scholarly journals Piezoelectric Properties of SrBi4Ti4O15 Ferroelectric Ceramics

2002 ◽  
Vol 17 (6) ◽  
pp. 1376-1384 ◽  
Author(s):  
Marlyse Demartin Maeder ◽  
Dragan Damjanovic ◽  
Cyril Voisard ◽  
Nava Setter
Keyword(s):  
Piezoelectric Coefficient ◽  
Domain Walls ◽  
High Pressures ◽  
Elevated Temperatures ◽  
Piezoelectric Properties ◽  
Ferroelectric Ceramics ◽  
Piezoelectric Response ◽  
Low Frequencies ◽  
Sintering Conditions ◽  
Weak Fields

The dynamic piezoelectric response of SrBi4Ti4O15 ceramics with Aurivillius structure was investigated at high alternating stress, low frequencies (0.01 to 100 Hz), and temperatures from 20 to 200 °C. The piezoelectric nonlinearity, observed only at high pressures (>10 MPa) and elevated temperatures (>150 °C), is interpreted in terms of contributions from non-180° domain walls. At weak fields, the frequency dependence of the longitudinal piezoelectric coefficient was explained in terms of Maxwell–Wagner piezoelectric relaxation. The Maxwell–Wagner units are identified as colonies that consist of highly anisotropic grains which sinter together, and whose distribution in the ceramic is strongly dependent on sintering conditions.

scholarly journals Quantitative analysis of the direct piezoelectric response of bismuth ferrite films by scanning probe microscopy

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Kento Kariya ◽  
Takeshi Yoshimura ◽  
Katsuya Ujimoto ◽  
Norifumi Fujimura
Keyword(s):  
Quantitative Analysis ◽  
Domain Structure ◽  
Scanning Probe Microscopy ◽  
Domain Walls ◽  
Piezoelectric Properties ◽  
Bismuth Ferrite ◽  
Scanning Probe ◽  
Piezoelectric Response ◽  
Probe Microscopy ◽  
Piezoelectric Force Microscopy

AbstractPolarisation domain structure is a microstructure specific to ferroelectrics and plays a role in their various fascinating characteristics. The piezoelectric properties of ferroelectrics are influenced by the domain wall contribution. This study provides a direct observation of the contribution of domain walls to the direct piezoelectric response of bismuth ferrite (BiFeO3) films, which have been widely studied as lead-free piezoelectrics. To achieve this purpose, we developed a scanning probe microscopy-based measurement technique, termed direct piezoelectric response microscopy (DPRM), to observe the domain structure of BiFeO3 films via the direct piezoelectric response. Quantitative analysis of the direct piezoelectric response obtained by DPRM, detailed analysis of the domain structure by conventional piezoelectric force microscopy, and microscopic characterisation of the direct piezoelectric properties of BiFeO3 films with different domain structures revealed that their direct piezoelectric response is enhanced by the walls between the domains of spontaneous polarisation in the same out-of-plane direction.

Dielectric and Piezoelectric Properties of Niobium-modified BiInO3–PbTiO3 Perovskite Ceramics with High Curie Temperatures

2005 ◽  
Vol 20 (8) ◽  
pp. 2067-2071 ◽  
Author(s):  
Shujun Zhang ◽  
Ru Xia ◽  
Clive A. Randall ◽  
Thomas R. Shrout ◽  
Runrun Duan ◽  
...  
Keyword(s):  
Electrical Resistivity ◽  
Dielectric Loss ◽  
Curie Temperature ◽  
Piezoelectric Coefficient ◽  
Elevated Temperatures ◽  
Piezoelectric Properties ◽  
Perovskite Phase ◽  
Perovskite Ceramics ◽  
Curie Temperatures ◽  
Dielectric And Piezoelectric Properties

Piezoelectric ceramics with TC > 500 °C were projected in the perovskite BiInO3–PbTiO3 (BIPT) system based on their low tolerance factor (∼0.884). However, a stable perovskite phase could be synthesized only when the PbTiO3 (PT) content was greater than 75%. Furthermore, the large tetragonality (c/a > 1.08) and low electrical resistivity made the ceramics difficult to pole. Niobium-modified BIPT ceramics with PT contents of 80% and 85% were found to possess significantly lower dielectric loss at elevated temperatures, making it possible to polarize the materials. Piezoelectric properties were measured for a BIPT85–1.5 mol% Nb composition with a Curie temperature of 542 °C; the longitudinal piezoelectric coefficient and coercive field were found to be 60 pC/N and 125 kV/cm, respectively.

