2015 Volume 56 Issue 9 Pages 1378-1382
Lead-free ceramics of composition (0.97 − x)Bi0.5Na0.4K0.1TiO3-0.03BiAlO3-xBi0.5Li0.5TiO3 (BNKTBA-xBLTO) were synthesized using solid state technique. The strong enhancements in ferroelectric and electric-field-induced strain were obtained. The electric-field-induced strain values were increased from 410 pm/V to 688 pm/V for 6 mol% BLTO-added which results from the phase transition from rhombohedral to tetragonal structure. The maximum spontaneous polarization increased from 26.5 µC/cm2 to 30.8 µC/cm2 for 4 mol% BLTO solid solution in BNKTBA and then decreased as BLTO was further added. We expect that this work could be helpful for further understanding the original enhancement in electrical field-induced strain in lead-free BNKT-based ceramics due to comparison between A- and B-site co-modifications.
