کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1788269 | 1023465 | 2011 | 4 صفحه PDF | دانلود رایگان |
The phase diagram of ternary (1−x−y) Bi0.5Na0.5TiO3−x Bi0.5K0.5TiO3−yLiTaO3 (BNT−BKT−LT) ceramics was investigated within the range of x = 0–0.4 and y = 0–0.1 via analyses on their crystal structure, dielectric and field-induced strain properties. BNT-rich compositions revealed ferroelectric rhombohedral symmetry (FER: x < 0.18 and y < 0.04) while BKT modified BNT ceramics transformed into ferroelectric tetragonal symmetry (FET; x > 0.18 and y < 0.02). However, LT modification of BNT–BKT ceramics induced a phase transition to nonpolar pseudocubic symmetry (NPPC; x = 0–0.4 and y > 0.04). At phase boundaries between these three regions, the coexistence of two or three phases was observed. Interestingly, the electric field-induced strain was markedly enhanced at the ferroelectric-nonpolar phase boundary.
Journal: Current Applied Physics - Volume 11, Issue 3, Supplement, May 2011, Pages S134–S137