Electromechanical Displacement of Soft/Hard PZT Bi-Layer Composite Actuator

2015 ◽  
Vol 659 ◽  
pp. 96-101
Author(s):  
Piyalak Ngernchuklin ◽  
Arjin Boonruang ◽  
Chalearmchai Jeerapan ◽  
Pracha Laoauyporn ◽  
Sittichai Kanchanasutha ◽  
...  
Keyword(s):  
Large Strain ◽  
Ferroelectric Properties ◽  
Single Layer ◽  
Mechanical Quality Factor ◽  
Electromechanical Properties ◽  
Layer Composite ◽  
Mechanical Quality ◽  
Piezoelectric Strain ◽  
The Difference ◽  
Thermal Expansion Coefficient Mismatch

PZTs can be classified into two types, i.e., soft and hard PZTs, which are categorized by the piezoelectric and ferroelectric properties such as coercive field, piezoelectric strain, mechanical quality factor etc. It is known that the combination effect of the soft/hard PZT composites can generate large strain/actuation compared to monolithic PZT ceramics. In this study, soft and hard PZT powders were co-pressed into bi-layer disks with various ratios between soft and hard PZT powders, ranging from 0:100~100:0 vol. % (with 10 % increments) and then they were co-sintered. Due to the difference in the planar shrinkage of the two layers and thermal expansion coefficient mismatch, dome-shaped bi-layer composites with various dome heights were obtained. It was shown that the constrained layer either soft PZT or hard PZT affected various properties including the dome geometry, the strain-E-field response, and the displacement hysteresis loop. The electromechanical properties and actuation performance of such bi-layer composite actuators have been investigated and compared to the soft and hard PZT single layer counterparts.

Influence of Base Thickness on Performance of 1-3-2 Piezoelectric Composite

2010 ◽  
Vol 123-125 ◽  
pp. 121-124 ◽  
Author(s):  
Xin Cheng ◽  
Shuang Shuang Liao ◽  
Shi Feng Huang ◽  
Li Li Guo
Keyword(s):  
Coupling Coefficient ◽  
Acoustic Impedance ◽  
Electromechanical Coupling ◽  
Mechanical Quality Factor ◽  
Piezoelectric Composite ◽  
Electromechanical Coupling Coefficient ◽  
Electromechanical Properties ◽  
Base Thickness ◽  
Mechanical Quality ◽  
Titanate Ceramic

Sulphoaluminate cement and Lead Niobium-Magnesium Zirconate Titanate ceramic [P(MN)]ZT were used as matrix and functional phase respectively to fabricate 1-3-2 cement-based piezoelectric composites by dice and filling technique. The influences of base thickness on piezoelectric properties, electromechanical properties and acoustic impedance properties of the composites were discussed. The results show that as the base thickness increases, the piezoelectric stain factor d33 increases gradually, while the piezoelectric voltage factor g33 decreases. The planar electromechanical coupling coefficient Kp exhibits the trend of decrease, while the thickness electromechanical coupling coefficient Kt and acoustic impedance show the increasing trend. The mechanical quality factor Qm reaches the minimum (1.49) when base thickness is 2.00 mm. The results reveal that the 1-3-2 piezoelectric composite will be suitable for application by changing the base thickness.

Effect of MnCO3 Doping on Microstructure and Electrical Properties of PSZT Ceramics

2014 ◽  
Vol 608 ◽  
pp. 187-192
Author(s):  
Arjin Boonruang ◽  
Piyalak Ngernchuklin ◽  
Saengdoen Daungdaw ◽  
Nestchanok Yongpraderm ◽  
Chutima Eamchotchawalit
Keyword(s):  
Fracture Behavior ◽  
Single Phase ◽  
Mechanical Quality Factor ◽  
Phase Identification ◽  
Sintering Process ◽  
Electromechanical Properties ◽  
Manganese Doping ◽  
Mechanical Quality ◽  
Conventional Sintering ◽  
Quality Factor Q

The effect of manganese doping on microstructure, piezoelectric and electromechanical properties of Pb0.94Sr0.06(Zr0.52Ti0.48)O3 (PSZT) ceramics has studied. The PSZT ceramics doped MnCO3 concentration in the region of 0-1.0 mol% were prepared by a solid-state reaction and conventional sintering process. Phase identification showed the formation of single phase perovskite structure in all compositions. Microstructure and fracture behavior were observed by scanning electron microscopy (SEM). The fracture behavior demonstrated the change of fracture type from trangranular to mix of trans-and inter-granular type with increasing the amount of MnCO3. Dielectric constant (K), d33 and kp were increased when higher amount of MnCO3 was doped. In addition, the mechanical quality factor (Qm) was highest at 0.1 mol% MnCO3 doping in PSZT ceramics.

