Large electrostrain near the phase transition temperature of (Bi0.5Na0.5)TiO3-SrTiO3 ferroelectric ceramics
Large electrostrain near the phase transition temperature of (Bi0.5Na0.5)TiO3-SrTiO3 ferroelectric ceramics
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DOI：
10.1063/1.2955533
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发表时间：
2008-06-30
影响因子：
4
通讯作者：
Takenaka, Tadashi
中科院分区：
文献类型：
--
作者：
Hiruma, Yuji;Imai, Yoshitaka;Takenaka, Tadashi
(1-x)(Bi(0.5)Na(0.5))TiO(3)-xSrTiO(3)(缩写为BNST100x)是通过传统陶瓷制备工艺制备的。根据介电和压电特性的温度依赖性确定去极化温度T(d)、菱面体-四方相变温度T(R-T)和最大介电常数温度T(m)。结果表明，BNST100x在x=0.26-0.28处形成菱形铁电体和赝立方（四方）顺电体的同形相界，并且在x=0.28处获得了分别为0.29%和488 pm/V的非常大应变和归一化应变d(33)*。此外，还明确了 T(R-T) (>= T(d)) 和 T(m) 之间的中间相表现出松弛行为。 (c) 2008 年美国物理研究所。
(1-x)(Bi(0.5)Na(0.5))TiO(3)-xSrTiO(3) (abbreviated as BNST100x) was prepared by a conventional ceramic fabrication process. The depolarization temperature T(d), rhombohedral-tetragonal phase transition temperature T(R-T), and the temperature T(m) of the maximum dielectric constant were determined from the temperature dependence of the dielectric and piezoelectric properties. It is revealed that BNST100x forms a morphotropic phase boundary of rhombohedral ferroelectric and pseudocubic (tetragonal) paraelectric at x=0.26-0.28 for BNST100x, and a very large strain and normalized strain d(33)* of 0.29% and 488 pm/V, respectively, were obtained at x=0.28. In addition, it was clarified that the intermediate phase between T(R-T) (>= T(d)) and T(m) shows relaxor behavior. (c) 2008 American Institute of Physics.