Abstract
Abstract<001> ‐textured 0.99(K0.49Na0.49Li0.02)(Nb0.97‐xSb0.03Tax)O3‐0.01CaZrO3 [abbreviated as 0.99KNLN0.97‐xSTx‐0.01CZ, 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 d33 (391 pC/N) and piezoelectric strain coefficient d33* (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 kp (>54%) and g33 (>23 × 10−3 Vm/N) which are in an order of magnitude with PZT ceramics. The maximum value of kp (~63.3%) obtained in textured ceramics with x = 0.15 is higher than that of famous textured LF4 ceramics. Excellent comprehensive properties suggest that <001> ‐textured 0.99KNLN0.97‐xSTx‐0.01CZ ceramics are promising candidates in the field of lead‐free piezoelectric materials.
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