التفاصيل البيبلوغرافية
| العنوان: |
Large piezoelectricity and high depolarization temperature in BiScO3–BiYbO3–PbTiO3 ceramics for energy harvesting at elevated temperatures. |
| المؤلفون: |
Zhao, Haiyan, Yu, Xiaole, Guo, Qiangqiang, Yang, Huijing, Li, Fanlin, Zhang, Suyang, Wu, Xiaoyuan |
| المصدر: |
Journal of Materials Chemistry C; 12/21/2032, Vol. 11 Issue 47, p16536-16544, 9p |
| مستخلص: |
The key challenge in the manufacture of advanced high-temperature piezoceramic energy harvesters (HT-PEHs) with excellent electromechanical conversion capability is the development of piezoceramic materials with a large piezoelectric coefficient (d33) and a high depolarization temperature (Td). Herein, a (1 − x − y)BiScO3–xBiYbO3–yPbTiO3 ((1 − x − y)BS–xBY–yPT) ternary perovskite piezoelectric system with a Curie temperature of more than 425 °C is reported. The x/y = 0.01/0.61 ceramic at the morphotropic phase boundary (MPB) displays a large high-temperature d33 value of 665 pC N−1 and a high Td of 348 °C, which are far better than the corresponding values for many existing typical Pb(Zr, Ti)O3- and BS–PT-based perovskite piezoceramics. These remarkable high-temperature piezoelectric properties can be ascribed to vertical MPB and to the improved tetragonal phase structure with its thermally stable domains. Furthermore, the HT-PEH assembled using the 0.38BS–0.01BY–0.61PT MPB specimen demonstrates an excellent power generation capacity under harsh high-temperature conditions at 200–350 °C, and the converted electrical energy can light up commercial light-emitting diodes. The above results demonstrate that (1 − x − y)BS–xBY–yPT are highly competitive potential stock materials for the preparation of PEHs that are suitable for harsh high-temperature environments. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
