Results 251 to 260 of about 23,229 (304)

High-Temperature Piezoelectrics with Large Piezoelectric Coefficients

Journal of Electronic Materials, 2014
High-temperature piezoelectric materials are of interest for sensors and actuators in various industrial applications in which the devices are exposed to high temperature. A lot of research has been conducted in this area to bring forth a suitable piezoelectric material having a high Curie temperature for suitable usage at a high temperature with good ...
K. Shinekumar, Soma Dutta
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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
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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
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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

Comparison of Methods for the Measurement of Piezoelectric Coefficients

IEEE Transactions on Instrumentation and Measurement, 2013
The charge constant of piezoelectric material is one of the crucial constant values. At the present time, the measurement of this value is mostly realized by means of three techniques: the frequency method, the laser interferometer technique, and the quasi-static method.
Jirí Fialka, Petr Benes
openaire   +2 more sources

Stress Dependency of the Thermoelastic and Piezoelectric Coefficients

AIAA Journal, 1997
Abstract An analysis based on fundamental mechanics and thermodynamics is presented for a solid in which the elastic and piezoelectric coefficients are temperature dependent. It is proven that as a consequence of the temperature dependency, the thermal expansion and piezoelectric coefficients must be stress dependent.
Charles W. Bert, Victor Birman
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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
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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
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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
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Comparison of methods of piezoelectric coefficient measurement

2012 IEEE International Instrumentation and Measurement Technology Conference Proceedings, 2012
The paper compares the main methods used for measuring of the piezoelectric material constants. It outlines the principle of three measuring methods most commonly used today, i.e. the frequency method, the laser interferometry method and the quasi-static method. These methods have been practically applied to piezoelectric ceramic samples.
Jiri Fialka, Petr Benes
openaire   +1 more source