Title :
Effects of substitution in A- and B-site cations of Bi0.5Na0.5TiO3
Author :
Herabut, A. ; Safari, A.
Author_Institution :
Dept. of Ceramics, Rutgers Univ., Piscataway, NJ, USA
Abstract :
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
Keywords :
bismuth compounds; permittivity; piezoceramics; powder technology; sintering; sodium compounds; 1150 C; 800 C; BNT; Bi0.5Na0.5TiO3; additive; calcination; composition; density; dielectric permittivity; electromechanical coupling factor; hydrophone; mixed oxide synthesis; perovskite phase; piezoelectric charge coefficient; powder; sintering; substitution; Bismuth; Distortion measurement; Ferroelectric materials; Grain size; Lattices; Phase detection; X-ray scattering;
Conference_Titel :
Applications of Ferroelectrics, 1996. ISAF '96., Proceedings of the Tenth IEEE International Symposium on
Conference_Location :
East Brunswick, NJ
Print_ISBN :
0-7803-3355-1
DOI :
10.1109/ISAF.1996.598139
