Dielectric and Piezoelectric Properties in Mn-Modified (1-x)BiFeO3-xBaTiO3 Ceramics
Dielectric and Piezoelectric Properties in Mn-Modified (1-x)BiFeO3-xBaTiO3 Ceramics
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DOI：
10.1111/j.1551-2916.2009.03313.x
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发表时间：
2009-12-01
影响因子：
3.9
通讯作者：
Eitel, Richard E.
中科院分区：
文献类型：
--
作者：
Leontsev, Serhiy O.;Eitel, Richard E.
本论文研究了体相（1-x）BiFeO_（3-x）BaTiO_（3）系统作为一种潜在的无铅压电材料。钛酸钡（BaTiO 3）与铁酸铋（BiFeO 3）的固溶体中观察到稳定钙钛矿结构和改善开关行为。采用固相法制备了不同BaTiO 3含量的样品，X射线衍射分析证实样品为纯钙钛矿相。用Mn改性BaTiO 3-BiFeO 3材料将DC电阻率提高了一至五个数量级（在室温下，对于25摩尔% BaTiO 3，7.6 × 1012对2.7 × 107中心点m），并且极化滞后测量表明在33摩尔% BaTiO 3下具有最高应变响应的“硬”铁电行为。最后，低场压电d（33）系数为116 pC/N和铁电转变温度高于450摄氏度的报告为25摩尔%的钛酸钡组合物。
In the current work, the bulk (1-x)BiFeO3-xBaTiO(3) system has been studied as a potential lead-free piezoelectric material. Barium titanate (BaTiO3) in solid solution with bismuth ferrite (BiFeO3) is observed to stabilize the perovskite structure and improve switching behavior. Samples with various content of BaTiO3 were prepared via solid-state route, and pure perovskite phase was confirmed by X-ray diffraction. Modification of the BaTiO3-BiFeO3 material with Mn improved DC resistivity by one to five orders of magnitude (7.6 x 1012 vs. 2.7 x 107 center dot m for 25 mol% BaTiO3 at room temperature) and polarization hysteresis measurements indicated "hard" ferroelectric behavior with the highest strain response at 33 mol% BaTiO3. Finally, low-field piezoelectric d(33) coefficient of 116 pC/N and ferroelectric transition temperature above 450 degrees C are reported for 25 mol% BaTiO3 composition.