HIGHLIGHTS
SUMMARY
When a considerable number of dopants are introduced in the Na0.5Bi0.5TiO3 (BNT) lattice, a strain curve with asymmetric loops (Fig 1b) is discovered in the dopant-induced BNT-based piezoelectric ceramics. When an electric field is first applied, the nanoscale polar region of the rhombohedral phase in BNT increase to a distinct mesoscale domain, and the domain switches along the direction of the electric field. Fabrication of BNT piezoelectric ceramics Based above atomic-scale defect engineering and mesoscale-domain analysis, the authors fabricate two types of BNT piezoelectric ceramics, BNT-1 and . . .
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