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Lead-Free BiFeO3-BaTiO3 Ceramics with High Curie Temperature: Fine Compositional Tuning across the Phase Boundary for High Piezoelectric Charge and Strain Coefficients
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-01-13 , DOI: 10.1021/acsami.0c20381 Bowei Xun 1 , Aizhen Song 1 , Jingru Yu 1 , Yang Yin 1 , Jing-Feng Li 2 , Bo-Ping Zhang 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-01-13 , DOI: 10.1021/acsami.0c20381 Bowei Xun 1 , Aizhen Song 1 , Jingru Yu 1 , Yang Yin 1 , Jing-Feng Li 2 , Bo-Ping Zhang 1
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BiFeO3-BaTiO3 is a promising high-temperature piezoelectric ceramic that possesses both good electromechanical properties and a Curie temperature (TC). Here, the piezoelectric charge constants (d33) and strain coefficients (d*33) of (1 – x)BiFeO3-xBaTiO3 (BF-xBT; 0.20 ≤ x ≤ 0.50) lead-free piezoelectrics were investigated at room temperature. The results showed a maximum d33 of 225 pC/N in the BF-0.30BT ceramic and a maximum d*33 of 405 pm/V in the BF-0.35BT ceramic, with TCs of 503 and 415 °C, respectively. To better understand the performance enhancement mechanisms, a phase diagram was established using the results of XRD, piezoresponse force microscopy, TEM, and electrical property measurements. The superb d33 of the BF-0.30BT ceramic arose because of its location in the optimum point in the morphotropic phase boundary, low oxygen vacancy (VO··) concentration, and domain heterogeneity. The superior d*33 of the BF-0.35BT ceramic was attributed to a weak relaxor behavior between coexisting macrodomains and polar nanoregions. The presented strategy provides guidelines for designing high-temperature BF-BT ceramics for different applications.
中文翻译：
居里温度高的无铅BiFeO 3 -BaTiO 3陶瓷：相边界上的精细组成调整，可实现高压电电荷和应变系数
的BiFeO 3 -BaTiO 3是一个有希望的高温压电陶瓷的是兼具良好的机电性质和居里温度（Ť Ç）。在此，压电电荷常数（d 33）和应变系数（d * 33）（1 - X）的BiFeO 3 - X的BaTiO 3（BF- X BT; 0.20≤ X ≤0.50）的无铅压电材料在室温调查温度。结果显示，BF-0.30BT陶瓷的最大d 33为225 pC / N，最大d *33 405点/ V在BF-0.35BT陶瓷，具有Ť Ç分别S的503和415℃。为了更好地理解性能增强机制，使用XRD，压电响应力显微镜，TEM和电性能测量的结果建立了相图。高超的d 33，因为它在同型相界，低的氧空位（最佳点位置的BF-0.30BT陶瓷站起身的V ö ··）的浓度，和域的异质性。上级d * 33BF-0.35BT陶瓷的特性归因于同时存在的大畴和极性纳米区域之间的弱弛豫行为。提出的策略为设计用于不同应用的高温BF-BT陶瓷提供了指导原则。
更新日期：2021-01-27
中文翻译：
居里温度高的无铅BiFeO 3 -BaTiO 3陶瓷：相边界上的精细组成调整，可实现高压电电荷和应变系数
的BiFeO 3 -BaTiO 3是一个有希望的高温压电陶瓷的是兼具良好的机电性质和居里温度（Ť Ç）。在此，压电电荷常数（d 33）和应变系数（d * 33）（1 - X）的BiFeO 3 - X的BaTiO 3（BF- X BT; 0.20≤ X ≤0.50）的无铅压电材料在室温调查温度。结果显示，BF-0.30BT陶瓷的最大d 33为225 pC / N，最大d *33 405点/ V在BF-0.35BT陶瓷，具有Ť Ç分别S的503和415℃。为了更好地理解性能增强机制，使用XRD，压电响应力显微镜，TEM和电性能测量的结果建立了相图。高超的d 33，因为它在同型相界，低的氧空位（最佳点位置的BF-0.30BT陶瓷站起身的V ö ··）的浓度，和域的异质性。上级d * 33BF-0.35BT陶瓷的特性归因于同时存在的大畴和极性纳米区域之间的弱弛豫行为。提出的策略为设计用于不同应用的高温BF-BT陶瓷提供了指导原则。
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