| Titre : | Laser light generation in UV-Vis and near-infrared in Sb2O3 glasses |
| Auteurs : | Sayah Rezgui, Auteur ; Mohamed Toufik Soltani , Directeur de thèse |
| Type de document : | Thése doctorat |
| Editeur : | Biskra [Algérie] : Faculté des Sciences Exactes et des Sciences de la Nature et de la Vie, Université Mohamed Khider, 2025 |
| Format : | 1VOL.(102.p) / ill.couv.ill.en coul / 30cm |
| Langues: | Anglais |
| Langues originales: | Anglais |
| Résumé : |
The design of the glass panel is based on the following principles: It is used to determine the structural, mechanical, and dimensional characteristics of the glass panel. It is employed through the use of building materials and the application of advanced structural analysis and design principles. A valuable vision for glass panel design in specialized applications. The selection of the appropriate glass panel is crucial in the third chapter. The analysis of the strands was confirmed.The strands were analyzed using XRD (X-ray diffraction) and FTIR (FTIR) spectroscopy, with all the strands being non-metallic, non-metallic, Sb³⁺, and Sb⁵⁺ in the strands. N Tabor Sb–O–M Muirabla Diska Lama Omnib, (BaO) send regila reg negisklaa nam daz umm, to support you. Rufsufla Ali Yutala Jajazla (SNP) Qaaf Ekinakim Sasakh), Aftarim Ghanoi Lama E = 70.3 Laksabaji (Lafb Nayb Ataqtamla Tabartala P–O–Sb Tarobla Ali Yutala Jajazla Raha Aminib, (SNB) (Yesrb resident of Wajf Yenda 2.45 Talk about what you need to know about it The results confirm that the phospholipid system in the 3BO region is characterized by a high energy density (SNPb: 0.1724). This is further supported by the fact that the phospholipid system in the phospholipid system reaches a specific level of phospholipid content (SNP: 0.44269). This confirms the relationship between the phospholipid system and the phospholipid system. These results indicate that the phospholipid characteristics are limited to the network connection.This is further confirmed by the role of the phospholipid system in the power of the phospholipid field. . The fourth chapter of the Eu³⁺ and Dy³⁺ can be used to determine the potential for a strong reaction. The presence of a specific type of sulfate in the sulfate is observed, where the SNPE (30% P₂O₅) is used for the optimal reaction. The concentration of SNPE (9.675) is determined based on the specific environmental conditions, where it is considered. The presence of Eu³⁺ in the sulfate is confirmed by the presence of a specific ratio (P₂ = 8.21 × 10⁻² ⁰cm²). The presence of a specific ratio between Eu-O (sulfate-based measurements) is also confirmed. The second phase of the 1.92 alkali non-acidic sulfate (second phase). It is possible to use the combined Dy³⁺ alkali in the SNPDE alkali in the second phase of the sulfuric acid sulfate. The effect is under 374 alkali in the light source, tmuni (CCT = 5434 K), and tmuni in the light source (CCT = 3350 K) at 394 alkuni. The second phase of the sulfali in the sulfuric acid sulfate is TPA, (under the close-range heat source, the sulfuric acid sulfate is 7501100). The current phase is a type of sulfuric acid sulfate. Energy transfer (Eu³⁺) involves the transfer of energy through a process that is both efficient and efficient. This is better. These developments in the production of energy are possible, and the process of transferring energy through the production of ... Noumitnlaa |
| Sommaire : |
List of Abbreviation ………………………………………I ist of Figures…………………………………………………………III List of Tables…………………………………………………………V GeneralIntroduction……………………………………………1 ChapterⅠ:IntroductiontoAntimonyGlassesandRareEarthElements I.1.AntimonyGlasses................8 I.1.1.IntroductiontoAntimony-BasedGlassSystems.........8 I.1.2.StructuralUniquenessofAntimonyGlassNetworks......8 I.1.3.AdvantagesoverTraditionalGlassSystems............9 .1.4.ChemicalandPhysicalProperties....................10 I.1.5.Antimonyglasschallenges.........................11 I.2.RareEarthElements:Dysprosium(Dy³⁺)andEuropium(Eu³⁺).........12 I.2.1.Roleofrare-earthionsinglasssystems........................12 I.2.2.LuminescenceMechanismsofRareEarthIons.....................12 I.2.3.SelectionofDysprosium(Dy³⁺)andEuropium(Eu³⁺)..............13 I.2.4.ApplicationsinWhiteLightEmissionandSpectroscopy...........13 I.3.Europium(Eu³⁺)Doping........................................14 I.3.1.RedLuminescencevia⁵D₀→⁷F₂Transitions......................14 I.3.2.SensitivitytoLocalSymmetry................................14 I.4.Dysprosium(Dy³⁺)Doping......................................14 I.4.1.Yellow/BlueEmissionBands..................................14 