fig1

High entropy design: a new pathway to promote the piezoelectricity and dielectric energy storage in perovskite oxides

Figure 1. (A) Contour map of the distribution of polarization angles (θ). (B) Statistics of the distribution of θ in the range of 0°-45°, extracted from over 30, 000 polarization vectors. (C) Strong correlation between d33 and the number of B-site element types (nB) for a series of PbBO3-based solid solutions. Reproduced with permission from[17], Copyright 2022, Elsevier. (D) Atomic-resolution high-angle annular dark field - scanning transmission electron microscopy (HAADF STEM) polarization vector image along [110]c. (E) Comparison of the recoverable energy storage density, Wrec (efficiency, η ≥ 90%), of (K,Na)NbO3 (KNN)-based high-entropy ceramic with other representative lead-free bulk ceramics with Wrec ≥ 1 J cm-3. Reproduced with permission from[18], Copyright 2022, Nature Publishing Group.

Microstructures
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