Domain switching anisotropy in poled lead titanate zirconate ceramics under orthogonal electromechanical loading

2006 ◽  
Vol 100 (8) ◽  
pp. 084101 ◽  
Author(s):  
Fa-Xin Li ◽  
Dai-Ning Fang ◽  
Yuan-Ming Liu
Keyword(s):  
Lead Titanate ◽  
Domain Switching ◽  
Lead Titanate Zirconate ◽  
Electromechanical Loading

Time-Dependent Strain Responses of a Poled PZT Wafer Under Various Constant Magnitudes of Longitudinal Tensile Stress

2009 ◽  
Author(s):  
Sang-Joo Kim ◽  
Chang-Hoan Lee
Keyword(s):  
Tensile Stress ◽  
Lead Titanate ◽  
Domain Switching ◽  
Open Circuit ◽  
Time Dependent ◽  
Lead Titanate Zirconate ◽  
Dependent Strain ◽  
Free Energy Model ◽  
Strain Responses ◽  
Over Time

A commercially available soft lead titanate zirconate (PZT) wafer that is poled in thickness direction is subjected to various constant magnitudes of longitudinal tensile stress. The evolutions of longitudinal and transverse in-plane strains over time are measured in short- and open-circuit boundary conditions. The measurements are explained qualitatively in terms of domain switching and predicted quantitatively by a free energy model of normal distribution.

scholarly journals Domain switching energies: Mechanical versus electrical loading in La-doped bismuth ferrite–lead titanate

2011 ◽  
Vol 109 (5) ◽  
pp. 054109 ◽  
Author(s):  
T. Leist ◽  
K. G. Webber ◽  
W. Jo ◽  
T. Granzow ◽  
E. Aulbach ◽  
...  
Keyword(s):  
Lead Titanate ◽  
Domain Switching ◽  
Bismuth Ferrite ◽  
Electrical Loading ◽  
La Doped

Investigations on Multi-axial Domain Switching Criteria for Piezoceramics

2005 ◽  
Vol 881 ◽  
Author(s):  
Bernd Laskewitz ◽  
Dayu Zhou ◽  
Marc Kamlah
Keyword(s):  
Electric Field ◽  
Electric Fields ◽  
Domain Switching ◽  
Axial Stress ◽  
Initial Domain ◽  
Hollow Cylinders ◽  
Thin Walled ◽  
Electromechanical Loading ◽  
Stress States ◽  
Strain Responses

AbstractInitially unpoled soft PZT was subjected to a proportional, coaxial electromechanical loading. The ratio of compressive stress to electric field was changed between the experiments. From this series of nonlinear polarization and strain responses were obtained. Based on an offset method, initial domain switching states in the two-dimensional stress-electric field space were determined. In continuum mechanics, thin walled tubes are used to investigate multi-axial stress states. In this context, thin walled means a ratio of wall thickness to radius of 1:10 or thinner. However, simple linear dielectric analysis indicates an inhomogeneous electric field distribution in such geometries.Therefore, the suitability of hollow cylinders (in the range from thick to thin walled tubes) for multi-axial electromechanical experiments has to be investigated. Simulations with a finite element tool based on a phenomenological constitutive model for ferroelectric and ferroelastic hysteresis behavior were performed. The results confirm inhomogeneous distributions of electric fields and stresses after poling. A geometry variation is discussed to minimize these effects.

scholarly journals Gel Synthesis of Hexaferrites Pb1−xLaxFe12−xZnxO19 and Properties of Multiferroic Composite Ceramics PZT–Pb1−xLaxFe12−xZnxO19

Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1630
Author(s):  
Inna V. Lisnevskaya ◽  
Inga A. Aleksandrova
Keyword(s):  
Coupling Coefficient ◽  
Lead Titanate ◽  
Electromechanical Coupling ◽  
Electromechanical Coupling Coefficient ◽  
Magnetic Characteristics ◽  
Composite Ceramics ◽  
Magnetic Parameters ◽  
Lead Titanate Zirconate ◽  
Multiferroic Composite ◽  
Tan Δ

We investigated the opportunities for obtaining hexaferrites Pb1−xLaxFe12−xZnxO19 (x = 0–1) from citrate–glycerin gel and showed that synthesis occurs via the formation of the Fe3O4 phase; products with a small amount of hematite impurity Fe2O3 can be obtained after firing at 800 to 900 °C with 0 ≤ x ≤ 0.5. If x > 0.5, perovskite-like LaFeO3 is formed in samples, so that if x = 0.9–1, the synthesis products virtually do not contain phases with hexaferrite structures and represent a mixture of LaFeO3, Fe2O3, and Fe3O4. Within the range of 0 ≤ x ≤ 0.5, the electrical and magnetic characteristics of hexaferrites Pb1−xLaxFe12−xZnxO19 are slightly dependent on x and have the following average values: A relative permittivity ε/ε0 ~ 45, a dielectric loss tangent tan δ ~ 0.6, an electrical resistivity R ~ 109 Ohm cm, coercivity Hc ~ 3 kOe, saturation magnetization Ms ~ 50 emu/g, and remanent magnetization Mr ~ 25 emu/g. The magnetoelectric (ME) ceramics 50 wt.% PZTNB-1 + 50 wt.% Pb1−xLaxFe12−xZnxO19 (PZTNB-1 is an industrial piezoelectric material based on lead titanate zirconate (PZT) do not contain impurity phases and have the following characteristics: Piezoelectric coefficients d33 = 10–60 and −d31 = 2–30 pC/N, piezoelectric voltage coefficients g33 = 2–13 and −g31 = 1–5 mV m/N, an electromechanical coupling coefficient Kp = 0.03–0.13, magnetic parameters Hc = 3–1 kOe, Ms = 50–30, and Mr = 25–12 emu/g. The maximum ME coupling coefficient ΔE/ΔH ~ 1.75 mV/(cm Oe) was achieved with x = 0.5.

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