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

fYear

2007

fDate

27-31 May 2007

Firstpage

673

Lastpage

676

Abstract

In an effort for better understanding on (Bi_0.5Na_0.5)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 (Bi_0.5Na_0.5)Ti_1-xD_xO₃ 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 (E_c) and mechanical quality factors (Q_m) 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; Bi_0.5Na_0.5TiNBO₃; Bi_0.5Na_0.5TiWO₃; 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;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectrics, 2007. ISAF 2007. Sixteenth IEEE International Symposium on

Conference_Location

Nara

ISSN

1099-4734

Print_ISBN

978-1-4244-1334-8

Electronic_ISBN

1099-4734

Type

conf

DOI

10.1109/ISAF.2007.4393367

Filename

4393367