Effect of Additive Glycerol on Piezoelectric Properties of Modified Sol-Gel (Ba0.85Ca0.15)(Ti0.9Zr0.1)O3 Ceramics

2020 ◽  
Vol 993 ◽  
pp. 791-798
Author(s):  
Haibibu Aziguli ◽  
Tao Zhang ◽  
Ping Yu
Keyword(s):  
Grain Size ◽  
Electromechanical Coupling ◽  
Piezoelectric Coefficient ◽  
Piezoelectric Properties ◽  
Environmental Concern ◽  
Sol Gel ◽  
Lead Free ◽  
Piezoelectric Response ◽  
Electromechanical Coupling Coefficient ◽  
Ceramic Powders

Ba0.85Ca0.15Ti0.9Zr0.1O3 (BCTZ) ceramics, one of the lead-free pizoelectric materials, were focused due to the environmental concern against lead. A modified BCTZ powder sol-gel fabrication process was experimentally introduced with the addition of glycerol, in order to provide an effective approach to optimize the piezoelectric response of BCTZ ceramics. The results showed that the piezoelectric properties enhanced in terms of the piezoelectric coefficient of d33, 510 pC/N and the electromechanical coupling coefficient of kp, 0.501. The enhancement in electrical properties, such as dielectric, ferroelectric and piezoelectric, could be related to the homogenous microstructure and larger grain size of BCTZ ceramic powders after the introduction of glycerol during the modified sol-gel strategy.

scholarly journals Elastic and Dielectric Evaluation of the Piezoelectric Response of Ferroelectrics Using Unpoled Ceramics

Ceramics ◽  
2018 ◽  
Vol 1 (2) ◽  
pp. 211-228 ◽  
Author(s):  
Francesco Cordero
Keyword(s):  
Electromechanical Coupling ◽  
Piezoelectric Properties ◽  
Electromechanical Coupling Factor ◽  
Coupling Factor ◽  
Ferroelectric Ceramics ◽  
Piezoelectric Response ◽  
Single Temperature ◽  
High Level ◽  
Ferroelectric Transition Temperature ◽  
Elastic Softening

The evaluation of the piezoelectric properties of ferroelectric ceramics generally has a high level of uncertainty, due to incomplete poling, porosity, domain wall clamping and other effects. In addition, the poling process is often difficult and dangerous, due to the risk of breaking or damaging the sample. A method is described for the evaluation of the potential intrinsic piezoelectric response that a ceramic would have after full poling, without poling it. The method relies on the fact that any material undergoes an elastic softening below the ferroelectric transition temperature, whose magnitude can be expressed in terms of the intrinsic piezoelectric and dielectric coefficients of the material. Such a softening is equivalent to an electromechanical coupling factor averaged over all the components, due to the unpoled state of the sample, and can be deduced from a single temperature scan of an elastic modulus of a ceramic sample, spanning the ferroelectric and paraelectric states. The strengths, limits and possible applications of the method are discussed.

Ferroelectric and Piezoelectric Properties of (1-x)BaTi0.8Zr0.2O3-xBa0.7Ca0.3TiO3 Ceramics Prepared by Sol-Gel Technique

2010 ◽  
Vol 148-149 ◽  
pp. 1480-1485 ◽  
Author(s):  
Zhong Wen Tan ◽  
Wei Guo Fu ◽  
Xiang Yun Deng ◽  
Ren Bo Yang ◽  
Xiao Fen Guan ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Solid State ◽  
Piezoelectric Coefficient ◽  
Piezoelectric Properties ◽  
Sol Gel ◽  
Piezoelectric Response ◽  
Maximum Dielectric Constant ◽  
Gel Technique ◽  
Sintered Temperature ◽  
Ferroelectric And Piezoelectric Properties

The(1-x)BaTi0.8Zr0.2O3-xBa0.7Ca0.3TiO3 ceramics have been prepared by sol-gel technique, where x is from 0.2 to 0.6. It reveals that the dense ceramics can be obtained when the sintered temperature is above 1250°C. It is lower than that of solid state reaction ceramics. In particular, when x=0.3, at which is near the MPB composition, the ferroelectric and piezoelectric properties are more excellent than the others. The maximum dielectric constant is above 9000, which can be observed in the butterfly shape curves of dielectric constant as a function of electric field. The maximum piezoelectric coefficient d33 can reach 400 pm/V, and it is obtained from the piezoelectric response loops.

