High-temperature (1-x)BiSc1/2Fe1/2O3-xPbTiO3 piezoelectric ceramics -: art. no. 242901

Perovskite-structured ceramics in the (1-x)BiSc1/2Fe1/2O3-xPbTiO(3) (BSF-PT) system were fabricated for x >= 0.45 in which a morphotropic phase boundary (MPB) occurred between rhombohedral and tetragonal phases at x approximate to 0.50 (T-C=440 degrees C). Samples close to the MPB gave piezoelectric and electromechanical coupling coefficients of similar to 300 pC/N and 0.5, respectively. The low cost of BSF-PT in comparison to (1-x)BiScO3-xPbTiO(3) (BS-PT) coupled with its high T-C and usable piezoelectric properties suggests future commercial exploitation.