Enhanced pyroelectric and piezoelectric responses in W/Mn-codoped Bi4Ti3O12Aurivillius ceramics

Authors

Yanxue Tang, Shanghai Normal University
Zongyang Shen, Jingdezhen Ceramic Institute
Qiuxiang Du, Shanghai Normal University
Xiangyong Zhao, Shanghai Normal University
Feifei Wang, Shanghai Normal University
Xiaomei Qin, Shanghai Normal University
Tao Wang, Shanghai Normal University
Wangzhou Shi, Shanghai Normal University
Dazhi Sun, Shanghai Normal University
Zhiyong Zhou, Shanghai Institute of Ceramics
Shujun Zhang, University of WollongongFollow

RIS ID

129873

Publication Details

Tang, Y., Shen, Z., Du, Q., Zhao, X., Wang, F., Qin, X., Wang, T., Shi, W., Sun, D., Zhou, Z. & Zhang, S. (2018). Enhanced pyroelectric and piezoelectric responses in W/Mn-codoped Bi4Ti3O12Aurivillius ceramics. Journal of the European Ceramic Society, 38 (16), 5348-5353.

Abstract

The pyroelectric and piezoelectric properties of 4 at% Mn-doped Bi4Ti2.9W0.1O12(BiTW-Mn) Aurivillius ceramic were investigated and compared to Bi4Ti2.9W0.1O12(BiTW) counterpart, which were fabricated using a conventional solid state reaction method. High resistivities of 4.9 x 1012and 2.5 x 1011Ω cm at 100 °C were obtained in the W-doped and W/Mn-codoped BiT ceramics, respectively. They showed similar activation energies and ionic-p-type mixed conduction mechanisms. Higher pyroelectric coefficients of 57.1 μC/m2K and piezoelectric coefficients of 21 pC/N, as well as much lower dielectric loss of 0.003 were achieved in W/Mn-codoped ceramics. These property changes were mainly induced by MnTi−Vodefect dipoles. The effect of acceptor doping was evidenced by an internal bias field, shown by a horizontal offset in the polarization-field behavior. The improved properties together with high thermal stability indicate that BiTW-Mn may be a promising candidate for pyroelectric and piezoelectric devices at elevated temperatures.