Electric Properties of Sr1-xBi2+xTa2-yNbyO9 Ceramics
The dielectric, ferroelectric and piezoelectric properties of strontium bismuth tantalate niobate, Sr1-xBi2+xTa2-yNbyO9 [SBTN10x(y)] ceramics were investigated. The samples were fabricated by a conventional ceramic fabrication technique. Curie temperature, Tc, increased with an increase in Nb concentration y, and Tc of SBTN2(y) showed two regions with different slopes that divided near y=1.0. The coercive field, Ec, of SBTN2(y) increased with the increase in y and the highest Ec of 90 kV/cm was obtained. SBTN2(0.6) and SBTN2(1.0) showed the highest coupling factor k33 of 0.17 in the SBTN2(x) system.
Masaru Miyayama, Tadashi Takenaka, Masasuke Takata and Kazuo Shinozaki
T. Takenaka "Electric Properties of Sr1-xBi2+xTa2-yNbyO9 Ceramics", Key Engineering Materials, Vol. 301, pp. 11-14, 2006