Influence of Excess Bi2O3 on the Characteristics of (Na0.5Bi0.5)TiO3-BaTiO3 Ceramics


Article Preview

In this study, piezoelectric materials 0.95 (Na0.5Bi0.5)TiO3-0.05 BaTiO3 (NBT-BT) composition with excess x wt% Bi2O3 (x=0, 1, 2, and 3) are investigated as a function of sintering temperatures. The sintering characteristics and dielectric characteristics of excess Bi2O3-doped 0.95 (Na0.5Bi0.5)TiO3- 0.05 BaTiO3 ceramics are developed with the aid of SEM, XRD patterns, and dielectric-temperature curves. The sintering process is carried out in air for 2h from 1120oC to 1200oC. Dielectric-temperature properties are investigated in the temperature range of 30oC~350oC at the frequencies of 10KHz~1MHz. The maximum dielectric constants of NBT-BT ceramics first increase with the increase of Bi2O3 content, reach the maximum at 1wt%- Bi2O3-added NBT-BT ceramics, and then decrease with the further increase of Bi2O3 content. The maximum dielectric constants of NBT-BT ceramics are almost unchanged as the measured frequency increases. The Curie temperatures of NBT-BT ceramics are also developed.



Key Engineering Materials (Volumes 368-372)

Edited by:

Wei Pan and Jianghong Gong




Y. F. Wei et al., "Influence of Excess Bi2O3 on the Characteristics of (Na0.5Bi0.5)TiO3-BaTiO3 Ceramics", Key Engineering Materials, Vols. 368-372, pp. 65-68, 2008

Online since:

February 2008




[1] G.A. Smolenskii, V.A. Isupov, A.I. Agranovskaya, et al.: Sov. Phys. Solid State Vol. 2 (1961), p.2651.

[2] A. Sasaki, T. Chiba, Y. Mamiya, et al.: Jpn. J. Appl. Phys. Vol. 38 (1999), p.5564.

[3] Y.M. Li, W. Chen, Q. Xu, et al.: J. Electroceramics Vol. 14 (2005), p.53.

[4] T. Takenaka, T. Okuda and K. Takegahara: Ferroelectrics Vol. 196 (1997), p.175.

[5] T. Takenaka, K. Maruyama and K. Sakata: Jpn. J. Appl. Phys. Vol. 30 (9B) (1991), p.2236.

[6] S.B. Desu and T.K. Li: Mater. Sci. Eng. B Vol. 34 (1995), p. L4.

[7] T.C. Chen, T. Li, X. Zhang, et al.: J. Mater. Res. Vol. 12 (1997), p.1569.