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Effects of substitution in A- and B-site cations of Bi0.5Na0.5TiO3

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2 Author(s)
Herabut, A. ; Dept. of Ceramics, Rutgers Univ., Piscataway, NJ, USA ; Safari, A.

Bismuth sodium titanate (Bi0.5Na0.5TiO3 ), BNT, with a small amount of additives including La, Sm, Nd, and Nb were prepared by a conventional mixed oxide method. Powders of all compositions were calcined at 800°C for 2 hrs to form a pure perovskite phase. All specimens were sintered at 1150°C for 2 hrs to achieve at least 95% theoretical densities. Samples of the BNT with La modification exhibited a dielectric permittivity of 515, electromechanical coupling factors kt of 45% and kp, of 13%, and a piezoelectric charge coefficient d33 of 100. The properties of the La-modified BNT suggest that these compositions are potential candidates for hydrophone applications

Published in:

Applications of Ferroelectrics, 1996. ISAF '96., Proceedings of the Tenth IEEE International Symposium on  (Volume:2 )

Date of Conference:

18-21 Aug 1996