Dielectric and tunable properties of barium strontium titanate ceramics under the stresses

摘要

The external stress dependence of dielectric and tunable properties of Ba_xSr_(1-x)TiO_3 (x=0.65) ceramics has been investigated. The results reveal that the Curie peaks of samples are suppressed and broadened, the Curie temperature (T_c) is slightly shifted to lower temperature with an increase of external stress. Correspondingly, the tunability decreases from 66.6% to 58.8% in the vicinity of cubic-tetragonal (C-T) phase transition at an applied DC electric held of 10kV/cm. These results could be useful for the design of devices and practical applications of Ba_xSr_(1-x)TiO_3 ceramics.