Table 2.

Properties of the LKNNT ceramics with compositions LxTay at 25 ${}^{°}$C, including the compliances s${}_{11}$ and s${}_{12}$, their sum s${}_{11}$ + s${}_{12}$, the piezoelectric coefficients d${}_{31}$, the dielectric permittivity ${\epsilon }_{33}$ and the relative density ${\rho }_{\mathrm{rel}}$, in units of 10${}^{-12}$ m${}^2$/N, 10${}^{-12}$ C/N and ${\epsilon }_0$(vacuum permittivity), respectively.

Composition	s${}_{11}(\pm 0.8)$	s${}_{12}(\pm 0.3)$	s${}_{11}$ + s${}_{12}(\pm 0.9)$	d${}_{31}(\pm 9.0)$	${\mathit{\epsilon }}_{33}(\pm 110)$	${\mathit{\rho }}_{\mathbf{rel}}(\pm 1.2)$
L3.0Ta15	9.7	−3.1	6.6	−51.3	1307	93.5
L3.0Ta20	14.6	−4.7	10.0	−80.9	1281	90.7
L3.0Ta25	10.6	−3.4	7.2	−56.8	1378	91.1
L3.5Ta15	9.6	−3.1	6.5	−46.8	862	93.3
L3.5Ta20	13.9	−4.5	9.5	−6.1	1309	93.3
L3.5Ta25	11.6	−3.7	7.9	−73.8	1130	92.1
L4.0Ta15	11.4	−3.6	7.7	−68.6	717	94.5
L4.0Ta20	12.0	−3.9	8.2	−95.0	1248	96.4
L4.0Ta25	11.8	−3.8	8.0	−75.2	919	92.3