Ab initio piezoelectric properties of Al0.5Sc0.5N : Impact of alloy configuration on the d33,f piezoelectric strain coefficient

2017 ◽  
Vol 1 (5) ◽  
Author(s):  
P. Daoust ◽  
P. Desjardins ◽  
R. A. Masut ◽  
V. Gosselin ◽  
M. Côté
Keyword(s):  
Ab Initio ◽  
Piezoelectric Properties ◽  
Piezoelectric Strain ◽  
Strain Coefficient

scholarly journals Significance of Micro and Nano PZT Particles on Dielectric and Piezoelectric Properties of PZT-PVDF Composites

2016 ◽  
Vol 2 (3) ◽  
pp. 64
Author(s):  
GOWDHAMAN P ◽  
ANNAMALAI V ◽  
HARESH M PANDYA ◽  
KUMAR P R
Keyword(s):  
Piezoelectric Properties ◽  
Compositional Analysis ◽  
X Rays ◽  
Hot Press ◽  
X Ray Diffraction ◽  
Fixed Temperature ◽  
Voltage Coefficient ◽  
Piezoelectric Strain ◽  
Strain Coefficient ◽  
Dielectric And Piezoelectric Properties

PZT-PVDF composites were prepared using different particle size of PZT and a hot press apparatus has been used for making samples. The structural and compositional analysis of the composite sample was done by using Scanning Electron Microscope (SEM) and Energy Dispersive Analysis of X-rays (EDAX) respectively. The grain size of the ball milled PZT powder was analyzed using powder X-Ray Diffraction (XRD). The samples were poled at a fixed temperature for about an hour under different poling fields. The dielectric constant (?r) and the piezoelectric properties like piezoelectric strain coefficient (d33) and voltage coefficient (g33) of composite have been analyzed.

Ferroelectric and Piezoelectric Properties of Blends of Poly(Vinylidene Fluoride Trifluoroethylene) and a Graft Elastomer

1999 ◽  
Vol 600 ◽  
Author(s):  
J. Su ◽  
Z. Ounaies ◽  
J. S. Harrison
Keyword(s):  
Room Temperature ◽  
Remanent Polarization ◽  
Vinylidene Fluoride ◽  
Piezoelectric Properties ◽  
Mechanical Stiffness ◽  
Blend Films ◽  
Relative Composition ◽  
Poly Vinylidene Fluoride ◽  
Piezoelectric Strain ◽  
Strain Coefficient

AbstractA piezoelectric polymeric blend system has been developed. The system contains two components: ferroelectric poly(vinylidene fluoride-trifluoroethylene) and graft elastomer. The remanent polarization, Pr, and the piezoelectric strain coefficient, d31, of the blends have been studied as a function of relative composition of the two components, temperature and frequency. Both blended copolymer and graft unit in the elastomer contribute to the total crystallinity of the blend-system, and hence to the remanent polarization and piezoelectricity. The piezoelectric strain coefficient, d31, of the blend systems shows dependence on both the remanent polarization and the mechanical stiffness, which in turn are determined by the fraction of the two components in the blends. This mechanism makes it possible for the piezoelectric strain response of the blend to be tailored by adjusting the relative composition. Although Pr of the copolymer is higher than that of the blends, the blend films containing 75 wt.% copolymer exhibit a higher d31 at room temperature, possibly due to their lower modulus. The blend films containing 50 wt.% copolymer exhibit a constant value of d31, from room temperature to 70°C.

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.

Piezoelectric strain coefficient measurement based on elasto-optic effect of fiber

2014 ◽  
Vol 12 (s2) ◽  
pp. S20602-320603
Author(s):  
Tao Qin Tao Qin ◽  
Zhengyong Li Zhengyong Li ◽  
Chongqing Wu Chongqing Wu ◽  
Zhi Wang Zhi Wang
Keyword(s):  
Coefficient Measurement ◽  
Piezoelectric Strain ◽  
Strain Coefficient

Effects of Barium Substitution on the Structure and Properties of PSZT Piezoelectric Ceramics

2010 ◽  
Vol 650 ◽  
pp. 103-108
Author(s):  
Yu Hua Feng ◽  
Tie Zheng Pan ◽  
Xiang Qian Shen ◽  
Hao Jie Song ◽  
Li Ping Guo
Keyword(s):  
Curie Temperature ◽  
Structural Changes ◽  
Piezoelectric Properties ◽  
Relative Dielectric Constant ◽  
Piezoelectric Ceramics ◽  
X Ray Diffraction ◽  
Piezoelectric Strain ◽  
High Dielectric ◽  
Dielectric And Piezoelectric Properties ◽  
Piezoelectric Strain Constant

Piezoelectric ceramics with appropriate curie temperatures and high dielectric and piezoelectric performances are attractive for formations of ceramic/polymer piezoelectric composites. The PSZT ceramics with compositions of 0.98Pb1.0-xBaxTi0.48Zr0.52O3-0.02PbSbO3 (x=0.14~0.24) have been prepared by a conventional solid reaction process. The ceramic structures are analyzed by X-ray diffraction and the barium substitution leads to structural changes of the tetragonal and rhombohedral phases which constitute the perovskite PSZT ceramics, and lattice distortions. The curie temperature almost linearly decreases from 226 °C to 141 °C corresponding the barium content increases from 0.14 to 0.24 in the ceramics. The dielectric and piezoelectric properties are largely influenced by the barium substitution and when the barium content at vicinity of 0.22, the piezoelectric strain constant d33 exhibits a dramatic change. It is found that as the barium content around 0.22, the PSZT ceramic specimen is characterized with a low curie temperature Tc=156 °C, and satisfied dielectric and piezoelectric properties with the relative dielectric constant εr=5873, dielectric loss factor tanδ=0.0387, piezoelectric strain constant d33=578 pC/N.

