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Large Piezoelectric Strain with Superior Thermal Stability and Excellent Fatigue Resistance of Lead-Free Potassium Sodium Niobate-Based Grain Orientation-Controlled Ceramics
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-03-07 00:00:00 , DOI: 10.1021/acsami.8b01554 Yi Quan 1 , Wei Ren 1 , Gang Niu 1 , Lingyan Wang 1 , Jinyan Zhao 1 , Nan Zhang 1 , Ming Liu 1 , Zuo-Guang Ye 1, 2 , Liqiang Liu 3 , Tomoaki Karaki 3
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-03-07 00:00:00 , DOI: 10.1021/acsami.8b01554 Yi Quan 1 , Wei Ren 1 , Gang Niu 1 , Lingyan Wang 1 , Jinyan Zhao 1 , Nan Zhang 1 , Ming Liu 1 , Zuo-Guang Ye 1, 2 , Liqiang Liu 3 , Tomoaki Karaki 3
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Environment-friendly lead-free piezoelectric materials with high piezoelectric response and high stability in a wide temperature range are urgently needed for various applications. In this work, grain orientation-controlled (with a 90% ⟨001⟩c-oriented texture) (K,Na)NbO3-based ceramics with a large piezoelectric response (d33*) = 505 pm V–1 and a high Curie temperature (TC) of 247 °C have been developed. Such a high d33* value varies by less than 5% from 30 to 180 °C, showing a superior thermal stability. Furthermore, the high piezoelectricity exhibits an excellent fatigue resistance with the d33* value decreasing within only by 6% at a field of 20 kV cm–1 up to 107 cycles. These exceptional properties can be attributed to the vertical morphotropic phase boundary and the highly ⟨001⟩c-oriented textured ceramic microstructure. These results open a pathway to promote lead-free piezoelectric ceramics as a viable alternative to lead-based piezoceramics for various practical applications, such as actuators, transducers, sensors, and acoustic devices, in a wide temperature range.
中文翻译：
大型压电应变片，具有无铅铌酸钾钠基晶粒取向控制陶瓷的优异热稳定性和优异的抗疲劳性
对于各种应用，迫切需要在宽温度范围内具有高压电响应和高稳定性的环保无铅压电材料。在这项工作中，晶粒取向控制的（带有90％⟨001⟩ Ç取向纹理）（K，Na）的的NbO 3个具有大的压电响应（ -基陶瓷d 33 *）= 505点V -1和高已经开发出247°C的居里温度（T C）。如此高的d 33 *值在30至180°C之间变化小于5％，显示出优异的热稳定性。此外，d 33具有较高的压电性，具有出色的抗疲劳性*在20 kV cm –1的磁场中，直到10 7个循环，其值仅减小6％。这些优异性能可以归因于垂直型相界和高度⟨001⟩ Ç -取向织构的陶瓷微结构。这些结果为在广泛的温度范围内推广无铅压电陶瓷成为各种实际应用（例如致动器，换能器，传感器和声学设备）中基于铅的压电陶瓷的可行替代品开辟了道路。
更新日期：2018-03-07
中文翻译：
大型压电应变片，具有无铅铌酸钾钠基晶粒取向控制陶瓷的优异热稳定性和优异的抗疲劳性
对于各种应用，迫切需要在宽温度范围内具有高压电响应和高稳定性的环保无铅压电材料。在这项工作中，晶粒取向控制的（带有90％⟨001⟩ Ç取向纹理）（K，Na）的的NbO 3个具有大的压电响应（ -基陶瓷d 33 *）= 505点V -1和高已经开发出247°C的居里温度（T C）。如此高的d 33 *值在30至180°C之间变化小于5％，显示出优异的热稳定性。此外，d 33具有较高的压电性，具有出色的抗疲劳性*在20 kV cm –1的磁场中，直到10 7个循环，其值仅减小6％。这些优异性能可以归因于垂直型相界和高度⟨001⟩ Ç -取向织构的陶瓷微结构。这些结果为在广泛的温度范围内推广无铅压电陶瓷成为各种实际应用（例如致动器，换能器，传感器和声学设备）中基于铅的压电陶瓷的可行替代品开辟了道路。
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