Energy storage properties in Nd-doped AgNbTaO3 lead-free antiferroelectric ceramics with Nb-site vacancies
It is crucial to discover lead-free materials with ultrahigh recoverable energy density ([Formula: see text][Formula: see text]) that can be employed in future pulse power capacitors. In this work, a high [Formula: see text][Formula: see text]of 4.51 J/cm3 was successfully obtained in lead-free Nd-d...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
World Scientific Publishing
2023-02-01
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| Series: | Journal of Advanced Dielectrics |
| Subjects: | |
| Online Access: | https://www.worldscientific.com/doi/10.1142/S2010135X22420061 |
| Summary: | It is crucial to discover lead-free materials with ultrahigh recoverable energy density ([Formula: see text][Formula: see text]) that can be employed in future pulse power capacitors. In this work, a high [Formula: see text][Formula: see text]of 4.51 J/cm3 was successfully obtained in lead-free Nd-doped AgNb[Formula: see text]Ta[Formula: see text]O3 antiferroelectric ceramics at an applied electric field of 290 kV/cm. It is discovered that Nd doping paired with Nb-site vacancies could stabilize the antiferroelectric phase by lowering the temperatures of the M1–M2 and M2–M3 phase transitions, which leads to higher energy storage efficiency. Furthermore, Nd and Ta co-doping will contribute to the electrical homogeneity and low electrical conductivity, resulting in large breakdown strengths. Aliovalent doping in Ag-site with Nb-site vacancies serves as a novel strategy for the construction of AgNbO3-based ceramics with excellent energy storage performance. |
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| ISSN: | 2010-135X 2010-1368 |