Y. Hou—contributing editor
Phase Transitional Behavior and Electrical Properties of Sr2K0.1Na0.9Nb5−xTaxO15 Ceramics
Article first published online: 2 NOV 2010
© 2010 The American Ceramic Society
Journal of the American Ceramic Society
Volume 93, Issue 12, pages 3986–3989, December 2010
How to Cite
Wei, L., Yang, Z., Ren, H. and Chen, X. (2010), Phase Transitional Behavior and Electrical Properties of Sr2K0.1Na0.9Nb5−xTaxO15 Ceramics. Journal of the American Ceramic Society, 93: 3986–3989. doi: 10.1111/j.1551-2916.2010.04177.x
This work was supported by the Foundation of Doctorial Program in China (Grant No. 20070718004), the National Science Foundation of China (NSFC) (Grant No. 20771070) and the Fundamental Research Funds for the Central Universities (Program No. 2010ZYGX011).
- Issue published online: 1 DEC 2010
- Article first published online: 2 NOV 2010
- Manuscript No. 28397. Received July 27, 2010; approved September 10, 2010.
Lead-free Sr2K0.1Na0.9Nb5−xTaxO15 ceramics were prepared using the conventional mixed-oxide method. The phase transition corresponding to the tetragonal ferroelectric (4mm) to paraelectric (4/mmm) phase was observed with increasing x according to the XRD and dielectric properties results. Ta5+ substitution for Nb5+ inhibited the grain growth and also prevented the abnormal grain growth behavior. The dielectric and ferroelectric properties of the ceramics decreased and even vanished with increasing Ta5+ substitution. Besides, the underlying mechanism for variations of the structures and properties due to Ta5+ substitution was explained in this work.