Search results for "Potassium niobate"

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Broadband Dielectric Investigation of Sodium Potassium Niobate Ceramic Doped 8% of Antimony

2012

In this work we present dielectric permittivity measurement results of KNN ceramic doped antimony (K0.5Na0.5)(Nb0.92Sb0.08)O3 with sintering aid MnO2 (0.5 mol% MnO2) (KNNSbx + 0.5Mn). Its dielectric properties were investigated in broad frequency (from 20 Hz to 32 GHz) and temperature (from 26 K to 780K) ranges. Above room temperature obtained results show two diffused phase transitions. Below room temperature investigation revealed dielectric permittivity dispersion similar to the relaxor one. The obtained mean relaxation times fulfills Arrhenius relationship with dipole activation energy Ea/kB = 2282 K.

Potassium niobateMaterials scienceAnalytical chemistryRelative permittivitychemistry.chemical_elementDielectricActivation energyCondensed Matter PhysicsArrhenius plotElectronic Optical and Magnetic MaterialsDielectric spectroscopychemistry.chemical_compoundchemistryAntimonyvisual_artvisual_art.visual_art_mediumCeramicFerroelectrics

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