scholarly journals Properties ofPb(Zr,Ti)O3ultrathin films under stress-free and open-circuit electrical boundary conditions

2004 ◽  
Vol 70 (22) ◽  
Author(s):  
Emad Almahmoud ◽  
Yulia Navtsenya ◽  
Igor Kornev ◽  
Huaxiang Fu ◽  
L. Bellaiche
Keyword(s):  
Boundary Conditions ◽  
Open Circuit ◽  
Electrical Boundary Conditions

Thermal Conductivities of PZT Piezoelectric Ceramics under Different Electrical Boundary Conditions

2020 ◽  
Vol 3 (1) ◽  
pp. 10
Author(s):  
Husain N.  Shekhan ◽  
Erkan A.  Gurdal ◽  
Lalitha Ganapatibhotla ◽  
Janna K.  Maranas ◽  
Ron Staut ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermal Properties ◽  
Boundary Conditions ◽  
Lead Zirconate Titanate ◽  
Electromechanical Coupling ◽  
Short Circuit ◽  
Coupling Factor ◽  
Open Circuit ◽  
Electrical Boundary Conditions ◽  
Poling Direction

<p>Physical properties of polycrystalline lead-zirconate-titanate (PZT) changes according to electrical boundary conditions and poling. This paper reports the thermal properties of poled and unpoled PZT's in the poling direction for open circuit and short circuit conditions. The authors found that the short-circuit condition exhibited the largest thermal conductivity than the open-circuit condition. In the relationship between these two thermal properties, the authors propose the "electrothermal" coupling factor k<sup>κ</sup><sub>33</sub>, which is similar to the electromechanical coupling factor k<sub>33</sub> relating the elastic compliances under short- and open-circuit conditions. On the other hand, the thermal conductivity of the unpoled specimen exhibits the lowest thermal conductivity, in comparison with the poled specimens, which suggests the importance of phonon mode scattering on the thermal conductivity with respect to elastic compliance.</p>

scholarly journals Surface Wave Speed of Functionally Graded Magneto-Electro-Elastic Materials with Initial Stresses

2014 ◽  
Vol 44 (3) ◽  
pp. 49-64 ◽  
Author(s):  
Li Li ◽  
P. J. Wei
Keyword(s):  
Surface Wave ◽  
Boundary Conditions ◽  
Elastic Material ◽  
Short Circuit ◽  
Equations Of Motion ◽  
Open Circuit ◽  
Functionally Graded ◽  
Initial Stresses ◽  
Shear Surface ◽  
Traction Boundary Conditions

Abstract The shear surface wave at the free traction surface of half- infinite functionally graded magneto-electro-elastic material with initial stress is investigated. The material parameters are assumed to vary ex- ponentially along the thickness direction, only. The velocity equations of shear surface wave are derived on the electrically or magnetically open circuit and short circuit boundary conditions, based on the equations of motion of the graded magneto-electro-elastic material with the initial stresses and the free traction boundary conditions. The dispersive curves are obtained numerically and the influences of the initial stresses and the material gradient index on the dispersive curves are discussed. The investigation provides a basis for the development of new functionally graded magneto-electro-elastic surface wave devices.

scholarly journals Non-reciprocal behavior of one-dimensional piezoelectric structures with space-time modulated electrical boundary conditions

2019 ◽  
Vol 126 (14) ◽  
pp. 145108 ◽  
Author(s):  
C. Croënne ◽  
J. O. Vasseur ◽  
O. Bou Matar ◽  
A.-C. Hladky-Hennion ◽  
B. Dubus
Keyword(s):  
Boundary Conditions ◽  
Space Time ◽  
One Dimensional ◽  
Electrical Boundary Conditions ◽  
Piezoelectric Structures

scholarly journals Optimization of a Tunable Piezoelectric Resonator Using Phononic Crystals with Periodic Electrical Boundary Conditions

2015 ◽  
Vol 70 ◽  
pp. 258-261 ◽  
Author(s):  
Marie-Fraise Ponge ◽  
Bertrand Dubus ◽  
Christian Granger ◽  
Jérôme Vasseur ◽  
Mai Pham Thi ◽  
...  
Keyword(s):  
Boundary Conditions ◽  
Phononic Crystals ◽  
Piezoelectric Resonator ◽  
Electrical Boundary Conditions

scholarly journals Models of the interaction between electrons and polar optical phonons in nanostructures

2016 ◽  
Vol 55 (4) ◽  
Author(s):  
Brian K. Ridley
Keyword(s):  
Boundary Conditions ◽  
Linear Combination ◽  
Optical Phonons ◽  
Coupled Mode ◽  
Electrical Boundary Conditions ◽  
Optical Modes ◽  
Simple Models

A brief summary is made of the models used to describe the interaction between electrons and polar optical phonons in nanostructures. Simpler models are compared with the model that describes optical modes that satisfy both mechanical and electrical boundary conditions. Satisfaction of these boundary conditions requires modes to be a linear combination (LC) of longitudinal (LO), transverse (TO) and interface (IF) modes. The role of lattice dispersion turns out to be crucial. If accuracy is not essential, the simple models can provide adequate results, provided that coupled-mode and hot-phonon effects are absent.

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