scholarly journals Characterization of Ferroelectric Materials by Photopyroelectric Method

10.5772/19294 ◽  
2011 ◽  
Author(s):  
Dadarlat Dorin ◽  
Longuemart Stephane ◽  
Hadj Sahraoui
Keyword(s):  
Ferroelectric Materials

scholarly journals Synthesis and characterization of PZT 52/48 ceramics without additives througt nanomertric powder

2021 ◽  
Vol 26 (2) ◽  
Author(s):  
Jaime Alberto Sanchez Caceres ◽  
Carlos Augusto Carlos Passos ◽  
João Victor Soares Chagas
Keyword(s):  
Synthesis Method ◽  
Ferroelectric Materials ◽  
Ferroelectric Ceramics ◽  
Mean Grain Size ◽  
Potential Applications ◽  
Synthesis And Processing ◽  
Electrical Permittivity ◽  
Ferroelectric Hysteresis ◽  
The Cost

ABSTRACT Lead zirconatetitanate solid solutions, Pb(Zr1-xTix)O3 – PZT, are widely recognized for representing a special group of ferroelectric materials with various potential applications in electroceramics and (micro)electronic devices. The PZT ceramics is produced by solid state reaction (conventional route) and temperatures frequently above 1200 °C. As a consequence, the cost of ceramic product is expensive. Herein, we present the synthesis and processing conditions of PZT52/48 (x = 0.48) ceramics in which it was possible to lower the sintering temperature down to around 900°C. We have applied a route for PZT52/48 obtaining ferroelectric ceramics through sintering of nanometric powders prepared by the polymeric precursor synthesis method (modified Pechini’s method). The sintering was achieved with a temperature of 900ºC for 2 hours and the samples got 96% of their theoretical density and 1.3 mm mean grain size. The electrical permittivity of the ceramic plates, studied by impedance spectroscopy, presented Curie temperature around 390 ºC. Ferroelectric hysteresis measurements revealed that the remnant polarization is 3.2 μC/cm2 and coercive field is 10 kV/cm at 60 Hz. All results and characterizations have shown that the PZT samples obtained with the polymeric route are efficient as the ones prepared in the conventional SSR protocol.

ELECTRORHEOLOGY OF DISPERSIONS OF BaxSr(1-x)TiO3 IN SILICONE OIL UNDER AC OR DC ELECTRIC FIELD

2012 ◽  
Vol 26 (14) ◽  
pp. 1250081 ◽  
Author(s):  
GLAUBER M. S. LUZ ◽  
ANTONIO J. F. BOMBARD ◽  
SILVIO L. M. BRITO ◽  
DOUGLAS GOUVÊA ◽  
SHEILA L. VIEIRA
Keyword(s):  
Shear Stress ◽  
Shear Rate ◽  
Electric Field ◽  
Silicone Oil ◽  
Ferroelectric Materials ◽  
Dc Electric Field ◽  
Ac Fields ◽  
Er Fluid ◽  
Constant Shear Rate

Electrorheology (ER) of ferroelectric materials such as nanometric BaTiO 3 is still not fully understood. In this paper, nanoparticles of Ba x Sr (1-x) TiO 3 (where x = 0.8, 0.9 or 1.0) were synthesized using the method of Pechini, calcinated at 950°C, and after, lixiviated under pH 1 or pH 5. A controlled stress rheometer (MCR-301) was used to make the ER characterization of dispersions made of Ba x Ti 1-x O 3 in silicone oil (30% w/w), where (a) shear stress as a function of DC electric field (under constant shear rate) or (b) shear stress as a function of shear rate (under constant AC or DC electric field) were measured. We observed that electrophoresis occurred under electric field DC, creating a concentration gradient which induced phase separation in ER fluid. On the other hand, under AC fields above 1 kV/mm, the ER effect is stronger than for DC field, and almost without electrophoresis. Furthermore, there is an AC frequency, dependent on the disperse phase, where the ER effect has a maximum.

Characterization of ferroelectric materials by methods of nonlinear dynamics

1992 ◽  
Vol 126 (1) ◽  
pp. 209-214 ◽  
Author(s):  
Martin Diestelhorst ◽  
Eckart Brauer ◽  
Horst Beige
Keyword(s):  
Nonlinear Dynamics ◽  
Ferroelectric Materials

Piezoelectric Characterization of Bulk and Thin Film Ferroelectric Materials using Fiber Optics

1996 ◽  
Vol 433 ◽  
Author(s):  
J.T. Dawley ◽  
G. Teowee ◽  
B.J.J. Zelinski ◽  
D.R. Uhlmann
Keyword(s):  
Thin Film ◽  
Fiber Optics ◽  
Piezoelectric Properties ◽  
Piezoelectric Effect ◽  
Ferroelectric Materials ◽  
Data Sets ◽  
Ceramic Thin Films ◽  
Optical Lever ◽  
Converse Piezoelectric Effect

AbstractIn this study, the use of a fiber optic technique for the measurement of the piezoelectric properties of ferroelectric bulk and thin film samples was investigated. The strain and piezoelectric properties (namely the d33 coefficients) were measured using the MTI-2000 Fotonic Sensor, which uses the principle of the optical lever to resolve very small changes in sample displacement (1 Å). Using this technique, we were able to detect the very small strains associated with the converse piezoelectric effect for PVDF films and bulk PZT samples, and correlate the results with data acquired from direct piezoelectric effect measurement. Comparison of the data sets prove that the optical lever would be a useful optical technique for measuring of the d33 values of ceramic thin films, such as BaTiO3, ZnO, and PZT.

Nanoscale Characterization of Ferroelectric Materials for Piezoelectric Applications

2006 ◽  
Vol 341 (1) ◽  
pp. 3-19 ◽  
Author(s):  
A. L. Kholkin ◽  
V. V. Shvartsman ◽  
D. A. Kiselev ◽  
I. K. Bdikin
Keyword(s):  
Ferroelectric Materials ◽  
Nanoscale Characterization
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