Temperature stability of lead-free piezoelectric ceramics of perovskite Bi0.5Na0.5TiO3 and K0.5Na0.5NbO3 families

Author

Xiao, D.Q. ; Wu, L. ; Zhu, J.G.

Author_Institution

Sch. of Mater. Sci. & Eng., Sichuan Univ., Chengdu, China

fYear

2009

fDate

23-27 Aug. 2009

Firstpage

1

Lastpage

4

Abstract

From the viewpoint of application, the temperature stability of the electrical properties of the lead-free piezoelectric ceramics is very important. Therefore, it is important to study the temperature stability of the electrical properties of perovskite Bi_0.5Na{0.5}TiO₃ (BNT)- and K_0.5Na_0.5NbO₃ (KNN)-based (Bi_0.47Na_0.47)Ba_0.06TiO₃ (BNBT6) and (K_0.49Na_0.49)Li_0.02Nb_0.95Sb_0.05O₃ (KNLNS2-5) were selected, and the temperature stability of the dielectric, piezoelectric, and ferroelectric properties of the two kinds of ceramics were compared from the point of view of the application of the ceramics. It was found that the piezoelectric properties of KNLNS2-5 ceramics are much more stable in the orthorhombic phase than in the tetragonal phase. This is an important clue to obtain excellent piezoelectric properties along with good temperature stability for KNN-based ceramics.

Keywords

barium compounds; bismuth compounds; dielectric hysteresis; dielectric losses; ferroelectric transitions; lithium compounds; niobium compounds; permittivity; piezoceramics; piezoelectricity; potassium compounds; sodium compounds; (K_0.49Na_0.49)Li_0.02Nb_0.95Sb_0.05O₃; Bi_0.5Na_0.5TiO₃; K_0.5Na_0.5NbO₃-(Bi_0.47Na_0.47)Ba_0.06TiO₃; dielectric constant; dielectric loss; electrical property; ferroelectric property; hysteresis loops; lead-free piezoelectric ceramics; orthorhombic-tetragonal phase transitions; perovskite materials; piezoelectric property; temperature stability; Bismuth; Ceramics; Decision support systems; Environmentally friendly manufacturing techniques; Stability; Temperature; electrical properties; lead-free piezoelectric ceramics; perovskite; temperature stability;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectrics, 2009. ISAF 2009. 18th IEEE International Symposium on the

Conference_Location

Xian

ISSN

1099-4734

Print_ISBN

978-1-4244-4970-5

Electronic_ISBN

1099-4734

Type

conf

DOI

10.1109/ISAF.2009.5307596

Filename

5307596