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Enhanced insulating and piezoelectric properties of 0.7BiFeO3–0.3BaTiO3 lead-free ceramics by optimizing calcination temperature: analysis of Bi3+ volatilization and phase structures
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2018-03-06 00:00:00 , DOI: 10.1039/c8tc00329g Shuai Cheng 1, 2, 3, 4, 5 , Bo-Ping Zhang 1, 2, 3, 4, 5 , Lei Zhao 1, 2, 3, 4, 5 , Kai-Kun Wang 1, 2, 3, 4, 5
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2018-03-06 00:00:00 , DOI: 10.1039/c8tc00329g Shuai Cheng 1, 2, 3, 4, 5 , Bo-Ping Zhang 1, 2, 3, 4, 5 , Lei Zhao 1, 2, 3, 4, 5 , Kai-Kun Wang 1, 2, 3, 4, 5
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Herein, we report the significantly enhanced insulating and piezoelectric properties of a lead-free ceramic in a simple composition of 0.7BiFeO3–0.3BaTiO3 (0.7BF–0.3BT) without any addition of MnO2 or other dopants, which is derived by fine-tuning the calcination temperature (Tcal = 760 °C, 780 °C, 800 °C, 820 °C and 850 °C). All the calcined powders have a main perovskite phase with R3c symmetry and a small amount of Bi25FeO40 impurity, whose ceramics become a typical R3m and PC coexisting structure at 760 °C ≤ Tcal ≤ 820 °C, and a single PC phase at Tcal = 850 °C. Tcal is crucial to optimize the volatilization, density and phase structure including perovskite symmetry and impurity phase, thereby enhancing the insulating properties and piezoelectric properties. Benefitting from weak Bi3+ volatilization, low number of 
, a dense microstructure and appropriate CR/CPC ratio at Tcal = 800 °C, the enhanced insulating and piezoelectric properties of 0.7BF–0.3BT lead-free ceramics are achieved, whose d33 = 210 pC N−1, kp = 0.34, TC = 507 °C, Pr = 40.6 μC cm−2, and EC = 16.4 kV cm−1.
中文翻译：
通过优化煅烧温度 提高0.7BiFeO 3 –0.3BaTiO 3无铅陶瓷的绝缘和压电性能：Bi 3+挥发和相结构分析
在此，我们报道了在不添加任何MnO 2或其他掺杂剂的情况下，由0.7BiFeO 3 –0.3BaTiO 3（0.7BF–0.3BT）组成的简单组成中，无铅陶瓷的绝缘和压电性能得到了显着提高，这是由于微调煅烧温度（T cal = 760°C，780°C，800°C，820°C和850°C）。所有的煅烧粉末具有与主钙钛矿相- [R 3 Ç对称性和少量的Bi 25的FeO 40杂质，其陶瓷成为典型的- [R 3米，在760°C≤和PC共存结构Ť CAL≤820°C，并且在T cal = 850°C时有一个PC相。T cal对于优化挥发，密度和相结构（包括钙钛矿对称性和杂质相），从而增强绝缘性能和压电性能至关重要。得益于Bi 3+的弱挥发，低的数量，致密的微观结构以及在T cal = 800°C时具有适当的C R / C PC比，0.7BF–0.3BT无铅陶瓷的绝缘和压电性能得到了增强，其d 33 = 210 pC N -1，k p = 0.34，TC = 507°C， P r = 40.6μCcm -2， E C = 16.4 kV cm -1。
更新日期：2018-03-06
, a dense microstructure and appropriate CR/CPC ratio at Tcal = 800 °C, the enhanced insulating and piezoelectric properties of 0.7BF–0.3BT lead-free ceramics are achieved, whose d33 = 210 pC N−1, kp = 0.34, TC = 507 °C, Pr = 40.6 μC cm−2, and EC = 16.4 kV cm−1.
中文翻译：
通过优化煅烧温度 提高0.7BiFeO 3 –0.3BaTiO 3无铅陶瓷的绝缘和压电性能：Bi 3+挥发和相结构分析
在此，我们报道了在不添加任何MnO 2或其他掺杂剂的情况下，由0.7BiFeO 3 –0.3BaTiO 3（0.7BF–0.3BT）组成的简单组成中，无铅陶瓷的绝缘和压电性能得到了显着提高，这是由于微调煅烧温度（T cal = 760°C，780°C，800°C，820°C和850°C）。所有的煅烧粉末具有与主钙钛矿相- [R 3 Ç对称性和少量的Bi 25的FeO 40杂质，其陶瓷成为典型的- [R 3米，在760°C≤和PC共存结构Ť CAL≤820°C，并且在T cal = 850°C时有一个PC相。T cal对于优化挥发，密度和相结构（包括钙钛矿对称性和杂质相），从而增强绝缘性能和压电性能至关重要。得益于Bi 3+的弱挥发，低的数量
，致密的微观结构以及在T cal = 800°C时具有适当的C R / C PC比，0.7BF–0.3BT无铅陶瓷的绝缘和压电性能得到了增强，其d 33 = 210 pC N -1，k p = 0.34，TC = 507°C， P r = 40.6μCcm -2， E C = 16.4 kV cm -1。
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