Search results for " Strontium titanate"

showing 2 items of 2 documents

Dielectric properties of barium strontium titanate / non ferroelectric oxide ceramic composites

2001

International audience; Barium strontium titanate ceramics present high dielectric permittivity and tunability. In order to reduce their permettivity and loss tangent while keeping tunability, various composites of barium strontium titanate oxide...

Oxide ceramicsCeramicsMaterials scienceDielectricOxide02 engineering and technologyDielectric01 natural scienceschemistry.chemical_compound0103 physical sciencesGeneral Materials ScienceCeramicComposite materialHigh dielectric permittivity010302 applied physicsMechanical EngineeringOxides[CHIM.MATE]Chemical Sciences/Material chemistry021001 nanoscience & nanotechnologyFerroelectricitychemistryMechanics of Materialsvisual_artBarium strontium titanate[ CHIM.MATE ] Chemical Sciences/Material chemistryBarium strontium titanatevisual_art.visual_art_mediumDissipation factor0210 nano-technologyFerroelectric
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SrTiO 3 -based perovskites: Preparation, characterization and photocatalytic activity in gas–solid regime under simulated solar irradiation

2015

Strontium titanate-based perovskites have been prepared in the presence of Y and Co with the aim to substitute Sr and Ti, respectively, in the ST crystalline structure. The obtained samples have been characterized by XRD, Raman spectroscopy, FE-SEM, XPS and tested as photocatalysts in two gas-solid regime reactions: (i) 2-propanol complete mineralization and (ii) propene partial oxidation, using a system simulating solar irradiation. All the tested samples resulted active as photocatalysts but with significant differences. The lattice substitution of Sr by Y displays a beneficial effect on the 2-propanol photodegradation. Conversely, the partial presence of cobalt on the ST surface, as Co-o…

Propene partial oxidationInorganic chemistrychemistry.chemical_elementPerovskiteCatalysis2-PropanolPropenechemistry.chemical_compoundsymbols.namesakeX-ray photoelectron spectroscopyPartial oxidationPhotocatalysisPhysical and Theoretical ChemistryPhotodegradationSettore CHIM/02 - Chimica Fisicaintegumentary systemPerovskite Strontium titanate Photocatalysis Propene partial oxidation 2-PropanolSettore ING-IND/22 - Scienza E Tecnologia Dei MaterialichemistryPhotocatalysisStrontium titanatesymbolsStrontium titanateSettore CHIM/07 - Fondamenti Chimici Delle Tecnologie2-Propanol; Perovskite; Photocatalysis; Propene partial oxidation; Strontium titanate; Catalysis; Physical and Theoretical ChemistryRaman spectroscopyCobaltJournal of Catalysis
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