Effects of Mn-Doping on the Piezoelectric and Ferroelectric Properties of (Na0.8K0.2)0.5Bi0.5TiO3 Ceramics

2008 ◽  
Vol 368-372 ◽  
pp. 69-71 ◽  
Author(s):  
Xiang Ping Jiang ◽  
Long Zhu Li ◽  
Fu Lan Jiang ◽  
Yan Yan Zheng ◽  
Li Hua Liu
Keyword(s):  
Solid State ◽  
Dielectric Loss ◽  
Grain Growth ◽  
Remnant Polarization ◽  
Piezoelectric Properties ◽  
Ferroelectric Properties ◽  
Mechanical Quality Factor ◽  
Lead Free ◽  
Mn Doping ◽  
Mechanical Quality

Lead-free piezoelectric ceramics of (Na0.8K0.2)0.5Bi0.5TiO3+x wt.% Mn (abbreviated as NBKT-x% Mn, x=0~0.5) were synthesized by solid-state reaction. The grain growth of the ceramics was restrained by Mn-doping at a certain extent. The mechanical quality factor Qm increases and the dielectric loss tanδ decreases with the increase of Mn-doping. Best piezoelectric properties were obtained for the composition of NKBT-0.2%Mn: d33=158 pC·N-1, tanδ=2.9% at 1 kHz, Qm=110 and kp=30%. The P-E loops show that remnant polarization Pr and coercive field Ec decrease slightly with the amount of the Mn2+ increasing up to 0.2wt.% and then increase as the content of Mn2+ increases further. NKBT-0.5wt. % Mn exhibits strong ferroelectricity with remnant polarization Pr = 38μC/cm2.

Influence of Thickness Parameters on 2-2 Cement Based Piezoelectric Composite

2009 ◽  
Vol 79-82 ◽  
pp. 31-34 ◽  
Author(s):  
Xin Cheng ◽  
Dong Yu Xu ◽  
Li Li Guo ◽  
Shi Feng Huang
Keyword(s):  
Electromechanical Coupling ◽  
Lead Zirconate ◽  
Mechanical Quality Factor ◽  
Lead Magnesium Niobate ◽  
Piezoelectric Composite ◽  
Electromechanical Coupling Coefficient ◽  
Electromechanical Properties ◽  
Lead Magnesium ◽  
Piezoelectric Strain ◽  
Tan Δ

2-2 cement based piezoelectric composite was fabricated using sulphoaluminate cement and lead magnesium niobate-lead zirconate-lead titanate ceramic (P(MN)ZT) by dice-and-fill technique. The effects of composite thickness on dielectric, piezoelectric and electromechanical properties of the composite were analyzed, respectively. The results show that the increase of composite thickness will improve the piezoelectric strain factor d33 of the composite, while decreases the piezoelectric voltage factor g33 of the composite. The relative dielectric factor εr as well as the dielectric loss tan δ of the composite also increases with increasing the thickness. The electromechanical analysis results show that the thickness electromechanical coupling coefficient Kt of the composite increases obviously with decreasing the thickness, meanwhile the mechanical quality factor Qm of the composite shows the increasing trend, thus, the receiving piezoelectric transducers can be fabricated by decreasing the thickness.

Effect of Al2O3 Addition on Dielectric, Piezoelectric and Ferroelectric Properties of 0.2Pb(Zn1/3Nb2/3)O3–0.8Pb(Zr1/2Ti1/2)O3 Ceramics

2008 ◽  
Vol 55-57 ◽  
pp. 89-92
Author(s):  
Athipong Ngamjarurojana ◽  
Supon Ananta ◽  
Rattikorn Yimnirun
Keyword(s):  
Crystal Structure ◽  
Electrical Properties ◽  
Curie Temperature ◽  
Phase Boundary ◽  
Ferroelectric Properties ◽  
Mechanical Quality Factor ◽  
Al2o3 Content ◽  
Morphotropic Phase Boundary Composition ◽  
Phase Boundary Composition ◽  
Mechanical Quality

The structure and electrical properties of Al2O3-doped 0.2Pb(Zn1/3Nb2/3)O3-0.8Pb(Zr1/2Ti1/2)O3 ceramic, which is the morphotropic phase boundary composition of the PZN-PZT system, were investigated. The addition of Al2O3 content transformed the crystal structure rom coexisting with rhombohedral to purely tetragonal structure. Furthermore, addition of Al2O3 decreased r, d33 and kp, but increased Curie temperature and enhanced the mechanical quality factor. inally, the P–E and s-E loops demonstrated decreased Pr, Ec and strain level with addition of Al2O3

