Results 191 to 200 of about 4,084 (247)
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Curie Point of Barium Titanate
Nature, 1947The Curie point, that is, the transition temperature between the ferro-electric and the non-ferro-electric structures of barium metatitanate, BaTiO3, is characterized by a marked peak in the permittivity v. temperature curve and has recently received much attention, though reported values1–4 for the temperatures of maximum permittivity show in some ...
M G, HARWOOD, P, POPPER, D F, RUSHMAN
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Sputtered barium titanate and barium strontium titanate films for capacitor applications
ISAF 2000. Proceedings of the 2000 12th IEEE International Symposium on Applications of Ferroelectrics (IEEE Cat. No.00CH37076), 2002Thin barium titanate and barium strontium titanate films are being developed as dielectric film for use in dc-dc converters. Thin BaTiO/sub 3/ (BT) and (BaSr)TiO/sub 3/ (BST) film capacitor devices were fabricated using RF magnetron sputtering techniques. The typical dielectric constant of these film capacitors was in the range of 300 to 690.
null Bang-Hung Tsao +2 more
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Multiferroic ceramics based on barium titanate and barium ferrite
Ferroelectrics, 2020MULTIFERROIC CERAMICS BASED ON BARIUM TITANATE AND BARIUM FERRITE Malyshkina1 O.V., Shishkov1 Gr.S., Ivanova1 A.I., Malyshkin1 Y.A., Alexina2 Yu.A. 1Tver state University, Tver, Russia, Olga.Malyshkinamail.ru 2 Lomonosov Moscow State University, Moscow, Russia Samples of ceramics based on barium ferrite (BaFe) and barium titanate (BaTiO3) were obtained
Malyshkina, O.V. +4 more
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The Lorentz Correction in Barium Titanate
Physical Review, 1950It 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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Flexoelectricity of barium titanate
Applied Physics Letters, 2006Flexoelectricity 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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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 BaTiO<sub>3</sub>, Pb(ZrTi)O<sub>3</sub> and (BaSr)TiO<sub>3</sub> film capacitor ...
Bang-Hung Tsao +3 more
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<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 BaTiO<sub>3</sub>, Pb(ZrTi)O<sub>3</sub> and (BaSr)TiO<sub>3</sub> film capacitor ...
Bang-Hung Tsao +3 more
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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 +2 more
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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 +2 more
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The Crystal Structure of Hexagonal Barium Titanate
The Journal of Chemical Physics, 1948The 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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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 +3 more
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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 +3 more
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Photoinduced absorption in photorefractive barium titanate
Optics Letters, 1989The 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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