A superior piezoelectric coefficient (d = 570 ± 10 pC N ), the highest value reported to date in potassium-sodium niobate-based ceramics, is obtained in (1-x-y)K Na Nb Sb O BaZrO - Bi K HfO ceramics. This high d value can be ascribed to the co-existence of "nano-scale strain domains" (1-2 nm) and a high density of ferroelectric domain boundaries. Therefore, ternary KNN-based ceramics demonstrate the potential for applications.

The structural origin of enhanced piezoelectric performance and stability in KNN-based ceramics can be attributed to the hierarchical nanodomain architecture with phase coexistence.

A review of the newly emerging “new phase boundary” in potassium sodium niobate-based ceramics with high performance.

Unveiling the physical mechanisms of high performance in potassium sodium niobate-based ceramics from diffused multi-phase coexistence and a single domain feature.

A systematic review summarizing and analyzing the role of recently observed nano-domains and polar nanoregions (PNRs) in lead-free piezoceramics.

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The effects of phase, domain and grain size on the strain properties of KNN-based ceramics were investigated.

Enhancement in energy-storage performance with a recoverable energy density of 2.42 J cm−3 in {Bi0.5[(Na0.8K0.2)0.90Li0.10]0.5}0.96Sr0.04(Ti0.975Ta0.025)O3 ceramics by a hot-pressed sintering (HPS) method.