Table II.

Elastic Compliance s_ij (10⁻¹² m²/N) and Elastic Stiffness c_ij (10¹⁰ N/m²) Constants for KNN-KCN Ceramic and Compared with Hard PZTs.

Material	$s_{11}^E$	$s_{12}^E$	$s_{13}^E$	$s_{33}^E$	$s_{44}^E$	$s_{66}^E$	$s_{11}^D$	$s_{12}^D$	$s_{13}^D$	$s_{33}^D$	$s_{44}^D$	$s_{66}^D$
KNN-KCN	8.6	−2.6	−2.1	9.3	22.0	22.3	8.2	−3.0	−1.0	6.4	17.5	22.3
PZT4	12.3	−4.1	−5.2	15.5	39.0	32.7	10.9	−5.4	−2.1	7.9	19.3	32.7
PZT8	11.5	−3.4	−4.8	13.5	31.9	29.8	10.4	−4.4	−2.3	8.0	22.6	29.8
Material	$c_{11}^E$	$c_{12}^E$	$c_{13}^E$	$c_{33}^E$	$c_{44}^E$	$c_{66}^E$	$c_{11}^D$	$c_{12}^D$	$c_{13}^D$	$c_{33}^D$	$c_{44}^D$	$c_{66}^D$
KNN-KCN	14.6	5.6	4.7	12.9	4.6	4.5	14.8	5.9	3.6	17.2	5.7	4.5
PZT4	13.9	7.6	7.1	11.5	2.6	3.1	14.5	8.0	5.7	15.9	5.2	3.1
PZT8	13.7	7.2	7.5	12.3	3.1	3.4	14.0	7.5	6.4	16.1	4.4	3.4