Synthesis and dielectric properties of modified potassium sodium niobate solid solutions

Synthesis and dielectric properties of modified potassium sodium niobate solid solutions

In the present work processing microstructure and dielectric properties of lead free KNN based ceramics have been studied. Compositions with a stoichiometric formula (1 − x )(K 0.5 Na 0.5 )Nb 1 − y Sb y O 3 - x BaTiO 3 ( x = 0.01, 0.02, 0.04; y = 0.04, 0.07) were produced by solid state sintering me...

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Veröffentlicht in:Physics of the solid state 2012-05, Vol.54 (5), p.994-996
Hauptverfasser: Smeltere, I., Antonova, M., Kalvane, A., Bormanis, K., Livinsh, M.
Format: Artikel
Sprache:eng
Schlagworte:
Ceramic materials
Ceramics
Dielectrics
Diffraction
Electric properties
Electrical conductivity
Perovskite
Physics
Physics and Astronomy
Proceedings of the XIX All-Russian Conference on Physics of Ferroelectrics (VKS-XIX)
Sintering
Solid solutions
Solid State Physics
X-rays
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Zusammenfassung:In the present work processing microstructure and dielectric properties of lead free KNN based ceramics have been studied. Compositions with a stoichiometric formula (1 − x )(K 0.5 Na 0.5 )Nb 1 − y Sb y O 3 - x BaTiO 3 ( x = 0.01, 0.02, 0.04; y = 0.04, 0.07) were produced by solid state sintering method. The addition of manganese oxide MnO 2 after synthesis promoted the sintering and densification of ceramic samples. The influence of BaTiO 3 on the microstructure, density and electrical properties was investigated. X-ray diffraction analysis confirmed that obtained samples had a pure perovskite structure with no traces of secondary phase. Phase transition peak at T c is broad indicating the diffuse phase transition.
ISSN:1063-7834
1090-6460
DOI:10.1134/S1063783412050393