PIEZOELECTRIC PROPERTIES OF CEMENT PIEZOELECTRIC COMPOSITES CONTAINING NANO-QUARTZ POWDERS

2020 ◽  
Vol 7 (2) ◽  
Author(s):  
Huang Hsing Pan ◽  
Wei-Ren Lin ◽  
Kuan Huang
Keyword(s):  
Health Monitoring ◽  
Electromechanical Coupling ◽  
Piezoelectric Properties ◽  
Relative Dielectric Constant ◽  
Cement Matrix ◽  
Electromechanical Coupling Coefficient ◽  
Cement Composites ◽  
Piezoelectric Composites ◽  
Structural Health ◽  
Piezoelectric Strain

In order to increase piezoelectric properties of 0-3 type cement piezoelectric composites (piezoelectric cement) developed for structural health monitoring, nano-quartz powders, as the replacement of cement matrix, were added into PZT/cement composites. The piezoelectric cement consists of 50% PZT and 50% cement by volume. Two gradations of PZT inclusions, single-grading and medium-grading, were chosen to fabricate the piezoelectric cement. Nano-quartz powders of 1% to 6% were added to form nano-quartz piezoelectric cement. Experimental results indicate that nano-quartz powders can reduce the porosity of piezoelectric cement. The single-grading piezoelectric cement (PSQ) with 4% nano-quartz powders and the medium-grading one (PMQ) with 2% have the lowest porosity. The maximum values on both piezoelectric strain factor d33 and relative dielectric constant εr always occur at the minimum porosity of nano-quartz piezoelectric cement. Both the PSQ and the PMQ have the optimum d33=104 pC/N. For the PSQ, 4% nano-quartz powders provide a 22% enhancement on thickness electromechanical coupling coefficient Kt. However, the effect of nano-quartz powders displays as less effective to the Kt of the PMQ due to non-uniform distribution of PZT particles. Nano-quartz piezoelectric cement has higher piezoelectric properties able to monitor and detect concrete structural health.

Piezoelectric Properties and Electric Field-Induced-Strains of Textured (Bi1/2K1/2)TiO3- BaTiO3 Ceramics

2013 ◽  
Vol 566 ◽  
pp. 50-53
Author(s):  
Fumiaki Kawada ◽  
Yuji Hiruma ◽  
Hajime Nagata ◽  
Tadashi Takenaka
Keyword(s):  
Electric Field ◽  
Grain Growth ◽  
Piezoelectric Properties ◽  
Density Ratio ◽  
Orientation Factor ◽  
Templated Grain Growth ◽  
Direction Parallel ◽  
Piezoelectric Strain ◽  
High Orientation ◽  
Piezoelectric Strain Constant

Grain-oriented 0.8(Bi1/2K1/2)TiO3-0.2BaTiO3 (BKT-BT20) ceramics were prepared by the Reactive Templated Grain Growth (RTGG) method. The BKT-BT20 ceramics sintered at 1070°C for 100 h. The grain-oriented BKT-BT20 exhibited relatively high orientation factor, F, of 0.87 and density ratio of 92%. A resistivity of textured BKT-BT20 was 1.29×1013 Ωcm. Piezoelectric strain constant, d33, and the normalized strain, d33*, of the textured BKTBT20 ceramic in the direction parallel (//) to the tape stacking direction were 117 pC/N and 243 pm/V (at 80 kV/cm), respectively.

Performance Evaluation of the Pre-Stressed Piezoelectric Unimorph Using Nonlinear Piezoelectric Properties

2010 ◽  
Author(s):  
Lae-Hyong Kang ◽  
Jae-Hung Han
Keyword(s):  
Elastic Modulus ◽  
Electric Fields ◽  
Piezoelectric Layer ◽  
Piezoelectric Actuators ◽  
Nonlinear Material ◽  
Stress Effects ◽  
Piezoelectric Strain ◽  
Strain Coefficient ◽  
Piezoelectric Unimorph ◽  
Piezoelectric Behavior

Piezoelectric actuators operate when the electric field (voltage) is applied to them. This piezoelectric behavior is defined using piezoelectric strain coefficients which are generally assumed to be constant. However, when high electric fields are applied to the piezoelectric actuators the piezoelectric strain constant may increase up to more than twice of the nominal value and, thus, cannot be considered as a constant value. Besides, in case of the pre-stressed piezoelectric unimorph actuators, the stress conditions inside piezoelectric actuators can affect piezoelectric behaviors. For reasons mentioned above, actuation performance of PUMPS actuator, which is one of the pre-stressed piezoelectric actuators developed by present authors, cannot be predicted accurately without consideration of piezoelectric nonlinearities such as voltage and stress effects. Generally, the piezoelectric behavior is mainly affected by the piezoelectric strain coefficient and the elastic modulus. Therefore, the voltage and stress effects on the piezoelectric strain coefficient and the elastic modulus of piezoelectric layer were investigated, and the results were used for prediction of actuation performance of PUMPS. Taking the nonlinear material properties of the piezoelectric layer into account, the actuation performance of PUMPS was accurately predicted in this study.

From ab initio forecast of piezoelectric properties to growth of piezoelectric single crystals

2008 ◽  
Vol 93 (25) ◽  
pp. 252901 ◽  
Author(s):  
Jun Xin ◽  
Yanqing Zheng ◽  
Haikuan Kong ◽  
Erwei Shi
Keyword(s):  
Ab Initio ◽  
Single Crystals ◽  
Piezoelectric Properties
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