Search results for "Ferroelectric ceramics"

showing 10 items of 28 documents

EoP250. Recent advances in transparent ferroelectric ceramics research and applications

1992

Abstract The studies of field-induced lattice rearrangement and field-induced phase transition (PT), laser beam effects in transparent ferroelectric ceramics (TFC), dopant and radiation effects in PLZT, Kerr effect demonstration and application of an intracavity matrix-addressed spatial-time modulator are discussed.

Phase transitionMaterials scienceKerr effectDopantbusiness.industryFerroelectric ceramicsPhysics::OpticsRadiationCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsCondensed Matter::Materials ScienceOpticsLattice (order)OptoelectronicsbusinessLaser beamsFerroelectrics
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Bias Field Effect on Dielectric Response in the Region of Phase Transitions in (Pb,La)(Zr,Sn,Ti)O3Ceramics

2007

The dielectric response of (Pb 0.97 La 0.02 ) (Zr 0.53 Ti 0.12 Sn 0.35 )O 3 (PLZTS-2/53/12/35) ceramics was measured as a function of DC bias field E =. As the bias field intensity increases the values of ϵ′ max and ϵ” max are found to shift towards a lower temperature. A possible coexistence of the ferroelectric and antiferroelectric phases over a wide range of temperatures in the PLZTS-2/53/12/35 samples is assumed to explain the observed features of ϵ′ (T), ϵ” (T), and ϵ′ (E=) curves.

PermittivityPhase transitionMaterials scienceFerroelectric ceramicsAnalytical chemistryBiasingCondensed Matter PhysicsFerroelectricityTitanateElectronic Optical and Magnetic MaterialsNuclear magnetic resonancevisual_artvisual_art.visual_art_mediumAntiferroelectricityCeramicFerroelectrics
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Dependence of dielectric permittivity on bias field in Pb1−xBaxSc0.5Nb0.5O3

2001

Abstract Bias field effect on the dielectric permittivity is studied in Badoped lead scandium niobate ferroelectric ceramics (PBSN-x) prepared by conventional technology. Results of this work allow to analyse the mechanism of possible formation and motion of domain and/or phase boundaries in the explored ferroelectric ceramics.

PermittivityMaterials scienceCondensed matter physicsFerroelectric ceramicschemistry.chemical_elementRelative permittivityBiasingCondensed Matter PhysicsFerroelectricityElectronic Optical and Magnetic MaterialschemistryPhase (matter)ScandiumSolid solutionFerroelectrics
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Production and Properties of Lead Scandoniobate Ferroelectric Ceramics Doped with Rare-Earth Oxides

2001

Materials scienceMechanical EngineeringFerroelectric ceramicsDopingMetallurgyRare earthMineralogySinteringlaw.inventionLead (geology)Mechanics of MaterialslawGeneral Materials ScienceCalcinationKey Engineering Materials
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Production and properties of doped PSN electro-optical ceramics

1997

Due to multifunctionality the transparent ferroelectric ceramics is attractive to solid state chemistry and physics as a promising material for active electro-optic elements. To study doping effects on the technological processing and properties, ceramic samples of Pb1-xZxSc1/2Nb1/2O3, have been prepared, where Z: (1) Ba (0 less than or equal to x less than or equal to 1), (2) rare-earth elements: Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu (x equals 0.1), (3) PbSc1/2Nb1/2O3 doped with 5 wt.% of rare-earth oxides. Ceramic characteristics, dielectric and electro-optical parameters have been measured. Differential thermal analysis (DTA), and x-ray diffraction are used to study the infl…

Solid-state chemistryMaterials scienceFerroelectric ceramicsDopingOxideAnalytical chemistryMineralogyDielectricchemistry.chemical_compoundchemistryDifferential thermal analysisvisual_artX-ray crystallographyvisual_art.visual_art_mediumCeramicSPIE Proceedings
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Compositional and Optical Gradient in Films of PbZrxTi1-xO3 (PZT) Family

