Electric-field-induced volume change and room temperature phase stability of (Bi1/2Na1/2)TiO3-x mol. % BaTiO3 piezoceramics
Electric-field-induced volume change and room temperature phase stability of (Bi1/2Na1/2)TiO3-x mol. % BaTiO3 piezoceramics
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DOI：
10.1063/1.3615675
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发表时间：
2011-07
影响因子：
4
通讯作者：
W. Jo;J. Rödel
中科院分区：
文献类型：
--
作者：
W. Jo;J. Rödel
通过测量双极极化循环过程中的体积变化，研究了（1 − x）（Bi 1/2Na 1/2）TiO 3-xBaTiO 3（0 ≤ x ≤ 0.15）在电场作用下的相稳定性。通过使用商业软PZT和弛豫PLZT的比较研究，揭示了具有三个不同区域的场依赖性相稳定性的独特性质。当x ≤ 0.06和x ≥ 0.13时，与PZT和PLZT类似，轴向应变随径向应变的收缩而膨胀，但前者导致了一个表现出电场诱导相变的增强体积。对于0.08 ≤ x ≤ 0.12，这种场致相变的特点是可以忽略的径向收缩，这意味着极化旋转。在x = 0.07处形成“极化诱导的”准同型相界。
Phase stability of (1 − x) (Bi1/2Na1/2)TiO3-x BaTiO3 (0 ≤ x ≤ 0.15) under electric field was investigated by measuring volume changes during a bipolar poling cycle. The unique nature of field-dependent phase stability with three distinctive regions is revealed by comparative studies using commercial soft PZT and relaxor PLZT. For x ≤ 0.06 and x ≥ 0.13, similarly with PZT and PLZT, the axial strain expands with the contracting radial strain, but the former results in a remanent volume demonstrating an electric-field-induced phase transition. For 0.08 ≤ x ≤ 0.12, this field-induced phase transition is distinguished by negligible radial contractions implying polarization rotation. A “poling-induced” morphotropic phase boundary forms at x = 0.07.