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Updated: May 15, 2025

Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides
Published on: May 29, 2018
Enhanced Energy Storage Properties of the Relaxor and Antiferroelectric Crossover Ceramic Enabled by a High Entropy
Yinghao Li1,2, Wei Xiong2,3, Xuefan Zhou1
1Powder Metallurgy Research Institute, State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China.
Abstract:
In this work, we introduce a high entropy effect in designing a relaxor ferroelectric (RFE)-antiferroelectric (AFE) crossover ceramic by incorporating a high entropy relaxor-like oxide (Pb0.25Ba0.25Sr0.25Ca0.25)TiO3 with antiferroelectric NaNbO3. The results show that the relaxor ferroelectricity of the system is enhanced with increasing NaNbO3, and when the new composition reaches the highest configurational entropy, stable energy storage properties can be achieved. This is enabled by a high breakdown strength due to the small grain size and stable slim ferroelectric hysteresis loop with high efficiency due to entropy-stabilized short-range ordered polar nanoregions (PNRs). These findings showcase the potential of this strategy for exploiting new compositions of high-performance electrostatic capacitors.
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