Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10155480 | Journal of the European Ceramic Society | 2018 | 24 Pages |
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 4.9âÃâ1012 and 2.5âÃâ1011 Ωâcm at 100â°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 57.1âμC/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 MnTiâVo defect 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.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Yanxue Tang, Zong-Yang Shen, Qiuxiang Du, Xiangyong Zhao, Feifei Wang, Xiaomei Qin, Tao Wang, Wangzhou Shi, Dazhi Sun, Zhiyong Zhou, Shujun Zhang,