ping Zeng, Jian Ming Wen   +4 more
openaire   +1 more source

Piezoelectric coefficients and spontaneous polarization of ScAlN

Journal of Physics: Condensed Matter, 2015
We present a computational study of spontaneous polarization and piezoelectricity in Sc(x)Al(1-x)N alloys in the compositional range from x = 0 to x = 0.5, obtained in the context of density functional theory and the Berry-phase theory of electric polarization using large periodic supercells.
Caro, Miguel, Zhang, Siyuan, Riekkinen, Tommi, Ylilammi, Markku, Moram, Michelle, Lopez-Acevedo, Olga, Molarius, Jyrki, Laurila, Tomi   +7 more
openaire   +6 more sources

Identification of nonlinear piezoelectric coefficients

Journal of Applied Physics, 2018
An identification scheme that exploits the vibration response and generated voltage of an energy harvester is proposed to estimate parameters representing nonlinear piezoelectric coefficients. We develop the governing equations of a cantilever beam with tip mass and a piezoelectric layer using the generalized Hamilton's principle and by accounting for ...
Vamsi C. Meesala, Muhammad R. Hajj
openaire   +1 more source

Piezoelectric coefficient measurement of piezoelectric thin films: an overview

Materials Chemistry and Physics, 2002
An overview on the state-of-art piezoelectric measurements of thin films is given. The principles and advantages/disadvantages of the conventional techniques are discussed for piezoelectric applications. Concerning a direct measurement of piezoelectric coefficient and taking into account of 1.0-100.0 mum in film thickness, a displacement of 0.1 nm ...
J.-M. Liu, B. Pan, H.L.W. Chan, S.N. Zhu, Y.Y. Zhu, Z.G. Liu   +5 more
openaire   +1 more source

Characterization of piezoelectric materials with large piezoelectric and electromechanical coupling coefficients

Ultrasonics, 2003
The relaxor based ferroelectric (1-x)Pb(Zn(1/3)Nb(2/3))O(3)-xPbTiO(3) and (1-x)Pb(Mg(1/3)Nb(2/3))O(3)-xPbTiO(3) single crystals provided new challenges in property characterization because their extraordinarily large piezoelectric coefficients and electromechanical coupling coefficients.
Wenhua, Jiang, Rui, Zhang, Bei, Jiang, Wenwu, Cao   +3 more
openaire   +2 more sources

Piezoelectric coefficients measured by picosecond ultrasonics

2009 IEEE International Ultrasonics Symposium, 2009
The needs for materials in thin films characterization are increasing with the raising interest for Micro-Electro-Mechanical-Systems. Picosecond ultrasonics (PU), a non-contact and non-destructive technique, has been largely developed to answer the mechanical metrology requirements of thin films technology, particularly in the field of Bulk Acoustic ...
Emery, P., Devos, Arnaud, Ben Hassine, N., Defay, E.   +3 more
openaire   +2 more sources

3D printed ferroelectret with giant piezoelectric coefficient

Applied Physics Letters, 2022
A ferroelectret cellular structure of poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] is fabricated by a 3D printing technique that exhibits a giant piezoelectric coefficient of 1200 pC/N, which is 40 times higher than its commonly known film counterpart.
Ajay Kumar, Dalip Saini, Dipankar Mandal
openaire   +1 more source

Effectiveness coefficient measures for piezoelectric sensors

Sensors and Actuators A: Physical, 1996
Abstract Two piezoelectric sensor effectiveness coefficients that provide a quantitative measure of effectiveness for piezoelectric materials which are being used for sensing strain (voltage sensor) or strain rate (current sensor) are introduced.
B.R. Patnaik, G.R. Heppler, W.J. Wilson
openaire   +1 more source