Results 301 to 310 of about 288,433 (353)

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 ...
R. A. Cowley, Sergey Lushnikov, G.-M. Rotaru, B. Roessli, S. N. Gvasaliya   +4 more
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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. Masuzawa, Hideki Takeuchi, C. Nakaya, Y. Ito   +3 more
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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.
J. Fielding, T.R. Shrout
openaire   +2 more sources

Large Electrocaloric Effect in (Bi0.5Na0.5)TiO3-Based Relaxor Ferroelectrics.

ACS Applied Materials and Interfaces, 2020
Electrocaloric effect (ECE) is significantly critical for environment-friendly cooling technologies to replace vapor-compression-based refrigeration. Lead-free bismuth sodium titanate-based ferroelectrics have attracted considerable attention because of ...
Ling Zhang, Chunlin Zhao, Ting Zheng, Jiagang Wu   +3 more
semanticscholar   +1 more source

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 ...
Kailiang Ren, Qiming Zhang, Baojin Chu, Robert J. Klein, Xi Zhang, James Runt, Shihai Zhang, Shihai Zhang   +7 more
openaire   +2 more sources

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.
Qiming Zhang, Zhongyang Cheng, Xing-Zhong Zhao, Vivek Bharti   +3 more
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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.
openaire   +2 more sources

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 ...
Herschel Rabitz, B. E. Vugmeister
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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.
Qiming Zhang, Cheng Huang, Vid Bobnar, Feng Xia, F. Bauer, Adrijan Levstik, Shihai Zhang, Zhongyang Cheng, Robert J. Klein   +8 more
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Relaxor ferroelectrics and related superglasses

Ferroelectrics, 2019
AbstractMesoscopic ferroic glasses such as martensitic strain glass Ti50−x Ni50+x, magnetic cluster glass La0.7Ca0.3Mn0.7Cd0.3O3, and superdipolar relaxor PbMg1/3Nb2/3O3 (PMN) undergo glass transit...
Kleemann, Wolfgang, Dec, Jan
openaire   +3 more sources