6533b835fe1ef96bd129e87c
RESEARCH PRODUCT
Structural and electric characteristics of (Na0.5Bi0.5)0.50Ba0.50TiO3 and (Na0.5Bi0.5)0.20Ba0.80TiO3 ceramics
Jan SuchaniczJoachim KuszH. Böhmsubject
DiffractionPermittivityPhase transitionMaterials scienceCondensed matter physicsMechanical EngineeringDielectricCondensed Matter PhysicsFerroelectricityCrystallographyTetragonal crystal systemMechanics of Materialsvisual_artvisual_art.visual_art_mediumGeneral Materials ScienceDielectric lossCeramicdescription
Abstract (Na0.5Bi0.5)0.50Ba0.50TiO3 and (Na0.5Bi0.5)0.20Ba0.80TiO3 ceramics have been prepared by the solid state reaction and studied by X-ray diffraction and by measurements of dielectric and ferroelectric properties between room temperature and 550 °C. A sharp increase in the electric permittivity and dielectric loss near 212 °C (for the first material) and near 205 °C (for the second material) on heating with remarkable thermal hysteresis have been observed. This sharp increase in dielectric responses indicates transformation between normal and relaxor ferroelectric states. The X-ray diffraction study shows that this transformation corresponds to the first order phase transition from tetragonal to cubic. It was shown that polar regions can exist in higher temperatures in both materials. Also the use of both ceramics for device application has been indicated.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2003-01-01 | Materials Science and Engineering: B |