2011

Pb(ZrxTi1-x)O3 (PZT) (x = 0-1) films have attracted the attention of researchers for the past 30 years due to their excellent ferroelectric (FE) and electromechanical properties, which have led to the commercialization of thin PZT films for ferroelectric random access memory (FeRAM), forming a market of several millions USD annually. Ferroelectricity of perovskite oxide thin films, especially PZT thin films, can be exploited in semiconductor devices to achieve non-volatile random access memory (NVRAM) with high-speed access and long endurance, which can overcome the barriers, encountered in current semiconductor memory technologies. The ferroelectricity can be also exploited to voltage depe…

Microelectromechanical systemsMaterials sciencebusiness.industryFerroelectric ceramicsFerroelectric RAMOptoelectronicsSemiconductor memorySemiconductor deviceThin filmbusinessFerroelectricityPyroelectricity
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Features of Phase Diagrams of Binary Pb(B<sub>1/2</sub>Nb<sub>1/2</sub>)O<sub>3</sub>-PbTiO<sub>3</sub&g…

2001

Materials scienceCondensed matter physicsMechanics of MaterialsMechanical EngineeringPhase (matter)Ferroelectric ceramicsBinary numberGeneral Materials ScienceCoercivityPhase diagramKey Engineering Materials
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Dielectric spectra of electron-irradiated PSN ceramics

1997

The influence of electron-irradiation on the dielectric properties of transparent PSN ferroelectric ceramics is studied by low (LF) and infralow (ILF) frequency spectrum analysis. Redistribution of relaxation frequencies caused by electron-irradiation has been discovered and is related to pinning impacts of the radiation-induced defects.

Materials scienceCondensed matter physicsSolid-state physicsFerroelectric ceramicschemistry.chemical_elementDielectricElectronElectroluminescenceThuliumNuclear magnetic resonancechemistryvisual_artvisual_art.visual_art_mediumIrradiationCeramicSPIE Proceedings
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Polar nanodomains and local ferroelectric phenomena in relaxor lead lanthanum zirconate titanate ceramics

2005

Transparent Pb0.9125La0.0975(Zr0.65Ti0.35)0.976O3 ceramics (conventionally abbreviated as PLZT 9.75/65/35) is a typical relaxor characterized by the absence of the ferroelectric order at the macroscopic scale. In this letter, we report on the observation of complex polar structures on the surface of this material via piezoresponse force microscopy (PFM). The irregular polarization patterns are associated with the formation of a glassy state, where random electric fields destroy the long-range ferroelectric order. The measure of the disorder, the correlation length of ∼50nm, was directly deduced from the PFM images. Local poling of relaxor ceramics resulted in the formation of a stable micro…

Phase transitionMaterials sciencePhysics and Astronomy (miscellaneous)Condensed matter physicsFerroelectric ceramicsPolingNanotechnologyDielectricFerroelectricityTitanatePiezoresponse force microscopyvisual_artvisual_art.visual_art_mediumCeramicApplied Physics Letters
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Heat Capacity and Dielectric Properties of the PNN-PT Ferroelectric Ceramics

2012

A study of dielectric permittivity and heat capacity of the (1-х)PbNi1/3Nb2/3O3 – хPbTiO3 solid solution system (x = 0.3, 0.4, 0.5) within the 290–700 K range is reported. Temperatures of phase transitions Tm determined from maximums of dielectric permittivity ϵ depends on the content of PbTiO3. A broad phase transition is shown to proceed in the 0.7PbNi1/3Nb2/3O3–0.3PbTiO3 composition around 312 K. Specific to phase transitions anomalous heat capacity is observed at Т ≈ 520 K in all compositions studied.

Range (particle radiation)Phase transitionMaterials scienceCondensed matter physicsFerroelectric ceramicsDielectric permittivityThermodynamicsRelative permittivityDielectricCondensed Matter PhysicsHeat capacityElectronic Optical and Magnetic MaterialsSolid solutionFerroelectrics
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