Simultaneously enhanced piezoelectric response and piezoelectric voltage coefficient in textured KNN ‐based ceramics

<001> ‐textured 0.99(K 0.49 Na 0.49 Li 0.02 )(Nb 0.97‐ x S b 0.03 Ta x )O 3 ‐0.01CaZrO 3 [abbreviated as 0.99 KNLN 0.97‐ x ST x ‐0.01 CZ , x = 0.03, 0.07, 0.10, 0.15, 0.20, 0.25] ceramics were prepared by templated grain growth ( TGG ) method and a two‐step sintering process. Giant longitudinal piezoelectric coefficient d 33 (391 pC /N) and piezoelectric strain coefficient d 33 * (630 pm/V under an AC E‐field of 20 kV /cm) can be obtained in the textured ceramics with x = 0.25. All textured ceramics display superior k p (>54%) and g 33 (>23 × 10 −3 Vm/N) which are in an order of magnitude with PZT ceramics. The maximum value of k p (~63.3%) obtained in textured ceramics with x = 0.15 is higher than that of famous textured LF 4 ceramics. Excellent comprehensive properties suggest that <001> ‐textured 0.99 KNLN 0.97‐ x ST x ‐0.01 CZ ceramics are promising candidates in the field of lead‐free piezoelectric materials.