Results 241 to 250 of about 150,460 (295)
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Piezoelectric effect in renal calculi
IEEE Transactions on Biomedical Engineering, 1991The piezoelectric effect is investigated for the first time in renal calculi in vitro. The kidney stones are shaped from solid samples as well as from stones crushed into powder and pressed into tablets. Presence of alpha quartz in the renal calculi is investigated by an X-ray technique and the presence of this constituent also helps to explain the ...
V R, Singh, R, Agarwal, V, Singh
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Influence of Multiple Piezoelectric Effects on Piezoelectric Coefficient of Piezoelectric Ceramics
Applied Mechanics and Materials, 2011In 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 +4 more
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Investigation on Multi-Piezoelectric Effects from the First Positive Piezoelectric Effect
Key Engineering Materials, 2014Based on the traditional piezoelectric effect theory, the process of multi-piezoelectric effects generation is analyzed and the theory of the secondary and tertiary piezoelectric effect is deduced by four kinds of piezoelectric equations. Experimental research is performed through the PZT-5 piezoelectric ceramics stack, the existence of multi ...
Li Ping Shi +3 more
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Dual piezoelectric beam robot: The effect of piezoelectric patches’ positions
Journal of Intelligent Material Systems and Structures, 2015Inspired from linear traveling wave ultrasonic motors, a dual piezoelectric beam robot is presented. It consists of an aluminum beam structure, with two non-collocated piezoelectric patches bonded on its surface. The aim of this article is to study the effect of the piezoelectric patches’ positions on the performance of the robot.
Hariri, H., Bernard, Y., Razek, A.
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CEIDP '05. 2005 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, 2005., 2005
In spite of the successful production of a variety of piezoelectric devices, the true origin of the piezoelectric effect is often obscure and the devices not necessarily optimised. Consideration of the underlying electromechanical physics of the phenomenon shows that it is closely associated with double layers of nanometric dimension generated in the ...
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In spite of the successful production of a variety of piezoelectric devices, the true origin of the piezoelectric effect is often obscure and the devices not necessarily optimised. Consideration of the underlying electromechanical physics of the phenomenon shows that it is closely associated with double layers of nanometric dimension generated in the ...
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Ionic Liquids Exhibit the Piezoelectric Effect
The Journal of Physical Chemistry Letters, 2023The piezoelectric effect was discovered over a century ago, and it has found wide application since that time. The direct piezoelectric effect is the production of charge upon application of force to a material, and the converse piezoelectric effect is a change in the material dimension(s) upon the application of a potential.
Md. Iqbal Hossain, G. J. Blanchard
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Piezoelectric effects in electroreflectance
Solid State Communications, 1970Abstract The contribution of piezoelectric strain to electroreflectance is investigated. The symmetry properties of this contribution are deduced for zincblende materials, and contrasted with those of electroreflectance. Separate observations of these contributions is shown to be possible, and good agreement with the phenomenological, tensorial ...
D.S. Kyser, Victor Rehn
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Quantum-confined piezoelectric effect
Journal of Applied Physics, 1989A new type of piezoelectric effect, based on strain-induced changes in confinement of the carriers in the asymmetric quantum well structures is described theoretically. This effect can exist in materials that in a bulk form possess a center of inversion symmetry and therefore do not exhibit conventional piezoelectric properties.
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Piezoelectric Effects in Collagen
Japanese Journal of Applied Physics, 1964The direct and converse piezoelectric effects have been observed in the Achilles tendon of ox and horse, which consists of collagen fibers in which the collagen molecules are highly orientated and crystallized. The matrix of piezoelectric constant is concordant with that derived for and unidirectionally oriented system of crystallites of collagen with ...
Eiichi Fukada, Iwao Yasuda
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Effective charges and piezoelectricity
Physical Review B, 1974The effective charge for piezoelectricity is calculated using the bond-orbital model and Martin's internal-displacement parameters. Direct and simple calculations made with no additional parameters lead to a semiquantitative description of this effect.
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