Investigation of Field-Induced Piezoelectric Properties in Pb(Mg1/3Nb2/3)O3-PbTiO3 Ceramics for Transducer Applications

2007 ◽  
Vol 336-338 ◽  
pp. 58-61
Author(s):  
M.H. Lente ◽  
A.L. Zanin ◽  
D. Garcia ◽  
José Antônio Eiras ◽  
L. Leija ◽  
...  
Keyword(s):  
Electric Field ◽  
Electromechanical Coupling ◽  
Piezoelectric Properties ◽  
Ultrasonic Transducer ◽  
Bias Field ◽  
Induced Polarization ◽  
Electromechanical Properties ◽  
Conventional Sintering ◽  
Coupling Factors ◽  
Sintering Method

Pb(Mg1/3Nb2/3)O3-PbTiO3 based ceramics were produced by conventional sintering method and their electric-field induced electromechanical properties were determined. Large fieldinduced electromechanical coupling factors, with high piezoelectric anisotropy, were obtained in this relaxor material at relatively low DC electric bias field. A circular ultrasonic transducer with non uniform radial induced polarization was constructed using this material for field diffraction control.

Electromechanical Properties of NKN-5LT Multilayer Actuator

2007 ◽  
Vol 26-28 ◽  
pp. 263-266 ◽  
Author(s):  
Min Soo Kim ◽  
Soon Jong Jeong ◽  
Jae Sung Song
Keyword(s):  
Electromechanical Coupling ◽  
Tape Casting ◽  
Electromechanical Coupling Factor ◽  
Coupling Factor ◽  
Electromechanical Properties ◽  
Wide Range ◽  
Conventional Sintering ◽  
Mechanical Transducer ◽  
Multilayer Actuator ◽  
Sintering Method

Li2O excess 0.95(Na0.5K0.5)NbO3-0.05LiTaO3 (NKN-5LT) ceramics were developed by conventional sintering method. Abnormal grain growth in NKN-5LT ceramics was observed with varying Li2O content during sintering. In the 1 mol% Li2O excess NKN-5LT samples sintered at 1000 oC for 4h in air, electromechanical coupling factor and piezoelectric constant of NKN-5LT ceramics were found to reach the highest values of 0.37 and 250 pC/N, respectively. Lead-free piezoelectric of the composition 1 mol% Li2O excess NKN-5LT were fabricated. 10×10×3 mm3 size multilayer ceramic actuators (MLCA) were fabricated by conventional tape casting method. The displacement of the MLCA was ~ 1 μm at 150 V. These results show that the NKN-5LT ceramics with reasonable good piezoelectric properties have the potential to become the next generation material for a wide range of electro-mechanical transducer applications.

scholarly journals Sintering and Characterization of (Li, Sb, Ta)-Modified (Na, K)NbO3 Lead-Free Ceramics

2011 ◽  
Vol 2011 ◽  
pp. 1-5
Author(s):  
Peng Qi ◽  
Juan Du ◽  
Guozhong Zang
Keyword(s):  
Electromechanical Coupling ◽  
Piezoelectric Properties ◽  
Lead Free ◽  
Lead Free Ceramics ◽  
Different Temperatures ◽  
Piezoelectric Strain ◽  
Strain Coefficient ◽  
Coupling Factors ◽  
Sintering Method

Lead-free alkaline niobate-based piezoceramics, (Na0.52K0.435Li0.045)Nb0.87Sb0.08Ta0.05O3 (abbreviated KNLNT-S8), were prepared by conventional solid-state sintering method. The effects of sintering temperature on microstructure and piezoelectric properties of the (Li, Sb, Ta)-modified (Na, K) NbO3 were investigated. Microstructure of the samples sintered at different temperatures was observed by scanning electron microscopy (SEM) and optical microscopy. The KNLNT-S8 sample sintered at 1100°C possessed highest piezoelectric constant and high-field piezoelectric strain coefficient of 332 pC/N and 530 pm/V, respectively, with electromechanical coupling factors of 0.52 and of 0.48.

