0.97(Na
0.5-xLi
xK
0.5)(Nb
0.89Sb
0.11)O
3-0.03CaZrO
3 [(N
0.5-xL
xK)(NS)-CZ] piezoceramic (
x = 0.325) has a pseudocubic-tetragonal-orthorhombic (PC-T-O) multi-structure. The PC structure formed in this piezoceramic was identified as the
R3m rhombohedral structure. This piezoceramic showed the large piezoelectric charge constant (
d33) of 515 pC/N due to the PC-T-O multi-structure. The NaNbO
3 (NN) templates were used to texture the (N
0.5-xL
xK)(NS)-CZ thick films along the (001) direction, and the textured thick film (
x = 0.0375) had a large Lotgering factor of 95.6%. The PC-T-O multi-structure was observed in this thick film (
x = 0.0375), but the thick film (
x = 0.0325) showed a PC-O structure owing to the diffusion of the NN templates into the thick film. The textured thick film (
x = 0.0375) exhibited an increased
d33 of 625 pC/N because of the PC-T-O multi-structure and the lineup of grains along the [001] direction. A textured thick film (
x = 0.0375) was used to fabricate a planar-type actuator to confirm its applicability to electrical devices. This actuator exhibits large acceleration (580.3 G) and displacement (150 μm) at a low electric field of 0.2 kV/mm with a short response time of 3.0 ms. Therefore, the (N
0.5-xL
xK)(NS)-CZ thick films are excellent lead-free piezoceramics.
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