Results 141 to 150 of about 70,379 (187)

New Ferroelectric and Relaxor Ceramics in the Mixed Oxide System NaNbO3–BaSnO3

Solid State Sciences, 2004
New ferroelectric or relaxor ceramics were elaborated in the system Ba1−xNaxSn1−xNbxO3 (BSNN) by solid-state reaction technique..
Abdelhédi Aydı, Chokri BOUDAYA, Hamadi Khemakhem   +2 more
exaly   +2 more sources

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Lead‐Free Relaxor Ferroelectrics

Journal of the American Ceramic Society, 2011
Feature size is a natural determinant of material properties. Its design offers the technological perspectives for material improvement. Grain size, crystallite size, domain width, and structural defects of different nature constitute the classical design elements.
Shvartsman, Vladimir, Lupascu, Doru C.
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Optical Properties of Relaxor Ferroelectrics

Ferroelectrics, 2004
The optical absorption spectrum, luminescent emission and photoconductivity were investigated in single crystal PbMg1/3Nb2/3O3 and in the Pb0.91La0.09(Zr0.65Ti0.35)O3 ceramics in the wide temperature region. The spectrum of the luminescence correlates with spectrum of photoconductivity emission.
Zverev D., Migachev S., Mamin R., Nikitin S., Sadykov M.   +4 more
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Relaxing with relaxors: a review of relaxor ferroelectrics

Advances in Physics, 2011
Relaxor ferroelectrics were discovered in the 1950s but many of their properties are not understood. In this review, we shall concentrate on materials such as PMN (PbMg1/3Nb2/3O3), which crystallize in the cubic perovskite structure but with the Mg ion, charge 2+, and the Nb ion, charge 5+, randomly distributed over the B site of the perovskite ...
Cowley, R.A., Gvasaliya, S.N., Lushnikov, S.G., Roessli, B., Rotaru, G.M.   +4 more
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Normal ferroelectric to ferroelectric relaxor conversion in fluorinated polymers and the relaxor dynamics

Journal of Materials Science, 2006
To elucidate the molecular origin of the polarization dynamics in the ferroelectric relaxor poly(vinylidene fluoride—trifluoroethylene-chlorofluoroethylene) (P(VDF-TrFE-CFE)) terpolymer, a broadband dielectric study was carried out in the frequency range from 0.01 Hz to 10 MHz and temperatures from −150?C to 120?C for the terpolymer and a normal ...
Shihai Zhang, Rob J. Klein, Kailiang Ren, Baojin Chu, Xi Zhang, James Runt, Q. M. Zhang   +6 more
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Relaxor ferroelectric polymers

ISAF 1998. Proceedings of the Eleventh IEEE International Symposium on Applications of Ferroelectrics (Cat. No.98CH36245), 2002
An exceptionally high electrostrictive response was observed in electron irradiated polyvinylidene fluoride-trifluoroethylene (P(VDF-TrFE)) copolymer. Moreover, the transverse strain of the material can be tuned over a large range by different sample treatment conditions.
Q.M. Zhang, V. Bharti, Z.-Y. Cheng, null Xing-Zhong Zhao   +3 more
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A phenomenology of relaxor ferroelectrics

Ferroelectrics, 1997
Abstract We propose a phenomenological theory for the dielectric properties of relaxor ferroelectrics based on the assumption that the polar clusters distributed in highly polarizable host lattice are responsible for the relaxor behavior. Two major differences between relaxors ferroelectrics and conventional orderdisorder ferroelectrics have been ...
B. E. Vugmeister, H. Rabitz
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Relaxor ferroelectric materials

IEEE Symposium on Ultrasonics, 2002
The authors review relaxor ferroelectrics and associated phenomena. It is noted that the anomalously large dielectric constants (K) of relaxor ferroelectrics make them ideal for multilayer capacitors, electrostrictive actuators, and E-field-induced piezoelectrics for low-frequency sonar and high-frequency biomedical transducers.
T.R. Shrout, J. Fielding
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Relaxor ferroelectric transducers

IEEE Symposium on Ultrasonics, 2002
Novel ultrasonic transducers whose sensitivity can be controlled with a DC bias field have been developed by utilizing relaxor ferroelectrics as a transducer material in place of conventional piezoelectrics. Relaxor ferroelectrics have a large bias-field-induced piezoelectricity as well as a giant electrostrictive effect due to their extremely large ...
H. Takeuchi, H. Masuzawa, C. Nakaya, Y. Ito   +3 more
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Relaxor Ferroelectric Polymers

Ferroelectrics, 2006
The relaxor ferroelectric polymers, i.e., the poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] based terpolymers and high energy electron irradiated copolymers, provide unique opportunity to investigate the ferroelectric relaxor behavior in polymeric materials.
Shihai Zhang, Cheng Huang, Z. -Y. Cheng, F. Xia, R. Klein, Q. M. Zhang, V. Bobnar, A. Levstik, F. Bauer   +8 more
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