Results 241 to 250 of about 429,377 (286)

Hysteresis in dielectric electroactive polymers

SPIE Proceedings, 2009
In this paper experimental results indicating the presents of hysteresis in the acrylic tape VHB 4910 produced by 3M are presented. It is shown that there are large stress relaxation times associated with this material making it difficult to separate viscoelastic effects and hysteresis.
Lassen, Benny, Jaffari, Masood, Melvad, Claus, Kristjánsdóttir, Gisla Run, Jones, Richard   +4 more
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Dielectric hysteresis in some polyamides

Proceedings of 8th International Symposium on Electrets (ISE 8), 2002
In view of the electric displacement D-the electric field E hysteresis or the polarization reversal in less crystalline polyamides derived from m-xylylenediamine we have investigated the ferroelectric nature in other types of polyamide. In this work samples employed were polyamides prepared from 1,3-bis(aminomethyl)cyclohexane (BAC) and dicarboxylic ...
Y. Murata, K. Tsunashima, N. Koizumi
openaire   +1 more source

Hysteresis loops in dielectric amplifiers

Transactions of the American Institute of Electrical Engineers, Part I: Communication and Electronics, 1956
DIELECTRIC amplifiers are circuits which utilize the nonlinear characteristics of capacitors made with so-called ferroelectric materials as dielectrics. To predict the performance of a dielectric amplifier, the behavior of the nonlinear capacitor must be determined and some means of representing it analytically must be devised.
Earl Wingrove, Louis Depian, W. Lee Shevel   +2 more
openaire   +1 more source

Contact angle hysteresis in electrowetting on dielectric

Chinese Physics B, 2015
Contact angle hysteresis (CAH) is one of the significant physical phenomena in electrowetting on dielectric (EWOD). In this work, a theoretical model is proposed to characterize electrowetting evolution on substrates with CAH, and the relationship among apparent contact angle, potential, and some other parameters is quantified.
Rui Zhao, Qi-Chao Liu, Ping Wang, Zhong-Cheng Liang   +3 more
openaire   +1 more source

Dielectric hysteresis measurement in lossy ferroelectrics

Ferroelectrics, 1999
Abstract The conventional Sawyer-Tower circuit is modified so as to employ a quasi-DC electric-field rather than the 60Hz AC electric-field. By using this modified Sawyer-Tower method, the P-E hysteresis loop can be determined using 1 cycle of electric field.
Jae-Hwan Park, Byung-Kook Kim, Jae-Gwan Park, In-Tae Kim, Hae-June Je, Yoonho Klm, Soon Ja Park   +6 more
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Electromechanical hysteresis and coexistent states in dielectric elastomers

Physical Review B, 2007
When a voltage is applied to a layer of a dielectric elastomer, the layer reduces in thickness and expands in area. A recent experiment has shown that the homogeneous deformation of the layer can be unstable, giving way to an inhomogeneous deformation, such that regions of two kinds coexist in the layer, one being flat and the other wrinkled.
Xuanhe Zhao, Wei Hong, Zhigang Suo
openaire   +1 more source

Dielectric Hysteresis at Low Frequencies

Proceedings of the Physical Society of London, 1911
The Paper is an attempt to determine from dielectric hysteresis loops the nature of the change of polarisation which gives rise to the absorption of energy. Current and voltage wave-forms in large condensers were oscillographically recorded at a frequency of 36 a second.
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Dielectric hysteresis loops dispersion in TGS crystals

Ferroelectrics, 1998
The frequency dependencies of coercive field and polarization of TGS in wide frequency (10-1-104Hz) and temperature (280-330 K) ranges were observed.
B. N. Prasolov, M. Y. Palagin, V. V. Gorbatenko   +2 more
openaire   +1 more source

Dielectric Hysteresis Loops of First-Order Antiferroelectrics

Ferroelectrics, 2007
Landau-Devonshire free-energy expression is applied to study the dielectric hysteresis loops of a two-sublattice antiferroelectric undergoing a first order phase transition from the paraelectric phase. This expression for the antiferroelectric sublattices corresponds to the free energy expression of ferroelectric bilayers of equal thicknesses.
Lye-Hock Ong, Junaidah Osman, D. R. Tilley   +2 more
openaire   +1 more source

Influence of Dielectric Stiffness, Interface, and Layer Thickness on Hysteresis Loops of Ferroelectric Superlattices [PDF]

Journal of Applied Physics, 2011
We examined the influence of dielectric stiffness, interface, and layer thickness on the hysteresis loops, including the remanent polarization and coercive field of a superlattice comprising alternate layers of ferroelectric and dielectric, using the ...
Makoto Iwata, K -H Chew
exaly   +4 more sources