Results 31 to 40 of about 70,379 (187)
Dielectric and ferroelectric characteristics of Ba(Ti0.25Zr0.25Hf0.25Sn0.25)O3 high-entropy ceramics
Journal of Materiomics, 2023 Ba(Ti0.25Zr0.25Hf0.25Sn0.25)O3 high-entropy ceramics were prepared by a standard solid state reaction process, and the dielectric and ferroelectric characteristics were investigated together with the structures.
Rui Hu Mi +3 more
doaj +1 more source
BS0.5BNT-based relaxor ferroelectric ceramic/glass–ceramic composites for energy storage
Journal of Advanced Ceramics, 2023 Relaxor ferroelectric ceramics have very high dielectric constant (εr) but relatively low electrical breakdown strength (Eb), while glass–ceramics exhibit higher Eb due to the more uniformly dispersed amorphous phases and submicrocrystals/nanocrystals ...
Xuhai Shi +10 more
doaj +1 more source
Role of matrix phase and electric field gradient in Na1/2Bi1/2TiO3BaTiO3:ZnO composites
Journal of Materiomics, 2022 Na1/2Bi1/2TiO3-based materials exhibit potential for applications in high-power ultrasonics. The composites of Na1/2Bi1/2TiO3-yBaTiO3 (NBTyBT; y denotes mole%) with ZnO inclusions were demonstrated to stabilize a ferroelectric equilibrium that led to ...
Lalitha Kodumudi Venkataraman +2 more
doaj +1 more source
Relaxor Behaviour in Ferroelectric Ceramics [PDF]
, 2012 The chapter shows the studies carried out on several relaxor ferroelectric ceramic materials, which have been developed by the present authors. Lanthanum modified lead zirconatetitanate ceramics will be evaluated considering different La3+ concentrations and Zr/Ti ratios.
Peláiz Barranco, Aimé +3 more
openaire +3 more sources
Dynamics of relaxor ferroelectrics [PDF]
Physical Review B, 2001 We study a dynamic model of relaxor ferroelectrics based on the spherical random-bond---random-field model and the Langevin equations of motion. The solution to these equations is obtained in the long-time limit where the system reaches an equilibrium state in the presence of random local electric fields.
Pirc, R., Blinc, R., Bobnar, V.
openaire +2 more sources
Structure factor of a relaxor ferroelectric
Physical Review B, 2015 We study a minimal model for a relaxor ferroelectric including dipolar interactions, and short-range harmonic and anharmonic forces for the critical modes as in the theory of pure ferroelectrics together with quenched disorder coupled linearly to the critical modes.
Guzmán Verri, Gian Giacomo +1 more
openaire +5 more sources
Ferroelectricity and Self-Polarization in Ultrathin Relaxor Ferroelectric Films [PDF]
Scientific Reports, 2016 AbstractWe report ferroelectricity and self-polarization in the (001) oriented ultrathin relaxor ferroelectric PMN-PT films grown on Nb-SrTiO3, SrRuO3 and La0.7Sr0.3MnO3, respectively. Resistance-voltage measurements and AC impedance analysis suggest that at high temperatures Schottky depletion width in a 4 nm thick PMN-PT film deposited on Nb-SrTiO3 ...
Peixian Miao +9 more
openaire +2 more sources
Origin of the enhanced flexoelectricity of relaxor ferroelectrics [PDF]
Applied Physics Letters, 2014 We have measured the bending-induced polarization of Pb(Mg1/3Nb2/3)O3-PbTiO3 single crystals with compositions at the relaxor-ferroelectric phase boundary. The crystals display flexocoupling coefficients f > 100 V, an order of magnitude bigger than the theoretical upper limit set by the theories of Kogan and Tagantsev.
Jackeline Narvaez, Gustau Catalan
openaire +3 more sources
High Entropy Oxide Relaxor Ferroelectrics
ACS Applied Materials & Interfaces, 2022 Relaxor ferrolectrics are important in technological applications due to a strong electromechanical response, energy storage capacity, electrocaloric effect, and pyroelectric energy conversion properties. Current efforts to discover and design new materials in this class generally rely on substitutional doping of known ferroelectrics, as slight changes
Yogesh Sharma +15 more
openaire +3 more sources
Relaxations and Relaxor-Ferroelectric-Like Response of Nanotubularly Confined Poly(vinylidene fluoride) [PDF]
, 2017 Herein, we elucidate the impact of tubular confinement on the structure and relaxation behavior of poly(vinylidene difluoride) (PVDF) and how these affect the para-/ferroelectric behavior of this polymer.
Cavallaro A
core +2 more sources