Piezo ceramics specification

Standard product

Properties	Symbol & unit	NCE40	NCE41	NCE46 *	NCE51	NCE53	NCE55	NCE57 *	NCE59 *	NCE80
DIELECTRIC PROPERTIES (tolerances +/- 10%)
Relative Dielectric Constant	εT33 / ε0	1250	1350	1300	1850	1600	5000	1800	2900	1050
Dielectric Loss Factor	tgδ [10-4]	25	40	30	190	130	220	170	190	20
Dielectric Loss Factor at 400V/mm	tgδ [10-4]	140	200							100
ELECTROMECHANICAL PROPERTIES (tolerances +/- 5%)
Electromech. Coupling Factors*	kp	0.58	0.57	0.57	0.65	0.56	0.62	0.59