S. Troiler-McKinstry—contributing editor
Structural and Electrical Properties of Lead-Free Perovskite Ba(Al1/2Nb1/2)O3
Article first published online: 11 NOV 2009
© 2009 The American Ceramic Society
Journal of the American Ceramic Society
Volume 93, Issue 1, pages 190–196, January 2010
How to Cite
Prasad, K., Chandra, K. P., Bhagat, S., Choudhary, S. N. and Kulkarni, A. R. (2010), Structural and Electrical Properties of Lead-Free Perovskite Ba(Al1/2Nb1/2)O3. Journal of the American Ceramic Society, 93: 190–196. doi: 10.1111/j.1551-2916.2009.03394.x
The present work has been supported by Defense Research and Development Organization, New Delhi under the Grant No. ERIP/ER/0605044/M/01/928. One of the authors (K. P. C.) acknowledges INSA, New Delhi for providing visiting fellowship.
- Issue published online: 21 DEC 2009
- Article first published online: 11 NOV 2009
- Manuscript No. 25720. Received January 17, 2009; approved August 20, 2009.
Lead-free perovskite Ba(Al1/2Nb1/2)O3 was prepared by conventional ceramic fabrication technique at 1350°C/5 h in air atmosphere. The crystal symmetry, space group and unit cell dimensions were determined from the experimental results using FullProf software whereas crystallite size and lattice strain were estimated from Williamson-Hall approach. X-ray diffraction analysis of the compound indicated the formation of a single-phase monoclinic structure with the space group P2/m. EDAX and SEM studies were carried out in order to evaluate the quality and purity of the compound. Permittivity data showed low-temperature coefficient of capacitance (TCC=14%) up to 100°C. To find a correlation between the response of the real system and idealized model circuit composed of discrete electrical components, the model fittings were presented using the impedance data. Complex impedance analyses suggested the dielectric relaxation to be of non-Debye type. The correlated barrier-hopping model was used to successfully explain the mechanism of charge transport in Ba(Al1/2Nb1/2)O3.