材料科学
压电
相界
陶瓷
铁电性
铁电陶瓷
磁滞
大气温度范围
相(物质)
透射电子显微镜
凝聚态物理
电介质
复合材料
光电子学
纳米技术
热力学
化学
物理
有机化学
作者
Ruzhong Zuo,He Qi,Jian Fu
摘要
A morphotropic NaNbO3-based lead-free ceramic was reported to have temperature-insensitive piezoelectric and electromechanical properties (d33 = 231 pC/N, kp = 35%, Tc = 148 °C, and low-hysteresis strain ∼0.15%) in a relatively wide temperature range. This was fundamentally ascribed to the finding of a composition-axis vertical morphotropic phase boundary in which coexisting ferroelectric phases are only compositionally driven and thermally insensitive. Both phase coexistence and nano-scaled domain morphology deserved well enhanced electrical properties, as evidenced by means of synchrotron x-ray diffraction and transmission electron microscopy. Our study suggests that the current lead-free ceramic would be a very promising piezoelectric material for actuator and sensor applications.
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