The use of substitution groups to derive thermodynamical relations between the material constants of piezoelectric materials

1966 ◽  
Vol 16 (8) ◽  
pp. 737-751 ◽  
Author(s):  
P. Hájíček
Keyword(s):  
Piezoelectric Materials ◽  
Material Constants

scholarly journals Dynamic Non-Destructive Evaluation of Piezoelectric Materials to Verify on Accuracy of Transversely Isotropic Material Property Measured by Resonance Method

2020 ◽  
Vol 10 (15) ◽  
pp. 5072
Author(s):  
Yu-Hsi Huang ◽  
Chien-Yu Yen ◽  
Tai-Rong Huang
Keyword(s):  
Material Property ◽  
Isotropic Material ◽  
Piezoelectric Materials ◽  
Resonance Method ◽  
Transversely Isotropic ◽  
Piezoelectric Ceramics ◽  
Resonant Frequencies ◽  
Material Constants ◽  
Non Destructive ◽  
Extension Length

In many engineering applications of piezoelectric materials, the design and prediction of the dynamic characteristics depends on the anisotropic electromechanical material property. Through collecting the complete formula in literature and listing all the prepared specimens, transversely isotropic material constants were obtained and verified by dynamic non-destructive evaluation in the paper. The IEEE (Institute of Electrical and Electronics Engineers) resonance method was applied to measure and calculate the orthotropic material constants for piezoelectric ceramics. Five specimens need to be prepared for the measurements using an impedance analyzer, in order to obtain the resonant and anti-resonant frequencies from the modes of thickness extension, length-extension, thickness-shear extension, length-thickness extension, and radial extension. The frequencies were substituted into the formulas guided on the IEEE standard to determine the elastic, dielectric, and piezoelectric constants. The dynamic characteristics of soft and hard piezoelectric ceramics in the results from the finite element method (FEM), which is analyzed from the anisotropic material constants of the resonance method, were verified with the mode shapes and natural frequencies found by experimental measurements. In self-heating, considered as operating on resonant frequencies of piezoelectric material, the resonant frequency and corresponding mode shape calculated by the material constants from resonance method in FEM are more accurate than the material property provided by the manufacturer and literature. When the wide-bandwidth frequency is needed to design the application of piezoelectric ceramics, this study completely provided the measurement method and dynamic verification for the anisotropic electromechanically material property.

scholarly journals Characterization of full set material constants of piezoelectric materials based on ultrasonic method and inverse impedance spectroscopy using only one sample

2013 ◽  
Vol 114 (10) ◽  
pp. 104505 ◽  
Author(s):  
Shiyang Li ◽  
Limei Zheng ◽  
Wenhua Jiang ◽  
Raffi Sahul ◽  
Venkatraman Gopalan ◽  
...  
Keyword(s):  
Impedance Spectroscopy ◽  
Piezoelectric Materials ◽  
Ultrasonic Method ◽  
Material Constants

scholarly journals A Global Optimization Method to Determine the Complex Material Constants of Piezoelectric Bars in the Length Thickness Extensional Mode

Actuators ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 169
Author(s):  
Xiangming Xiong ◽  
Xiaotian Li
Keyword(s):  
Global Optimization ◽  
Piezoelectric Materials ◽  
Optimization Methods ◽  
Optimization Method ◽  
Dielectric Constants ◽  
Impedance Spectra ◽  
Global Optimization Method ◽  
Material Constants ◽  
The Difference ◽  
Optimal Material

Optimization methods have been used to determine the elastic, piezoelectric, and dielectric constants of piezoelectric materials from admittance or impedance measurements. The optimal material constants minimize the difference between the modeled and measured admittance or impedance spectra. In this paper, a global optimization method is proposed to calculate the optimal material constants of piezoelectric bars in the length thickness extensional mode. The algorithm is applied to a soft PZT and a hard PZT and is shown to be robust.

Analysis of Sputtered Zinc Oxide Films

1980 ◽  
Vol 38 ◽  
pp. 416-417
Author(s):  
T. A. Emma ◽  
M. P. Singh
Keyword(s):  
Electron Microscopy ◽  
Zinc Oxide ◽  
Piezoelectric Materials ◽  
Oxide Films ◽  
Optical Quality ◽  
Zno Films ◽  
Rf Power ◽  
X Ray Diffraction ◽  
Sputtered Films ◽  
Zinc Oxide Films

Optical quality zinc oxide films have been characterized using reflection electron diffraction (RED), replication electron microscopy (REM), scanning electron microscopy (SEM), and X-ray diffraction (XRD). Significant microstructural differences were observed between rf sputtered films and planar magnetron rf sputtered films. Piezoelectric materials have been attractive for applications to integrated optics since they provide an active medium for signal processing. Among the desirable physical characteristics of sputtered ZnO films used for this and related applications are a highly preferred crystallographic texture and relatively smooth surfaces. It has been found that these characteristics are very sensitive to the type and condition of the substrate and to the several sputtering parameters: target, rf power, gas composition and substrate temperature.

Energy Harvesting Using Piezoelectric Materials on Microcantilevr Structure

2012 ◽  
Vol 2 (5) ◽  
pp. 252-255
Author(s):  
Rudresha K J Rudresha K J ◽  
◽  
Girisha G K Girisha G K
Keyword(s):  
Energy Harvesting ◽  
Piezoelectric Materials

Anisotropic Elasticity

1996 ◽  
Author(s):  
T. T. C. Ting
Keyword(s):  
Composite Materials ◽  
Elastic Constants ◽  
Piezoelectric Materials ◽  
Anisotropic Materials ◽  
Anisotropic Elasticity ◽  
Stress Singularities ◽  
Comprehensive Survey ◽  
The Subject ◽  
Key Topics ◽  
First Time

Anisotropic Elasticity offers for the first time a comprehensive survey of the analysis of anisotropic materials that can have up to twenty-one elastic constants. Focusing on the mathematically elegant and technically powerful Stroh formalism as a means to understanding the subject, the author tackles a broad range of key topics, including antiplane deformations, Green's functions, stress singularities in composite materials, elliptic inclusions, cracks, thermo-elasticity, and piezoelectric materials, among many others. Well written, theoretically rigorous, and practically oriented, the book will be welcomed by students and researchers alike.

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