1. Enhancing electrical properties in KNN based high-entropy piezoelectric ceramics by optimizing sintering temperature.
- Author
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Luan, Zhaohui, Wang, Xueyuan, Wang, Bingsen, Wang, Junjun, and Yang, Wenlong
- Subjects
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PIEZOELECTRIC ceramics , *DIELECTRIC properties , *PERMITTIVITY , *PIEZOELECTRICITY , *FERROELECTRICITY , *CERAMICS - Abstract
The development of high electrical performance (K,Na)NbO3 (KNN)-based piezoelectric ceramics is critical in environmental protection. In this study, (K0.5Na0.5)(Ti0.2Zr0.2Nb0.2Ta0.2Sb0.2)O3 high-entropy ceramics were synthesized via the solid solution method by different sintering temperature. The piezoelectric, dielectric and ferroelectric properties of (K0.5Na0.5)(Ti0.2Zr0.2Nb0.2Ta0.2Sb0.2)O3 ceramics were studied. The sample sintered at 990 °C has the best dielectric property, and the dielectric constant is stable in a wide temperature region. The sample sintered at 980 °C have the highest porcelain forming property, the residual polarization intensity is 0.0792 μC/cm2, the activation energies obtained is 0.40 eV. The results confirm that the calcined at 980 °C (K0.5Na0.5)(Ti0.2Zr0.2Nb0.2Ta0.2Sb0.2)O3 ceramics is feasible in the field of electrical application. This work proves a design idea to obtain high electrical performance in KNN-based high-entropy ceramics via composition design by optimizing sintering temperature. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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