Title :
Phase Transition Temperatures and Piezoelectric Properties of (Bi1/2Na1/2)TiO3-(Bi1/2Li1/2)TiO3-(Bi1/2K1/2)TiO3 Ternary Systems
Author :
Hiruma, Yuji ; Nagata, Hajime ; Takenaka, Tadashi
Author_Institution :
Tokyo Univ. of Sci., Chiba
Abstract :
The phase transition temperatures and piezoelectric properties of x(Bi1/2Na1/2)TiO3-y(Bi1/2Li1/2)TiO3-z(Bi1/2K1/2)TiO3 (x+y+z=1) (BNLKT 100y-100z) ceramics were investigated. BNLKT 100y-100z (y=0-0.08) show the morphotropic phase boundaries between rhombohedral and tetragonal around y=0.18-0.20. MPB compositions showed large piezoelectric properties, however, depolarization temperatures, Td, were low. On the other hand, BNLKT4-28 with tetragonal composition shows comparatively high Td and d33 of 227degC and 147 pC/N, respectively.
Keywords :
bismuth compounds; crystal structure; dielectric depolarisation; ferroelectric transitions; lithium compounds; piezoceramics; potassium compounds; sodium compounds; Bi0.5Na0.5TiO3-Bi0.5Li0.5TiO3-Bi0.5K0.5TiO3; ceramics; depolarization temperatures; morphotropic phase boundaries; phase transition temperatures; piezoelectric properties; Bismuth; Capacitance measurement; Ceramics; Dielectric measurements; Electric variables measurement; Permittivity measurement; Resonance; Shape measurement; Temperature dependence; Temperature measurement;
Conference_Titel :
Applications of Ferroelectrics, 2007. ISAF 2007. Sixteenth IEEE International Symposium on
Conference_Location :
Nara
Print_ISBN :
978-1-4244-1334-8
Electronic_ISBN :
1099-4734
DOI :
10.1109/ISAF.2007.4393357
