Composition Dependent Piezoelectric Properties of Pb-free (Bi0.o5N0o 5)1-x) BaxTiO3 Ceramics

Author

Sung, Y.S. ; Cho, J.H. ; Song, T.K. ; Jeong, S.J. ; Song, J.S. ; Kim, M.H.

Author_Institution

Changwon Nat. Univ., Changwon

fYear

2007

fDate

27-31 May 2007

Firstpage

692

Lastpage

695

Abstract

An optimum composition for maximizing piezoelectric properties of (Bi_0.5Na_0.5)_(1-x)Ba_xTiO₃ ceramics was investigated within the range of x=0-0.1 covering rhombohedral to tetragonal phase regions of the system. A perovskite structure with two different crystal symmetries depending on the Ba content was formed with no impurity phases. A range of morphotropic phase boundary dividing rhombohedral and tetragonal phase regions was found to exist at x=0.05~0.08. As for piezoelectric properties the piezoelectric constant (d₃₃) and the electromechanical coupling factor (K_p) showed a peak value at x=0.065 within the range tested, which was 192 pC/N and 34%, respectively, implying x=0.065 as an optimum composition for piezoelectric (Bi_0.5Na_0.5)_(1-x)Ba_xTiO₃ ceramics.

Keywords

barium compounds; bismuth compounds; crystal symmetry; electromechanical effects; ferroelectric transitions; piezoceramics; piezoelectricity; sodium compounds; Bi_0.5Na_0.5BaTiO₃; crystal symmetries; electromechanical coupling factor; ferroelectric ceramics; morphotropic phase boundary; perovskite structure; piezoelectric constant; piezoelectric properties; Biological materials; Bismuth; Ceramics; Composite materials; Ferroelectric materials; Magnetic materials; Magnetic properties; Piezoelectric devices; Piezoelectric materials; Powders;

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.2007.4393373

Filename

4393373