Nonlinear Dielectric and Piezoelectric Responses in (Bi, La)FeO3-Pb(Ti, Mn)O3 Ceramics

2012 ◽  
Vol 1397 ◽  
Author(s):  
Guiyang Shi ◽  
Shundong Bu ◽  
Rui Dai ◽  
Shengwen Yu ◽  
Jinrong Cheng
Keyword(s):  
Electric Fields ◽  
Dielectric Response ◽  
Piezoelectric Coefficient ◽  
Domain Walls ◽  
Piezoelectric Properties ◽  
Nonlinear Coefficient ◽  
Solid State Reaction Method ◽  
Nonlinear Dielectric ◽  
Rayleigh Law ◽  
Applied Fields

ABSTRACTPolycrystalline solutions of 0.6(Bi0.9La0.1)FeO3-0.4Pb(Ti1-xMnx)O3(BLF-PTM, x=0 and 0.01)have been fabricated by the so-gel process combined with a solid state reaction method. BLF-PTM exhibits the nonlinear dielectric and piezoelectric responses under applied fields. Rayleigh law has been used to evaluate the irreversible contribution of the domain walls movement to the nonlinear dielectric response. Rayleigh analysis reveals that a mechanism with no associated loss exists in the BLF-PTM of x=0.01. The real part piezoelectric coefficient of BLF-PTM linearly increases with increasing the electric fields. The dielectric and piezoelectric nonlinear coefficient of 0.17×10-3 m/V and 0.897 ×10-17 m2/V2 respectively are obtained for BLF-PTM of x=0.01,which are smaller than those of 0.22×10-3 m/V and 1.19 ×10-17 m2/V2 for BLF-PTM of x=0. Our results indicate that Mn doping increase the intrinsic piezoelectric properties of BLF-PTM reducing the extrinsic contributions to piezoelectric responses.

scholarly journals Ferroelectricity and Large Piezoelectric Response of AlN/ScN Superlattice

2018 ◽  
Author(s):  
Mohammad Noor-A-Alam ◽  
Oskar Olszewski ◽  
Michael Nolan
Keyword(s):  
Density Functional ◽  
Tensile Strain ◽  
Piezoelectric Coefficient ◽  
Piezoelectric Properties ◽  
Piezoelectric Response ◽  
Functional Theory ◽  
Epitaxial Strain ◽  
Biaxial Tensile Strain ◽  
Ferroelectric And Piezoelectric Properties ◽  
External Strain

Based on density functional theory, we investigate the ferroelectric and piezoelectric properties of the AlN/ScN superlattice. We find that the polar wurzite (w-ScAlN) structure is mechanically and dynamically stable, and is more stable than the nonpolar hexagonal flat configuration. We show that ferroelectric polarization switching can be possible for epitaxially tensile strained superlattice. Due to the elastic constant C33 softening along with an increase in e33, the piezoelectric coefficient d33 of the superlattice is doubled compared to pure w-AlN. The combined enhancement of Born effective charges (Z33) and the sensitivity of the atomic co-ordinates to external strain (\frac{\partial u_{3}}{\partial\eta_{3}}) is the origin of large piezoelectric constant e33. Moreover, we show that epitaxial biaxial tensile strain significantly enhances the piezo-response, so that d33 is seven times larger than that of w-AlN at 4% strain. The tensile strain results in a huge enhancement in e33by increasing Z33 and \frac{\partial u_{3}}{\partial\eta_{3}}, which boosts the piezoelectric coefficient. As both superlattice growth and epitaxial strain are already experimentally demonstrated in wurzite nitrides, our results show a new, more controlled approach to significantly enhance and tune the piezoelectric response of w-AlN materials.

scholarly journals Elastic and Dielectric Evaluation of the Piezoelectric Response of Ferroelectrics Using Unpoled Ceramics

2018 ◽  
Author(s):  
Francesco Cordero
Keyword(s):  
Transition Temperature ◽  
Electromechanical Coupling ◽  
Piezoelectric Properties ◽  
Ferroelectric Ceramics ◽  
Piezoelectric Response ◽  
Poling Process ◽  
Single Temperature ◽  
High Level ◽  
Ferroelectric Transition Temperature ◽  
Elastic Softening

The evaluation of the piezoelectric properties of ferroelectric ceramics generally has a high level of uncertainty, due to incomplete poling, porosity, domain wall clamping and other effects. In addition, the poling process is often difficult and dangerous, due to the risk of breaking or damaging the sample. A method is described for the evaluation of the potential intrinsic piezoelectric response that a ceramic would have after full poling, without poling it. The method relies on the fact that any material undergoes an elastic softening below the ferroelectric transition temperature, whose magnitude can be expressed in terms of the intrinsic piezoelectric and dielectric coefficients of the material. Such a softening is equivalent to an electromechanical coupling, averaged over all the components due to the unpoled state of the sample, and can be deduced from a single temperature scan of an elastic modulus of a ceramic sample, spanning the ferroelectric and paraelectric states. The strengths, limits and possible applications of the method are discussed.

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