TY - JOUR
T1 - Dielectric and piezoelectric properties of (1 - X)(Na0.5K 0.5)NbO3-xBaTiO3 ceramics
AU - Ahn, Cheol Woo
AU - Choi, Chang Hak
AU - Park, Hwi Yeol
AU - Nahm, Sahn
AU - Priya, Shashank
N1 - Funding Information:
Acknowledgements The authors gratefully acknowledge the financial support from the office of Basic Energy Science, Department of Energy.
PY - 2008/10
Y1 - 2008/10
N2 - This manuscript reviews the studies on phase transitions, synthesis, and piezoelectric/dielectric properties of (1 - x)(Na0.5K 0.5)NbO3-xBaTiO3 ceramics (0.0 ≤ x ≤ 1.0). Three phase transition regions were observed in (1 - x)(Na 0.5K0.5)NbO3-xBaTiO3 ceramics corresponding to orthorhombic, tetragonal, and cubic phases. The composition 0.95(Na0.5K0.5)NbO3-0.05BaTiO3, which lies on the boundary of orthorhombic and tetragonal phases, was found to exhibit excellent piezoelectric properties. The properties of this composition were further improved by addition of various additives making it suitable for multilayer actuator application. The composition 0.06(Na0.5K 0.5)NbO3-0.94BaTiO3 was found to lie on the boundary of tetragonal and cubic phases. This composition exhibited the microstructure with small grain size and excellent dielectric properties suitable for multilayer ceramic capacitor application. Based on the studies reported in literature, we expect the modified (1 - x)(Na0.5K 0.5)NbO3-xBaTiO3 system to become the leading lead-free candidate for piezoelectric and dielectric components.
AB - This manuscript reviews the studies on phase transitions, synthesis, and piezoelectric/dielectric properties of (1 - x)(Na0.5K 0.5)NbO3-xBaTiO3 ceramics (0.0 ≤ x ≤ 1.0). Three phase transition regions were observed in (1 - x)(Na 0.5K0.5)NbO3-xBaTiO3 ceramics corresponding to orthorhombic, tetragonal, and cubic phases. The composition 0.95(Na0.5K0.5)NbO3-0.05BaTiO3, which lies on the boundary of orthorhombic and tetragonal phases, was found to exhibit excellent piezoelectric properties. The properties of this composition were further improved by addition of various additives making it suitable for multilayer actuator application. The composition 0.06(Na0.5K 0.5)NbO3-0.94BaTiO3 was found to lie on the boundary of tetragonal and cubic phases. This composition exhibited the microstructure with small grain size and excellent dielectric properties suitable for multilayer ceramic capacitor application. Based on the studies reported in literature, we expect the modified (1 - x)(Na0.5K 0.5)NbO3-xBaTiO3 system to become the leading lead-free candidate for piezoelectric and dielectric components.
UR - http://www.scopus.com/inward/record.url?scp=55149125114&partnerID=8YFLogxK
U2 - 10.1007/s10853-008-2934-1
DO - 10.1007/s10853-008-2934-1
M3 - Article
AN - SCOPUS:55149125114
SN - 0022-2461
VL - 43
SP - 6784
EP - 6797
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 20
ER -