التفاصيل البيبلوغرافية
| العنوان: |
Achieving well-balanced performance of d33 and Td in unmodified morphotropic phase boundary BNKT20 ceramics by optimizing phase structure. |
| المؤلفون: |
Fu, Jinxin, Zhou, Changrong, Chen, Jun, Yu, Dongyan, Wu, Di, Li, Qingning, Yuan, Changlai, Xu, Jiwen, Rao, Guanghui |
| المصدر: |
Journal of Materials Science: Materials in Electronics; Dec2024, Vol. 35 Issue 36, p1-9, 9p |
| مستخلص: |
The incompatibility of the large piezoelectric response (d33) and high depolarization temperature (Td) in lead-free piezoelectric ceramics limited their practical applications. The most used modification methods for improving d33 or Td commonly required a delicate control of complex compositions. Here, a strategy for simply changing the sintering temperature is used to defer the Td and increase d33 simultaneously. The Td and d33 of unmodified Bi0.5Na0.5TiO3-0.2Bi0.5K0.5TiO3 (BNKT20) ceramics increase with increasing sintering temperature until both of them reach the maximum (d33 ~ 174pC/N, Td ~ 177 °C) at the sintering temperature of 1100 °C. In-depth analysis unveils the critical role of multiphase coexistence and oxygen vacancies in enhancing Td by optimizing sintering temperature. Meanwhile, increasing sintering temperature promotes large grain size with easy domain orientation, thus, yielding the improved d33. This work provides a simple and effective method to broaden the working range of Bi0.5Na0.5TiO3-based (BNT) piezoelectric ceramics at high temperature under the premise of realizing high piezoelectric properties. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |