Results 181 to 190 of about 4,006 (229)

Flexoelectricity of barium titanate

Applied Physics Letters, 2006
Flexoelectricity was investigated as a function of temperature in paraelectric and ferroelectric phases of barium titanate ceramic. The flexoelectric coefficient μ12 was measured dynamically at small level of strain gradients. μ12 is around 5μC∕m in orthorhombic phase, rises to about 10μC∕m at room temperature, and peaks at ∼50μC∕m near tetragonal ...
Wenhui Ma, L. Eric Cross
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Sputtered Barium Titanate, Lead Zirconate Titanate, Barium Strontium Titanate Films for Capacitor Applications

SAE Technical Paper Series, 2000
<div class="htmlview paragraph">Thin barium titanate(BT), lead zirconate titanate(PZT), barium strontium titanate(BST) films are being developed for use in microelectronics, electromechanical and optoelectronic applications. Thin BaTiO₃, Pb(ZrTi)O₃ and (BaSr)TiO₃ film capacitor ...
Bang-Hung Tsao, Sandra Fries Carr, Susan Heidger, Joseph A. Weimer   +3 more
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Electrorheological effects in carbon, barium titanate, and nickel coated with barium titanate suspensions

Journal of Molecular Liquids, 2001
Abstract Effects of the electric field on the rheology, electrorheological (ER) effects, are investigated on carbon, barium titanate (BaTiO 3 ) and BaTiO 3 -coated nickel (BT-Ni) suspensions. Among some electroreological properties, electric field frequency dependence of the induced shear stress (yield stress) observed for three suspensions shows a ...
Yasuhito Misono, Takashi Yamaguchi, Keishi Negita   +2 more
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The Lorentz Correction in Barium Titanate

Physical Review, 1950
It is assumed, following Devonshire, that the ferroelectric behavior of BaTi${\mathrm{O}}_{3}$ arises because of the Lorentz correction, leading to a vanishing term in the denominator of the expression for dielectric constant. If the polarizability varies slowly with temperature, the temperature variation of dielectric constant follows.
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Fabrication and characterization of Barium Titanate nanofibers

10th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, 2015
In this paper, a rotational disk based electrospinning method for making Barium Titanate (BTO) nanofibers was presented. A silicon wafer coated with a 50 nm MgO barrier layer was attached to a motor mounted disk. BTO nanofibers were collected on the spinning silicon wafer. By using this method, partially aligned BTO nanofibers were obtained.
Liang Zhou, Guitao Zhang, Richard Galos, Yong Shi   +3 more
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The Crystal Structure of Hexagonal Barium Titanate

The Journal of Chemical Physics, 1948
The crystal structure of hexagonal barium titanate has been determined by X-ray methods. The unit cell, which contains six units of BaTiO3, has a0 = 5.735 A. and c0 = 14.05 A. In the space group C63/mmc all the ions occur at special positions: 2 Ba at (b), 4 Ba at (f), 2 Ti at (a), 4 Ti at (f), 6 O at (h), and 12 O at (k).
R. D. Burbank, H. T. Evans
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Photoinduced absorption in photorefractive barium titanate

Optics Letters, 1989
The photorefractive properties of barium titanate are influenced by the presence of secondary photorefractive centers. The consequence is an intensity-dependent photorefractive effort due to changes in the effective empty trap concentration. Information about these centers can be obtained by studying the photo-induced absorption.
G A, Brost, R A, Motes
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Barium Titanate (BaTiO3)

1997
Publisher Summary It is noted that the barium titanate (BaTiO3) crystal is ferroelectric at room temperature. The crystal structure is perovskite, cubic above the Curie temperature, and tetragonal below the Curie temperature. At room temperature, the a axis is longer than the a axis by 1%.
Chuen Wong, Ye Yung Teng, J. Ashok, P.L.H. Varaprasad   +3 more
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Lattice dynamics of pure barium titanate and barium strontium titanate solid solutions

Journal of Physics C: Solid State Physics, 1984
The lattice dynamics of cubic BaTiO3 and Ba0.8Sr0.2TiO3 has been extensively investigated by inelastic neutron scattering using various triple-axis spectrometers. Measurements were carried out to obtain dispersion curves in the Gamma M, Gamma R and Gamma X directions of the Brillouin zone. A rigid-shell model has been developed for the pure BaTiO3, and
B Jannot, C Escribe-Filippini, J Bouillot   +2 more
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Semiconducting barium titanate

Journal of Materials Science, 1971
Barium titanate, which is well known as a basic ferroelectric material, is also of interest when doped because of the interaction between semiconductivity and ferroelectricity. The resistance of blocking layers at surfaces and grain-boundaries is governed mainly by the ferroelectric properties, so that a resistance jump of four decades is observed on ...
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