Anisotropy of electromechanical parameters of a single-layer composite of the piezoceramic - polymer system

2021 ◽  
Vol 575 (1) ◽  
pp. 29-32
Author(s):  
D. I. Makarev ◽  
N. A. Shvetsova ◽  
A. N. Reznichenko ◽  
M. A. Lugovaya
Keyword(s):  
Polymer System ◽  
Single Layer ◽  
Layer Composite

scholarly journals Transport and Electromechanical Properties of Ca3TaGa3Si2O14 Piezoelectric Crystals at Extreme Temperatures

MRS Advances ◽  
2019 ◽  
Vol 4 (09) ◽  
pp. 515-521
Author(s):  
Yuriy Suhak ◽  
Ward L. Johnson ◽  
Andrei Sotnikov ◽  
Hagen Schmidt ◽  
Holger Fritze
Keyword(s):  
Secondary Ion Mass Spectrometry ◽  
Tone Burst ◽  
Total Conductivity ◽  
Transport Mechanisms ◽  
Electromechanical Properties ◽  
Self Diffusion ◽  
Oxygen Ion ◽  
Piezoelectric Strain ◽  
Secondary Ion ◽  
Diffusion Profiles

ABSTRACTTransport mechanisms in structurally ordered piezoelectric Ca3TaGa3Si2O14 (CTGS) single crystals are studied in the temperature range of 1000-1300 °C by application of the isotope 18O as a tracer and subsequent analysis of diffusion profiles of this isotope using secondary ion mass spectrometry (SIMS). Determined oxygen self-diffusion coefficients enable calculation of oxygen ion contribution to the total conductivity, which is shown to be small. Since very low contributions of the cations have to be expected, the total conductivity must be dominated by electron transport. Ion and electron conductivities are governed by different mechanisms with activation energies (1.9±0.1) eV and (1.2±0.07) eV, respectively. Further, the electromechanical losses are studied as a function of temperature by means of impedance spectroscopy on samples with electrodes and a contactless tone-burst excitation technique. At temperatures above 650 °C the conductivity-related losses are dominant. Finally, the operation of CTGS resonators is demonstrated at cryogenic temperatures and materials piezoelectric strain constants are determined from 4.2 K to room temperature.

The Further Exploration of Applying Small-Strain and Large-Strain Formulations to SMA

2012 ◽  
Vol 529 ◽  
pp. 228-235
Author(s):  
Jie Yao ◽  
Yong Hong Zhu
Keyword(s):  
Phase Transformation ◽  
Constitutive Model ◽  
Uniaxial Tension ◽  
Driving Force ◽  
Research Team ◽  
Large Strain ◽  
Small Deformation ◽  
Small Strain ◽  
Proportional Loading ◽  
The Difference

Recently, our research team has been considering to applying shape memory alloys (SMA) constitutive model to analyze the large and small deformation about the SMA materials because of the thermo-dynamics and phase transformation driving force. Accordingly, our team use simulations method to illustrate the characteristics of the model in large strain deformation and small strain deformation when different loading, uniaxial tension, and shear conditions involve in the situations. Furthermore, the simulation result unveils that the difference is nuance concerning the two method based on the uniaxial tension case, while the large deformation and the small deformation results have huge difference based on shear deformation case. This research gives the way to the further research about the constitutive model of SMA, especially in the multitiaxial non-proportional loading aspects.

Plastic Forming Processes Through Rotating Conical Dies1

2001 ◽  
Vol 68 (6) ◽  
pp. 894-902 ◽  
Author(s):  
D. Durban ◽  
G. Davidi ◽  
D. Lior
Keyword(s):  
Single Phase ◽  
Large Strain ◽  
Single Layer ◽  
Wall Friction ◽  
Nonlinear Ordinary Differential Equations ◽  
Tube Forming ◽  
Perfectly Plastic ◽  
Governing System ◽  
Plastic Forming ◽  
Exact Relations

Drawing and extrusion of single-phase and multilayered tubes through rotating conical dies is investigated within the framework of continuum plasticity. Large strain perfectly plastic J2 flow theory models constitutive behavior along with a radial-helical flow pattern. The governing system for a single-layer process is reduced to three coupled nonlinear ordinary differential equations. An approximate solution is developed for long and tapered working zones with low wall friction. That solution is used to simulate the field within each layer in composite tube forming. Exact relations are derived for the n-layered tube and it is shown that wall rotation can considerably reduce the required working loads. Dedicated to Professor Dietmar Gross on the occasion of his 60th birthday

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