I.4.2.ChallengesinAchievingWhiteLightEmission...................15 I.5.Co-dopingwithDy³⁺andEu³⁺....................................15 I.5.1.EnergyTransferDynamics(Dy³⁺→Eu³⁺).........................15 I.5.2.SynergisticEffectsforTunableEmission......................16 I.6.References..................................................17 ChapterⅡ:GlassPreparation,Characterization,andCalculationMethods II.1.Introduction..............................................20 II.2.GlasssamplesPreparation...................................21 II.2.1.PrecursorWeighingandCalcination.........................21 II.2.2.MeltingProcess..........................................23 II.2.3.SampleAnnealing.........................................23 II.2.4.SamplePolishing.........................................24 II.3.CharacterizationTechniques................................24 II.3.1.StructuralAnalysis......................................24 II.3.1.1.XRDdiffractograms.....................................24 II.3.1.2.FTIRspectra...........................................25 II.3.2.ThermalandMechanicalProperties..........................26 II.3.2.1.glasstransitiontemperatureandthermalstability.........26 II.3.2.2.PrincipleofDifferentialScanningCalorimetry(DSC).......26 II.3.2.3.ComponentsoftheDSCThermogram..........................26 II.3.2.4.ThermalStabilityandImplications.......................27 II.3.2.5.Ultrasonicpulse-echoforelasticconstants...............28 II.3.2.6.ElasticConstantCalculations...........................28 II.3.2.7.ExperimentalSetupandValidation........................28 II.3.3.OpticalCharacterization.................................29 II.3.3.1.UV-VisSpectroscopy(AbsorptionEdges,BandgapEstimation).29 II.3.3.2.BandgapEstimationviaDavisandMott'sRelation............29 II.3.3.3.UrbachEnergyandAbsorptionEdgeAnalysis.................30 II.3.3.4.Photoluminescence(Excitation/EmissionSpectra,Lifetime Measurements) II.3.3.5.ExcitationandEmissionMechanisms.......................32 II.3.3.6.Fluorescencevs.PhosphorescenceinLanthanides...........32 II.3.3.7.LifetimeMeasurementsandDecayAnalysis..................33 II.3.4.Judd-OfeltTheory........................................33 II.3.4.1.IntensityParameters(Ω₂,Ω₄,Ω₆):OriginandCalculation....33 II.3.4.2.RadiativeTransitionProbabilities......................34 II.3.5.OpticalBasicityandPolarizability........................36 II.3.5.1.RelationshipandInfluenceonOpticalBandGap..............36 II.3.5.2.OxideIonPolarizability................................36 II.3.5.3.OpticalBasicity.......................................37 II.3.5.4.RelationshipwithOpticalBandGap........................37 I.3.6.CIEChromaticityAnalysis..................................38 II.3.6.1.ColorMatchingFunctionsandtheStandardObserver..........38 II.3.6.2.SpectralPowerDistributioninColorimetry................39 II.3.6.3.ChromaticityCoordinatesandTheirProperties.............39 II.3.6.4.ColorPurityandSaturationMeasurement...................40 II.3.6.5.DominantWavelengthDetermination.......................40 II.3.6.6.CorrelatedColorTemperature............................41 II.4.References................................................42 ChapterⅢ:Structural,optical,andmechanicalpropertiesofantimonybasedglasses III.1.Introduction............................................46 III.2.Structuralproperties....................................47 III.2.1.XRDresults............................................47 III.2.2.FTIRanalysis..........................................48 III.2.2.1.FTIRanalysisofantimonyandsodiumatmonyglasses........48 III.2.2.2.FTIRAnalysisofSodiumPhosphateAntimonyGlass..........50 III.2.3.FTIRanalysisofsodiumborteantimonyglasses..............52 III.2.2.4.FTIRanalysisofsodiumPb,Zn,andBaantimonyglasses......54 III.3.ThermalPropertiesandElasticConstants....................57 III.3.1.Thermalroperties......................................57 III.3.2.ElasticConstants......................................59 III.4.Opticalproperties.......................................61 II.4.1UVVISTransmittanceSpectra...............................61 II.4.2.Urbachenergyandopticalbasicity.........................62 III.4.3.OpticalBandGap,RefractiveIndex,andOxidePolarizability.64 III.5.Conclusion..............................................66 III.6.References..............................................69 ChapterⅣ:Luminescenceofeuropiumdopedanddysprosiumcodopedantimonybasedglasses IV.1.Introduction.............................................72 |
| Type de document : | Thése doctorat |
Disponibilité (1)
| Cote | Support | Localisation | Statut |
|---|---|---|---|
| TPHY/15 | Théses de doctorat | bibliothèque sciences exactes | Consultable |
