6533b82cfe1ef96bd128ea55

RESEARCH PRODUCT

Influence of Compressive Stress on Dielectric and Ferroelectric Properties of the Na0. 5K0.5NbO3, Na0.5K0.5(Nb0.94Sb0.06)O3and Na0.5K0.5(Nb0.94Sb0.06)O3+0.5mol%MnO2Ceramics

M. KarpierzAndris SternbergG. KlimkowskiU. LewczukJan SuchaniczI. Faszczowy

subject

PermittivityPhase transitionMaterials scienceSinteringDielectricCondensed Matter PhysicsHot pressingFerroelectricityElectronic Optical and Magnetic Materialsvisual_artvisual_art.visual_art_mediumHardening (metallurgy)CeramicComposite material

description

Good quality lead-free ceramics of Na0.5K0.5NbO3, Na0.5K0.5(Nb0.94Sb0.06)O3 and Na0.5K0.5(Nb0.94Sb0.06)O3 +0.5mol%MnO2 have been produced by a solid phase hot pressing sintering process at 1120–1145°C. The dependence of dielectric and ferroelectric properties on the uniaxial pressure (0–3000 bar) of the these samples was investigated, revealing a significant influence of the external stress on their properties. This includes a shift of the phase transition, a diffuseness of the permittivity characteristics, a change of the dielectric dispersion and a decrease of the polarization. We discuss our results based on hardening of the soft-mode and domain switching processes under applying of pressure.

https://doi.org/10.1080/00150193.2013.845498