TY - JOUR N2 - Lead-free ceramics of Na0.5K0.5Nb1-xSbxO3 (NKNS) and Na0.5K0.5Nb1-xSbxO3 + 0.5 mol%MnO2 (NKNS + 0.5 mol%MnO2) (0 < x < 0.06) ceramics were prepared by a conventional solid-state hot pressing method. The ceramics possess a single-phase perovskite structure with orthorhombic symmetry. Microstructural examination revealed that Mn doping of NKNS leads to improvement of densification. The cubic-tetragonal and tetragonal-orthorhombic phase transitions of NKNS shifted to higher and lower temperature, respectively after introduction of Mn ion. Besides, ferroelectric and piezoelectric properties were improved. The results were discussed in term of difference in both ionic size and electronegativity of Nb5+ and Sb5+ and improvement of densification after Mn ion doping. L1 - http://journals.pan.pl/Content/106668/PDF/AMM-2018-2-14-Suchanicz.pdf L2 - http://journals.pan.pl/Content/106668 PY - 2018 IS - No 2 DO - 10.24425/122387 KW - Na0.5K0.5-NbO3- based ceramics KW - structural properties KW - ferroelectric properties KW - dielectric properties KW - piezoelectric properties A1 - Suchanicz, J. A1 - Faszczowy I. A1 - Czaja, P. A1 - Kusz, J. A1 - Zubko, M. PB - Institute of Metallurgy and Materials Science of Polish Academy of Sciences PB - Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences VL - vol. 63 DA - 2018.06.30 T1 - Effect of Sb and MnO2-Doping on Phase Transitions, Crystal Structure, Thermal, Dielectric, Ferroelectric and Piezoelectric Properties of Na0.5K0.5NbO3 Ceramics UR - http://journals.pan.pl/dlibra/publication/edition/106668 T2 - Archives of Metallurgy and Materials ER -