0000000000285014

AUTHOR

Henryk Noga

showing 3 related works from this author

Investigation of mechanical and electrical properties of Li doped sodium niobate ceramic system

2016

ABSTRACTThe Na0.96Li0.04NbO3 ceramic solid solution was prepared by means of a two-stage hot-pressing technology. The X-ray diffraction analysis showed the formation of a single perovskite phase with an orthorhombic symmetry in the investigated composition. The microstructure and EDS measurements were performed. They confirmed the high purity and the expected qualitative composition. A good homogeneity of the microstructures and a small degree of porosity were observed. The elastic modulus (the Young's modulus E, shear modulus G, and Poisson's ratio ν) of Na0.96Li0.04NbO3 were determined with the use of an ultrasonic method. The electrical properties of Na0.96Li0.04NbO3 ceramics were invest…

010302 applied physicsMaterials scienceModulusMineralogy02 engineering and technologyDielectric021001 nanoscience & nanotechnologyCondensed Matter PhysicsMicrostructure01 natural sciencesElectronic Optical and Magnetic MaterialsShear modulusControl and Systems Engineeringvisual_art0103 physical sciencesMaterials ChemistryCeramics and Compositesvisual_art.visual_art_mediumCeramicElectrical and Electronic EngineeringComposite material0210 nano-technologyPorosityElastic modulusSolid solutionIntegrated Ferroelectrics
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Germanium modified BaTiO3as a promising electroceramics

2016

ABSTRACTThe polycrystalline sample of BaTi0.95Ge0.05O3 was prepared by solid-phase reaction using a conventional method. The morphology of investigated sample was characterised by scanning electron microscopy (SEM). The results allowed to determining the stoichiometry of the material and evaluate their microstructure. High quality samples were investigated, the grains are well shaped without of a glassy phase. The dielectric properties of the BaTi0.95Ge0.05O3 ceramics were determined. The results were compared with these ones obtained for pure BaTiO3. The obtained data indicated that the substitution of Ge+4 ions had an influence on the values of the real (ϵ′) and imaginary (ϵ″) parts of el…

PermittivityMaterials scienceScanning electron microscopeAnalytical chemistryMineralogychemistry.chemical_elementGermanium02 engineering and technologyDielectric01 natural scienceschemistry.chemical_compound0103 physical sciencesMaterials ChemistryElectrical and Electronic Engineering010302 applied physics021001 nanoscience & nanotechnologyCondensed Matter PhysicsMicrostructureElectronic Optical and Magnetic MaterialschemistryControl and Systems EngineeringBarium titanateCeramics and CompositesCrystalliteElectroceramics0210 nano-technologyIntegrated Ferroelectrics
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Dielectric behaviour of BaTi1-xZrxO3ceramics obtained by means of a solid state and mechanochemical synthesis

2016

ABSTRACTIn this study the comparison of dielectric behaviour of BaTi1-xZrxO3 (BTZx) ceramic samples prepared by means of a solid state and mechanochemical synthesis was presented. A single phase of perovskite structure was identified in the samples at room temperature. No significant impurities were detected in an EDS spectrum and the samples had a good stoichiometric ratio. The morphology of the investigated samples was characterized by a scanning electron microscopy (SEM). The investigation of dielectric properties of the BTZx samples within the temperature range from 140 K to 600 K was performed by means of a dielectric spectroscopy method at the frequency ranging from 0.1 Hz to 10 MHz. …

010302 applied physicsPhase transitionMaterials scienceScanning electron microscopeAnalytical chemistry02 engineering and technologyDielectricAtmospheric temperature range021001 nanoscience & nanotechnologyCondensed Matter Physics01 natural sciencesElectronic Optical and Magnetic MaterialsDielectric spectroscopyImpurityvisual_art0103 physical sciencesvisual_art.visual_art_mediumCeramic0210 nano-technologyStoichiometryFerroelectrics
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