Characterization of the Dielectric and Pyroelectric Properties of Ferroelectric Material

2008 ◽  
Vol 57 (9) ◽  
pp. 1939-1948 ◽  
Author(s):  
B. Ando ◽  
P. Giannone ◽  
S. Graziani ◽  
N. Pitrone
Keyword(s):  
Ferroelectric Material ◽  
Pyroelectric Properties

Characterization of New Nonstoichiometric Ferroelectric (Li0.95Cu0.15)Ta0.76Nb0.19O3 and Comparative Study With (Li0.95Cu0.15)Ta0.57Nb0.38O3 as Photocatalysts in Microbial Fuel Cells

2018 ◽  
Vol 16 (2) ◽  
Author(s):  
S. Louki ◽  
N. Touach ◽  
A. Benzaouak ◽  
V. M. Ortiz-Martínez ◽  
M. J. Salar-García ◽  
...  
Keyword(s):  
Power Density ◽  
Microbial Fuel Cells ◽  
Removal Rate ◽  
Oxygen Demand ◽  
Ferroelectric Material ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Uv Visible

This work investigates the photocatalytic activity of new ferroelectric material with formula (Li0.95Cu0.15)Ta0.76Nb0.19O3 (LT76) in a single chamber microbial fuel cell (MFC) and compares its performance with the similar photocatalyst (Li0.95Cu0.15)Ta0.57Nb0.38O3 (LT57). The photocatalysts LT76 and LT57 were synthesized by ceramic route under the same conditions, with the same starting materials. The ratio Ta/Nb was fixed at 4.0 and 1.5 for LT76 and LT57, respectively. These phases were characterized by different techniques including X-ray diffraction (XRD), transmission electronic microscopy (TEM), particle size distribution (PSD), differential scanning calorimetry (DSC), and ultraviolet (UV)–visible (Vis). The new photocatalyst LT76 presents specific surface area of 0.791 m2/g and Curie temperature of 1197 °C. The photocatalytic efficiency of this material is assessed in terms of wastewater treatment and electricity generation by power density and removal rate of chemical oxygen demand (COD) in the presence of a light source. The values of maximum power density and COD removal were 19.77 mW/m3 and 93%, respectively, for LT76.

Electro-Active Polymer-Ceramic Composites for Piezoelectric and Pyroelectric Applications

1993 ◽  
Vol 305 ◽  
Author(s):  
C. Dias ◽  
D. K. Das-Gupta
Keyword(s):  
Particle Size ◽  
Dielectric Constant ◽  
Theoretical Model ◽  
Lead Titanate ◽  
Ceramic Composites ◽  
Pyroelectric Properties ◽  
Titanate Ceramic

AbstractPresent work reports the results of a study of characterization of dielectric, piezoelectric and pyroelectric properties of calcium modified lead titanate ceramic/poly (vinylidene-trifluorethylene) composites with zero-three connectivity. The paper also presents a theoretical model to optimize such properties with respect to particle size, dielectric constant and composition.

scholarly journals Elaboration and dielectric characterization of a doped ferroelectric material type PZT

2015 ◽  
Vol 5 (2) ◽  
pp. 210
Author(s):  
M Abba ◽  
Z Necira ◽  
N Abdessalem ◽  
A Meklid ◽  
H Menasra ◽  
...  
Keyword(s):  
Ferroelectric Material ◽  
Dielectric Characterization ◽  
Material Type

Characterization of piezoelectric and pyroelectric properties of MOVPE-grown strained (111)A InGaAs/GaAs QW structures by modulation spectroscopy

2003 ◽  
Vol 195 (1) ◽  
pp. 260-264 ◽  
Author(s):  
Soohaeng Cho ◽  
Jongseok Kim ◽  
A. Sanz-Hervás ◽  
A. Majerfeld ◽  
G. Patriarche ◽  
...  
Keyword(s):  
Pyroelectric Properties ◽  
Modulation Spectroscopy

Fabrication and Characterization of Lead Zirconate Titanate (PZT) Thin Films by Sol–Gel Technique

2016 ◽  
Vol 15 (03) ◽  
pp. 1640002
Author(s):  
M. F. Rahman ◽  
L. Miglioli
Keyword(s):  
Lead Zirconate Titanate ◽  
Indium Tin Oxide ◽  
Sol Gel ◽  
Lead Zirconate ◽  
Ferroelectric Material ◽  
Zirconate Titanate ◽  
Coating Method ◽  
Gel Technique ◽  
Sol Gel Films

In this work, thin lead zirconate titanate, Pb[Zr[Formula: see text]Ti[Formula: see text]]O3 (PZT) films have been developed from a novel sol–gel route. The sol–gel films were deposited by spin coating method. Isopropanol-based solution was used for its less toxic property. Gold (Au), platinum (Pt) and indium tin oxide (ITO) were used as substrates. Homogeneous polycrystalline films with (110) preferred orientation were obtained from all the films. The films behaved as ferroelectric material where dielectric constant at 0[Formula: see text]V for the films obtained from Au, Pt and ITO substrates were 484, 770 and 655, respectively. The coercive field values were around 10–15[Formula: see text]KV/cm which revealed that the films were soft ferroelectric.

Modeling and Characterization of the Effects of Field Gradients on the Behavior of Ferroelectrics With Interdigitated Electrodes

2013 ◽  
Author(s):  
David M. Pisani ◽  
John A. Gallagher ◽  
Benjamin Smith-Stewart ◽  
Christopher S. Lynch
Keyword(s):  
Micromechanical Model ◽  
Hysteresis Loops ◽  
Local Stress ◽  
Ferroelectric Material ◽  
Dielectric Losses ◽  
Material Loss ◽  
Interdigitated Electrodes ◽  
Field Gradients ◽  
Minor Hysteresis Loops

Macro fiber composites (MFCs) are used in applications ranging from sensing and actuation to energy harvesting and piezoelectric damping. MFCs are comprised of interdigitated electrodes (IDEs) on ferroelectric fibers that result in anisotropic in plane sensing and actuation capability. Minor hysteresis loops were measured for a MFC and the area within the minor hysteresis loops was used to assess material loss under unipolar cyclic loading. A separate set of minor hysteresis loops was run on a fully electroded plate of the same material to determine the material loss when the electric field was uniform. The MFC displayed considerably more material loss than the uniformly loaded plate. A micromechanical model implemented in a finite element code was used to model the effect of inhomogeneous fields, local stress, and polarization reorientation on the dielectric losses. The results indicate that the development of local stress in the ferroelectric material beneath the inerdigitated electrodes results in ferroelastic polarization reorientation that contributes to dielectric losses.

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