Structure and Piezoelectric Properties of (1-X)K0.49Na0.51NbO3-XLiTaO3 Lead-Free Piezoceramics

2010 ◽  
Vol 663-665 ◽  
pp. 1310-1313 ◽  
Author(s):  
Yue Ming Li ◽  
Liang Jiang ◽  
Zhong Yang Shen ◽  
Run Hua Liao ◽  
Zhu Mei Wang
Keyword(s):  
Phase Transition ◽  
Room Temperature ◽  
Electromechanical Coupling ◽  
Piezoelectric Properties ◽  
Lead Free ◽  
Electromechanical Coupling Coefficient ◽  
Orthorhombic Symmetry ◽  
Coexistence Region ◽  
Solid State Sintering ◽  
Sintering Method

Lead-free (1-x)K0.49Na0.51NbO3-xLiTaO3 (x=0.00-0.07) piezoceramics were fabricated by the conventional solid-state sintering method, the effects of LiTaO3 content on the phase structure and piezoelectric properties of the ceramics were investigated. All the ceramics show single perovskite structure with a phase transition from an orthorhombic symmetry to a tetragonal one across an orthorhombic-tetragonal coexistence region with 0.04<x<0.06. For the ceramic sample with x=0.05, due to the coexistence of orthorhombic and tetragonal phases near room temperature, enhanced piezoelectric constant d33=236 pC/N and planar electromechanical coupling coefficient kp=40.9% are observed. In addition to other good electrical properties such as εr=969, tgδ=0.015 and Qm=41, this ceramic is a promising lead-free piezoelectric material.

Research on Electromechanical Properties of Cymbal Piezocomposite Transducer

2005 ◽  
Vol 475-479 ◽  
pp. 1087-1090
Author(s):  
Deng Hua Li ◽  
Ke Li ◽  
Yang Cheng
Keyword(s):  
Electric Field ◽  
Transmission Coefficient ◽  
Coupling Coefficient ◽  
Applied Electric Field ◽  
Piezoelectric Ceramic ◽  
Electromechanical Coupling ◽  
Applied Force ◽  
Electromechanical Coupling Coefficient ◽  
Electromechanical Properties ◽  
Piezoelectric Phase

The electromechanical properties of cymbal piezocomposite transducer were investigated in this paper. Piezoelectric ceramic PZT—5A was used as piezoelectric phase of transducer, and brass foil was used as end cap electrode of cymbal piezocomposite transducer. Several types of this transducer were fabricated. The displacements of this transducer as functions of the applied force and the applied electric field were investigated. It was calculated and analyzed for the energy transmission coefficient and electromechanical coupling coefficient of this transducer which optimum values were obtained.

High-Performance Piezoelectric Single Crystals of Complex Perovskite Solid Solutions

MRS Bulletin ◽  
2009 ◽  
Vol 34 (4) ◽  
pp. 277-283 ◽  
Author(s):  
Zuo-Guang Ye
Keyword(s):  
Single Crystals ◽  
Solid Solutions ◽  
High Performance ◽  
Electromechanical Coupling ◽  
Piezoelectric Properties ◽  
High Strain ◽  
Complex Perovskite ◽  
Device Applications ◽  
Coupling Factors ◽  
Piezoelectric Performance

AbstractRelaxor-based single crystals of complex perovskite solid solutions, Pb(Mg1/3Nb2/3)O3–PbTiO3 [PMN–PT] and Pb(Zn1/3Nb2/3)O3–PbTiO3 [PZN–PT], exhibit extraordinary piezoelectric performance, with extremely high piezoelectric coefficients, very large electromechanical coupling factors, and exceptionally high strain levels. These materials outperform the currently used Pb(Zr1–xTix)O3 [PZT] ceramics, making them the materials of choice for the next generation of electromechanical transducers for a broad range of advanced applications. In this article, recent major advances in the development of piezocrystals are reviewed in terms of crystal growth, piezoelectric properties, crystal chemistry, domain structure, and device applications.

