Search results for "state sintering"

showing 3 items of 3 documents

Preparation and dielectric properties of (Na 0.5 K 0.5 )NbO 3 ceramics with ZnO and CdO addition

2019

The sintering conditions, phase structure, and electrical properties of the ZnO and CdO doped (Na0.5K0.5)NbO3 (NKN) ceramics were investigated and discussed. All the samples were prepared by a solid state reaction method. The addition of 1 wt% CdO and ZnO as a sintering aid increases the density and lowering the sintering temperature. XRD analysis indicated perovskite structure with monoclinic symmetry. The investigated samples are good quality, the grains are well shaped without a glassy phase. The results of dielectric measurements revealed, that the dielectric properties of NKN based ceramics are stable in the wide temperature range.

010302 applied physicsMaterials scienceDopingSintering02 engineering and technologyDielectric021001 nanoscience & nanotechnologyCondensed Matter Physics01 natural sciencesElectronic Optical and Magnetic Materialssodium potassium niobateChemical engineeringControl and Systems Engineeringdielectric propertiesvisual_artPhase (matter)0103 physical sciencesMaterials ChemistryCeramics and Compositesvisual_art.visual_art_medium:NATURAL SCIENCES:Physics [Research Subject Categories]CeramicElectrical and Electronic Engineering0210 nano-technologySolid state sinteringIntegrated Ferroelectrics
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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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Numerical modeling of the solid-state sintering at the microstructural level: Multiphysics approach and application to metal additive manufacturing

2023

Numerical modeling of the solid-state sintering at the microstructural level: Multiphysics approach and application to metal additive manufacturing

Solid[SPI] Engineering Sciences [physics]finite element methodmicrostructure evolutionmultiphysics couplingmetal additive manufacturingstate sinteringstain steel 316L.
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