2011•Integrated ferroelectricsRequires access
Dielectric Properties of Na0.5K0.5(Nb1-xSbx)O3+MnO2 Ceramics (x = 0.04, 0.05 and 0.06)
J. Suchanicz, A. Finder, Ilze Smeltere, K. Konieczny, Irena Jankowska‐Sumara, B. Garbarz-Glos, M. Sokołowski, R. Bujakiewicz-Korońska, Krzysztof Pytel, M. Antonova, A. Sternberg
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Abstract
Lead-free ceramics Na0.5K0.5(Nb1-xSbx)O3+0.5mol%MnO2 (x = 0.04, 0.05 and 0.06) were prepared by conventional sintering and hot pressing process; their microstructure and dielectric properties have been studied. It is found that increase of sintering temperature promotes the obtaining highly dense microstructure and increase in grain size while doping with Sb contributes to more dense and homogeneous microstructure and smaller grain size. Low frequency (100 Hz-200 kHz) investigations revealed the diffuse phase transitions. It can be concluded from experimental results that Sb doping improves dielectric properties. The obtained materials are expected to be promising candidates for lead-free electronic ceramics.