| Autor: |
Xiaojun Wu, Chao Wu, Diyan Yang, Jie Yin, Jiagang Wu |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Advanced Powder Materials, Vol 2, Iss 1, Pp 100079- (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2772-834X |
| DOI: |
10.1016/j.apmate.2022.100079 |
| Popis: |
Simultaneous composition and valence-dependent strain regulation is achieved in lead-free (Bi0.5Na0.4K0.1)1-2xSm2xTi1-xMnxO3 (BNKT-SM100x) ceramics by a facile co-doping design with Sm3+ and Mn2+. By simply controlling the sintering temperature, Mn ions exhibited mixed-oxidation states with different ion radius and electronic structures, further adjusting the crystalline field. The regulated disorder degree finally induced large electro-strain (0.445%) under appropriate doping contents (x = 0.01) and sintering temperature (1150 °C). Moreover, the random effect of Mn2+ (arising from the different valence and radius comparing with Ti4+) is stronger than the pinning effect due to the suppressed oxygen vacancies, and the different crystal structures may also affect the role of Mn2+. The domain morphologies with mixed nanodomain and ferroelectric domain were observed in the BNKT-SM1 ceramics, further demonstrating the coexistence of random effect and pinning effect. It is believed that the self-strain regulation phenomenon in this work may serve as an effective strategy for designing ferroelectrics with high strain performance. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
|
