TY - JOUR
T1 - Thermal depolarization and electromechanical hardening in Zn2+-doped Na1/2Bi1/2TiO3-BaTiO3
AU - Kodumudi Venkataraman, Lalitha
AU - Zhu, Tingting
AU - Pinto Salazar, Monica
AU - Hofmann, Kathrin
AU - Iqbal Waidha, Aamir
AU - Jaud, J. C.
AU - Groszewicz, Pedro B.
AU - Rödel, Jürgen
PY - 2021
Y1 - 2021
N2 - Na
1/2Bi
1/2TiO
3-based materials have been earmarked for one of the first large-volume applications of lead-free piezoceramics in high-power ultrasonics. Zn
2+-doping is demonstrated as a viable route to enhance the thermal depolarization temperature and electromechanically harden (1-y)Na
1/2Bi
1/2TiO
3-yBaTiO
3 (NBT100yBT) with a maximum achievable operating temperature of 150 °C and mechanical quality factor of 627 for 1 mole % Zn
2+-doped NBT6BT. Although quenching from sintering temperatures has been recently touted to enhance T
F-R, with quenching the doped compositions featuring an additional increase in T
F-R by 17 °C, it exhibits negligible effect on the electromechanical properties. The effect is rationalized considering the missing influence on conductivity and therefore, negligible changes in the defect chemistry upon quenching. High-resolution diffraction indicates that Zn
2+-doped samples favor the tetragonal phase with enhanced lattice distortion, further corroborated by
23Na Nuclear Magnetic Resonance investigations.
AB - Na
1/2Bi
1/2TiO
3-based materials have been earmarked for one of the first large-volume applications of lead-free piezoceramics in high-power ultrasonics. Zn
2+-doping is demonstrated as a viable route to enhance the thermal depolarization temperature and electromechanically harden (1-y)Na
1/2Bi
1/2TiO
3-yBaTiO
3 (NBT100yBT) with a maximum achievable operating temperature of 150 °C and mechanical quality factor of 627 for 1 mole % Zn
2+-doped NBT6BT. Although quenching from sintering temperatures has been recently touted to enhance T
F-R, with quenching the doped compositions featuring an additional increase in T
F-R by 17 °C, it exhibits negligible effect on the electromechanical properties. The effect is rationalized considering the missing influence on conductivity and therefore, negligible changes in the defect chemistry upon quenching. High-resolution diffraction indicates that Zn
2+-doped samples favor the tetragonal phase with enhanced lattice distortion, further corroborated by
23Na Nuclear Magnetic Resonance investigations.
KW - Na Bi TiO
KW - Zn -doping
KW - electromechanical hardening
KW - quenching
KW - thermal depolarization
UR - http://www.scopus.com/inward/record.url?scp=85099912291&partnerID=8YFLogxK
U2 - 10.1111/jace.17581
DO - 10.1111/jace.17581
M3 - Article
AN - SCOPUS:85099912291
SN - 0002-7820
VL - 104
SP - 2201
EP - 2212
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 5
ER -