科鳴股份有限公司

Material:	840	841	850	855	856	880
Relative Dielectric Constant
K^T	1250	1350	1750	3300	4100	1000
Dielectric Dissipation Factor (Dielectric Loss (%)*
tan	0.4	0.35	1.4	1.3	2.7	0.35
Curie Point (°C)**
T_c	325	320	360	250	150	310
Electromechanical Coupling Factor (%)
k_p	0.59	0.60	0.63	0.68	0.65	0.50
k₃₃	0.72	0.68	0.72	0.76	0.73	0.62
k₃₁	0.35	0.33	0.36	0.40	0.36	0.30
k₁₅	0.70	0.67	0.68	0.66	0.65	0.55
Piezoelectric Charge Constant (10^-12 C/N or 10^-12 m/V)
d₃₃	290	300	400	630	620	215
-d₃₁	125	109	175	276	260	95
d₁₅	480	450	590	720	710	330
Piezoelectric Voltage Constant (10^-3 Vm/N or 10^-3 m²/C)
g₃₃	26.5	25.5	26	21.0	18.5	25
-g₃₁	11	10.5	12.4	9.0	8.1	10
g₁₅	38	35	36	27	25	28
Young's Modulus (10¹⁰ N/m²)
Y^E₁₁	8	7.6	6.3	5.9	5.8	9
Y^E₃₃	6.8	6.3	5.4	5.1	4.5	7.2
*Frequency Constants (Hz_m or m/s)**
N_L (longitudinal)	1524	1700	1500	1390	---	1725
N_T (thickness)	2005	2005	2032	2079	1980	2110
N_P (planar)	2130	2055	1980	1920	---	2120
Density (g/cm³)
	7.6	7.6	7.7	7.7	7.5	7.6
Mechanical Quality Factor
Q_m	500	1400	80	65	72	1000

Physical and Piezoelectric Properties of APCI Materials