Search results for " Ferroelectrics"

showing 2 items of 2 documents

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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Local structural investigation of hafnia-zirconia polymorphs in powders and thin films by X-ray absorption spectroscopy

2019

Björn Matthey (Fraunhofer IKTS, Dresden) is acknowledged for providing HfO2 and ZrO2 powders on short notice after DESY’s renowned customs office punished us. Parts of this research were carried out at Petra III at DESY, a member of the Helmholtz Association (HGF). The experiments on single Si:HfO2 thin film samples were performed at the CLAESS beamline at ALBA Synchrotron with the collaboration of ALBA staff. We would like to thank Edmund Welter for assistance (in using beamline P65) and DESY for enabling this research for proposal no. 20160591 and for travel support. T.S. acknowledges the German Research Foundation (DFG) for funding this work in the frame of the project “Inferox” (project…

Ferroelectrics670Materials sciencePolymers and PlasticsAbsorption spectroscopyexafsExtended X-ray absorption fine structure X-ray absorption near edge structure Ferroelectrics Hafnium oxide Zirconium oxide02 engineering and technologydopants01 natural sciencesferroelectric propertieshafnium oxideTetragonal crystal systemformer soviet-unionzirconium oxideddc:6700103 physical sciences:NATURAL SCIENCES:Physics [Research Subject Categories]Zirconium oxideX-ray absorption near edge structureThin filmx-ray absorption near edge structureExtended X-ray absorption fine structureHafnium oxideErweiterte Röntgenabsorptionsfeinstruktur Röntgenabsorptionsstruktur in Randnähe Ferroelektrika Hafniumoxid Zirkoniumoxid010302 applied physicsX-ray absorption spectroscopybiologyExtended X-ray absorption fine structureferroelectricsMetals and Alloyshfo2021001 nanoscience & nanotechnologyHafniabiology.organism_classificationXANESstabilizationdielectricsElectronic Optical and Magnetic Materialsoxygen-ion conductorselectrochemistryextended x-ray absorption fine structureChemical physicsCeramics and Compositesinterface0210 nano-technologyMonoclinic crystal systemActa Materialia
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