S. Priya—contributing editor
Crystallographic Evolution, Dielectric, and Piezoelectric Properties of Bi4Ti3O12:W/Cr Ceramics
Article first published online: 19 FEB 2010
© 2010 The American Ceramic Society
Journal of the American Ceramic Society
Volume 93, Issue 5, pages 1414–1421, May 2010
How to Cite
Hou, J., Qu, Y., Vaish, R., Varma, K. B. R., Krsmanovic, D. and Kumar, R. V. (2010), Crystallographic Evolution, Dielectric, and Piezoelectric Properties of Bi4Ti3O12:W/Cr Ceramics. Journal of the American Ceramic Society, 93: 1414–1421. doi: 10.1111/j.1551-2916.2009.03582.x
- Issue published online: 26 APR 2010
- Article first published online: 19 FEB 2010
- Manuscript No. 26542. Received July 15, 2009; approved December 2, 2009.
W/Cr codoped Bi4Ti3O12 ceramics, Bi4Ti3−xWxO12+x+0.2 wt%Cr2O3 (BITWC, x=0–0.15), were prepared using a solid-state reaction method. The crystallographic evolution and phase analysis were distinctly determined focusing on the X-ray diffraction peak changes in (020)/(200) and (220)/(1115) diffraction planes, by which the lattice parameters, a, b, and c can be refined. The thermal variations of permittivity, dielectric loss (tan δ), impedance, and electrical conductivity properties were characterized. A decrease in the values of Curie temperature from 675° to 640°C and an increase in the values of the dielectric constant due to an increase of W6+/Cr3+ content were observed. The highest piezoelectric constant, d33 of 22 pC/N, was achieved with the composition of Bi4Ti2.975W0.025O12.025+0.2 wt% Cr2O3. Also, this composition had a lower electrical conductivity than the other investigated compositions.