Effect of BaZr0.05Ti0.95O3 Addition on Microstructure and Piezoelectric Properties of Hydroxyapatite Bone

2012 ◽  
Vol 506 ◽  
pp. 166-169 ◽  
Author(s):  
N. Pisitpipathsin ◽  
P. Kantha ◽  
W. Leenakul ◽  
P. Sriprapha ◽  
Kamonpan Pengpat ◽  
...  
Keyword(s):  
Simulated Body Fluid ◽  
Human Body ◽  
Body Fluid ◽  
Piezoelectric Properties ◽  
Cellular Growth ◽  
Conventional Sintering ◽  
Potential Applications ◽  
Bioactive Composites ◽  
Sintering Method ◽  
Dielectric And Piezoelectric Properties

The aim of this study was to investigate the effect of BaZr0.05Ti0.95O3 (BZT) addition on the microstructure, physical, dielectric and piezoelectric properties of hydroxyapatite (HA), and develop new biomaterials which have potential applications in the support for cellular growth and in the system for bone regeneration. In this case the BaZr0.05Ti0.95O3- HA composites (HABZT) were prepared by conventional sintering method. The BZT were added to HA with ratio 0, 10, 20 and 30 %wt. Then the mixed powders were pressed and subsequently sintered at the temperature ranging from 1150 to 1350°C. The result showed that the dielectric and piezoelectric properties were improved by the addition of BZT. Moreover, the bioactivity of the HA improved with addition of BZT especially at 10% as evident by the formation of bone like apatite layers on the surface of all BCZT composites after soaking in simulated body fluid (SBF) for 15 days. The results confirmed the possibility of using these bioactive composites for treatment within the human body.

Improvement of Electromechanical Coupling Factor and Mechanical Quality Factor in PZT-PMN Ceramics by MnO2 Addition

2009 ◽  
Vol 421-422 ◽  
pp. 381-384
Author(s):  
Rungnapa Tipakontitikul ◽  
Amporn Kamonlert ◽  
Sukum Eitssayeam ◽  
Anuson Niyompan
Keyword(s):  
Electromechanical Coupling ◽  
Electromechanical Coupling Factor ◽  
Coupling Factor ◽  
Mechanical Quality Factor ◽  
Tetragonal Symmetry ◽  
X Ray Diffraction ◽  
Ceramic Structure ◽  
Mechanical Quality ◽  
Conventional Sintering ◽  
Sintering Method

PZT-PMN ceramic system with presence of MnO2 contents were proposed and prepared using conventional sintering method as for piezoelectric transformer application. Phase formation and several dielectric and piezoelectric parameters were studied as a function of MnO2 concentration. The x-ray diffraction study revealed the tetragonal symmetry for all samples with MnO2 doping. To determine polarization, the P-E hysteresis loop were produced and the results indicated that entering of Mn4+ ions in the ceramic structure created large amount of oxygen vacancies and the consequent was observed as displacement of the loops to E axis. The obtained optimum parameter are d33 = 119 pC/N, kp = 0.207, Qm = 1669, tan = 0.0101, Pr = 20 μm/cm2 and Ec = 10 kV/cm.

Piezoelectric Properties and Depolarization Temperatures of (Bi1/2Na1/2)TiO3-(Bi1/2K1/2)TiO3-BaTiO3 Lead-Free Piezoelectric Ceramics

2006 ◽  
Vol 320 ◽  
pp. 23-26 ◽  
Author(s):  
Yuji Hiruma ◽  
Kazushige Yoshii ◽  
Rintaro Aoyagi ◽  
Hajime Nagata ◽  
Tadashi Takenaka
Keyword(s):  
Electromechanical Coupling ◽  
Piezoelectric Properties ◽  
Sodium Titanate ◽  
Piezoelectric Ceramics ◽  
Lead Free ◽  
Bismuth Sodium Titanate ◽  
Depolarization Temperature ◽  
Potassium Titanate ◽  
Coupling Factors ◽  
Dielectric And Piezoelectric Properties

The piezoelectric properties of a solid solution based on the three components of bismuth sodium titanate, (Bi1/2Na1/2)TiO3 (BNT), bismuth potassium titanate, (Bi1/2K1/2)TiO3 (BKT), and barium titanate, BaTiO3 (BT), that is, x(Bi1/2Na1/2)TiO3-y(Bi1/2K1/2)TiO3-zBaTiO3 [BNBKy:z(x); x+y+z=1] are investigated. Fine piezoelectric properties in lead-free piezoelectric ceramics were obtained near the MPB composition, and the highest electromechanical coupling factors, k33 and kp, and piezoelectric constant, d33, were 0.58 and 0.36 for BNBK2:1(0.89) and 181 pC/N for BNBK2:1(0.88), respectively. In this study, we also measured the depolarization temperature, Td, from the temperature dependence of dielectric and piezoelectric properties.

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