In our previous work,[00l]-oriented 0.7BFBT textured ceramic (0.7BFBT-T) was prepared successfully,but its d_(3)_(3) value did not increase obviously using the conventional method. In this work,the hidden piezoelectri...In our previous work,[00l]-oriented 0.7BFBT textured ceramic (0.7BFBT-T) was prepared successfully,but its d_(3)_(3) value did not increase obviously using the conventional method. In this work,the hidden piezoelectric properties of 0.7BFBT-T emerged after quenching. A suitable quenching temperature (800℃,T-Q8) increased the content of the rhombohedral phase,leading to a highly distorted structure and magnification of the dipole moment,which was beneficial for enhancement of the polarity. Furthermore,oxygen vacancies were inhibited with increasing quenching temperature,and the domains tended to become larger and more ordered due to the reduced pinning effect. Consequently,a 33% enhancement in the d_(3)_(3) value as well as a T_(c) of 461℃ were observed in T-Q8.展开更多
基金supported by the National Natural Science Foundation of China(Grant No.52032007 and 51772211)the Natural Science Foundation of Xinjiang Uygur Autonomous Region(No.2019D01B09)the Tianshan Youth Program of Xinjiang Uygur Autonomous Region(No.2019Q023).
文摘In our previous work,[00l]-oriented 0.7BFBT textured ceramic (0.7BFBT-T) was prepared successfully,but its d_(3)_(3) value did not increase obviously using the conventional method. In this work,the hidden piezoelectric properties of 0.7BFBT-T emerged after quenching. A suitable quenching temperature (800℃,T-Q8) increased the content of the rhombohedral phase,leading to a highly distorted structure and magnification of the dipole moment,which was beneficial for enhancement of the polarity. Furthermore,oxygen vacancies were inhibited with increasing quenching temperature,and the domains tended to become larger and more ordered due to the reduced pinning effect. Consequently,a 33% enhancement in the d_(3)_(3) value as well as a T_(c) of 461℃ were observed in T-Q8.
