Dielectric and ferroelectric properties of Al2O3 containing lead titanate based glass-ceramics

2014 ◽  
Author(s):  
V. U. Rahangdale ◽  
D. K. Gala ◽  
R. M. Acharya ◽  
V. K. Deshpande
Keyword(s):  
Lead Titanate ◽  
Ferroelectric Properties ◽  
Glass Ceramics

Effect of Excess Lead on Dielectric and Ferroelectric Properties of Alkoxide-Derived Lead Titanate Thin Films

2002 ◽  
Vol 271 (1) ◽  
pp. 309-314
Author(s):  
T. Ohno ◽  
H. Suzuki ◽  
J. Takahashi ◽  
S. Shimada ◽  
T. Ota ◽  
...  
Keyword(s):  
Thin Films ◽  
Lead Titanate ◽  
Ferroelectric Properties ◽  
Excess Lead

Lead Titanate Glass-Ceramics

1969 ◽  
Vol 52 (4) ◽  
pp. 230-231 ◽  
Author(s):  
D. G. GROSSMAN ◽  
J. O. ISARD
Keyword(s):  
Lead Titanate ◽  
Glass Ceramics

scholarly journals Preparation, Structural, Electrical, and Ferroelectric Properties of Lead Niobate–Lead Zirconate–Lead Titanate Ternary System

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
Rashmi Gupta ◽  
Seema Verma ◽  
Vishal Singh ◽  
K. K. Bamzai
Keyword(s):  
Dielectric Constant ◽  
Ternary System ◽  
Lead Titanate ◽  
Ac Conductivity ◽  
Perovskite Phase ◽  
Ferroelectric Properties ◽  
Ternary Systems ◽  
Lead Zirconate ◽  
X Ray ◽  
Dispersive Nature

A ternary system of lead niobate–lead zirconate–lead titanate with composition xPN–yPZ–(x-y)PT where x=0.5 and y=0.15, 0.25, and 0.35 known as PNZT has been prepared by conventional mixed oxide route at a temperature of 1100°C. The formation of the perovskite phase was established by X-ray diffraction analysis. The surface morphology studied by scanning electron microscopy shows the formation of fairly dense grains and elemental composition was confirmed by energy dispersive X-ray analysis. Dielectric properties like dielectric constant and dielectric loss (ε′ and tan⁡δ) indicate poly-dispersive nature of the material. The temperature dependent dielectric constant (ε′) curve indicates relaxor behaviour with two dielectric anomalies. The poly-dispersive nature of the material was analysed by Cole-Cole plots. The activation energy follows the Arrhenius law and is found to decrease with increasing frequency for each composition. The frequency dependence of ac conductivity follows the universal power law. The ac conductivity analysis suggests that hopping of charge carriers among the localized sites is responsible for electrical conduction. The ferroelectric studies reveal that these ternary systems are soft ferroelectric.

Crystal Clamping in Lead Titanate Glass-Ceramics

1984 ◽  
Vol 67 (6) ◽  
pp. 424-427 ◽  
Author(s):  
S. M. LYNCH ◽  
J. E. SHELBY
Keyword(s):  
Lead Titanate ◽  
Glass Ceramics

X-ray powder diffraction refinement of PbTi(1−x)FexO(3−δ) solid solution series

2013 ◽  
Vol 28 (4) ◽  
pp. 254-261 ◽  
Author(s):  
Hasitha Ganegoda ◽  
James A. Kaduk ◽  
Carlo U. Segre
Keyword(s):  
Powder Diffraction ◽  
Lead Titanate ◽  
Structural Changes ◽  
Rietveld Method ◽  
Ferroelectric Properties ◽  
Sol Gel ◽  
Solubility Limit ◽  
Homogeneous Distribution ◽  
Cubic Phase ◽  
Cell Parameters

A series of iron-doped lead titanate PbTi(1−x)FexO(3−δ) samples in the x = 0–1 composition range was prepared using sol–gel synthesis at a calcination temperature of 700 °C. The room temperature CuKα powder diffraction data collected from x = 0, 0.005, 0.01, 0.025, 0.05, 0.075, 0.1, 0.125, 0.15, 0.175, 0.2, and 0.3 samples were analyzed using the Rietveld method. Magnetoplumbite (PbFe12O19) secondary phase formation was observed at compositions x = 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, and 1. Fe-composition dependent decrease of tetragonal distortion has been observed. According to Vegard's law, the B-site iron solubility limit in the lead titanate host was found to be approximately 10 mol% (x = 0.1). Homogeneous distribution of dopants below the solubility limit was evidenced by the linear behavior of unit-cell parameters. The absence of a cubic phase and the persistence of distorted oxygen octahedra indicated the existence of ferroelectric properties even at the x = 0.3 composition. Beyond x = 0.3, the P4mm tetragonal model was determined to be invalid possibly because of oxygen defect driven structural changes, mainly tilting Fe-polyhedra.

Dielectric and I-V Characteristic of Lead Titanate Thin Films Prepared on ITO Glass Substrate

2015 ◽  
Vol 1109 ◽  
pp. 461-465 ◽  
Author(s):  
Nurbaya Zainal ◽  
Mohd Hafiz Wahid ◽  
Mohammad Rusop
Keyword(s):  
Thin Films ◽  
Lead Titanate ◽  
High Performance ◽  
Annealing Temperature ◽  
Low Cost ◽  
Ferroelectric Properties ◽  
Sol Gel ◽  
Soda Lime ◽  
Soda Lime Glass ◽  
Ito Glass

Performance of lead titanate, (PbTiO3) thin films have been successfully investigated on microstructural properties, I-V characteristic, dielectric properties, and ferroelectric properties. PbTiO3offers variety of application as transducer, ferroelectric random access memory, transistor, high performance capacitor, sensor, and many more due to its ferroelectric behavior. Preparation of the films are often discussed in order to improve the structural properties, like existence of grain boundaries, particle uniformity, presents of microcrack films, porosities, and many more. Yet, researchers still prepare PbTiO3thin films at high crystallization temperature, certainly above than 600 ̊C to obtain single crystal perovskite structure that would be the reason to gain high spontaneous polarization behavior. Although this will results to high dielectric constant value, the chances that leads to high leakage current is a major failure in device performance. Thus, preparation the thin films at low annealing temperature quite an essential study which is more preferable deposited on low-cost soda lime glass. The study focuses on low annealing temperature of PbTiO3thin films through sol-gel spin coating method and undergo for dielectric and I-V measurements.

Combined effect of grain size and tensile stresses on the ferroelectric properties of sol-gel (Pb,La)TiO3 thin films

1999 ◽  
Vol 14 (12) ◽  
pp. 4570-4580 ◽  
Author(s):  
M. Alguerá ◽  
M. L. Calzada ◽  
L. Pardo ◽  
E. Snoeck
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Grain Size ◽  
Lead Titanate ◽  
Ferroelectric Properties ◽  
Sol Gel ◽  
Precursor Solution ◽  
Grain Size Effect ◽  
Transmission Electron ◽  
Switchable Polarization

Transmission electron microscopy has shown that the grain size of sol-gel-prepared lanthanum-modified lead titanate films increases from ∼100 to ∼1 μm when the excess of PbO in the precursor solution is reduced from 20 to 10 mol%. Switchable polarization is higher in the films with a smaller grain size. Profilometry and the temperature dependence of the dielectric permittivity indicate that films are tensile stressed by the substrate. The grain-size effect on polarization switching is explainedby taking into account this tensile stress, which is thought to induce some a-domain orientation and 90° domain wall clamping in the grains attached to the substrate.

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