0000000000413723

AUTHOR

L. Eglite

showing 3 related works from this author

Grain growth in Na 0.5 Bi 0.5 TiO 3 -based solid solutions

2019

This paper discusses effects of different dopants, sintering technique and parameters on microstructure and properties of pure and Yb, Er-doped Na0.5Bi0.5TiO3 (NBT). All stoichiometric compositions follow the abnormal grain growth mechanism (AGG) and exhibit a bimodal grain size distribution. Bi over-stoichiometry, two step sintering and hot pressing are effective inhibitors of AGG. Microstructure of sintered NBT greatly influences such properties as dielectric permittivity and depolarization temperature.

Materials sciencesolid-state sinteringSintering02 engineering and technologyAbnormal grain growth01 natural sciencesNBT0103 physical sciencesMaterials Chemistry:NATURAL SCIENCES:Physics [Research Subject Categories]Electrical and Electronic Engineering010302 applied physicsDopantabnormal grain growthLead-free ferroelectrics021001 nanoscience & nanotechnologyCondensed Matter PhysicsMicrostructureElectronic Optical and Magnetic MaterialsGrain growthChemical engineeringControl and Systems EngineeringCeramics and Composites0210 nano-technologyStoichiometrySolid solutionIntegrated Ferroelectrics
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Dielectric and acoustic properties of modified barium titanate ceramics

2019

This work was supported in part by the Ministry of Education and Science of the Russian Federation.

Materials sciencechemistry.chemical_elementdoping02 engineering and technologyDielectricPerovskite01 natural scienceschemistry.chemical_compoundbarium titanate0103 physical sciences:NATURAL SCIENCES:Physics [Research Subject Categories]CeramicComposite material010302 applied physicsferroelectricsDoping021001 nanoscience & nanotechnologyCondensed Matter PhysicsDielectric responseElectronic Optical and Magnetic MaterialsPerovskitechemistryvisual_artBarium titanatevisual_art.visual_art_medium0210 nano-technologyCobaltSolid solutionFerroelectrics
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The role of disorder on Er3+ luminescence in Na1/2Bi1/2TiO3

2018

Abstract Photoluminescence in Er-doped NBT is studied at different temperatures. Remarkable reduction of the luminescence intensity in the green spectral range is found in the poled state comparing with the depoled state. Luminescence spectra at low temperatures reveal continuous wavelength shift of some maxima belonging to the 4 S 3/2  →  4 I 15/2 transition depending on the excitation wavelength, which is explained by large variety of different environments around Er 3+ related to the random distribution of Na + and Bi 3+ in A-sublattice of the ABO 3 perovskite structure. Poling extends the wavelength range where shift of luminescence maxima is observed in the direction of longer excitati…

010302 applied physicsRange (particle radiation)PhotoluminescenceMaterials scienceMechanical EngineeringPolingMetals and AlloysPhysics::Optics02 engineering and technology021001 nanoscience & nanotechnology01 natural sciencesMolecular physicsIonCondensed Matter::Materials ScienceWavelengthMechanics of Materials0103 physical sciencesMaterials Chemistry0210 nano-technologyMaximaLuminescenceExcitationJournal of Alloys and Compounds
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