Title :
Piezoelectric properties of (Bi1/2K1/2)TiO3 - BaTiO3 ceramics with wide working temperatures
Author :
Takenaka, T. ; Hiruma, Y. ; Nemoto, M. ; Nagata, H.
Author_Institution :
Department of Electrical Engineering, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba-ken, 278-8510, Japan
Abstract :
Solid solution system, (1-x)(Bi1/2K1/2)TiO3 - xBaTiO3 (BKT-BT100x), were investigated for evaluating their characterizations and electrical properties as lead free piezoelectric ceramics with wide working temperatures. The BKT-BT100x ceramics of x=0~0.4 indicated high depolarization temperature, Td, around 300°C. Piezoelectric properties such as electro-mechanical coupling factor, k33, and piezoelectric strain constant, d33, for BKT-BT10 are 0.35 and 73.4 pC/N, respectively. From these results, BKT-BT system is the superior candidate of lead-free piezoelectric materials for high power and/or high temperature applications.
Keywords :
Capacitive sensors; Ceramics; Dielectric measurements; Electric variables measurement; Environmentally friendly manufacturing techniques; Ferroelectric materials; Powders; Solids; Temperature; X-ray diffraction;
Conference_Titel :
Applications of Ferroelectrics, 2008. ISAF 2008. 17th IEEE International Symposium on the
Conference_Location :
Santa Re, NM, USA
Print_ISBN :
978-1-4244-2744-4
Electronic_ISBN :
1099-4734
DOI :
10.1109/ISAF.2008.4693840
