Title :
Ferroelectric and Piezoelectric Properties of Pb-free Based (Bio5Nao. 5) TijxDxO3 (D = Nb5+, W6+) Ceramics
Author :
Yeo, Hong-Goo ; Sung, Yeon-Soo ; Song, Tae-Kwon ; Cho, Jong-Ho ; Jeong, Soon-Jong ; Song, Jae-sung ; Kim, Myong-Ho
Author_Institution :
Changwon Nat. Univ., Changwon
Abstract :
In an effort for better understanding on (Bi0.5Na0.5)TiO3, donors such as Nb5+ and W6+ were doped by a conventional solid state mixing process. Their doping effects on ferroelectric and piezoelectric properties of (Bi0.5Na0.5)Ti1-xDxO3 were investigated. The solubility limit of Nb (xles0.01) and W (xles0.008) was determined by the X-ray diffraction after a typical sintering at 1150degC for 2 hours in air. Microstructurally grain size decreased with doping within each solubility limit. As for ferroelectric and piezoelectric properties, coercive fields (Ec) and mechanical quality factors (Qm) decreased with doping while piezoelectric constant (d33) increased, which is a similar tendency observed in the typical donor doped Pb(Zr,Ti)O3 ceramics.
Keywords :
X-ray diffraction; bismuth compounds; dielectric hysteresis; doping profiles; ferroelectric ceramics; ferroelectricity; grain size; piezoceramics; piezoelectricity; sintering; sodium compounds; solubility; titanium compounds; Bi0.5Na0.5TiNBO3; Bi0.5Na0.5TiWO3; X-ray diffraction; ceramics; coercive fields; doping effects; ferroelectric properties; hysteresis loop; mechanical quality factors; microstructural grain size; piezoelectric properties; sintering; solid state mixing process; solubility; temperature 1150 C; time 2 hour; Bismuth; Ceramics; Doping; Ferroelectric materials; Grain size; Mechanical factors; Niobium; Q factor; Solid state circuits; X-ray diffraction;
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.2007.4393367
