Electromechanical Properties  
Symbols		 Materials Unit
BaTiO3 TPC-33 TPC-44 TPC-51 TPC-81 Tolerance  
Density ρ 5.6 7.70 7.50 7.45 7.45 ³ *103Kg/m3
Curie Temperature Tc 110 345 300 260 300 ³ ℃
 
Electromechanical
Coupling Factor		 Kp 0.34 0.63 0.60 0.63 0.53  
 
±6.0%		  
K31 0.19 0.36 0.34 0.36 0.32
K33 0.43 0.73 0.70 0.73 0.63
K15 0.45 0.71 0.68 0.68 0.65
Kt 0.32 0.49 0.48 0.51 0.47
 
Elastic Constant		 SE11 8.4 15.8 13.0 15 11.0  
±1.0%		 *10-12
m2/N
SD33 5.3 9.3 8.4 9.0 8.4
 
Piezoelectric Constant		 d31 60 -190 -150 -210 -100  
±15%		 *10-12
m/v or C/N
d33 160 450 320 440 235
d15 190 480 520 710 440
Dielectric Constant@1KHz εTr3 1550 1850 1320 2100 1020 ±15%  
εTr1 1600 1930 1880 2300 1450
Mechanical Quality Factor Qm 1300 90 400 70 800 ³  
Dielectric Loss Factor tanδ 0.5 1.7 0.5 2.0 0.4 £ %
 
Frequency Constant		 Nd   1990 2200 2000 2300  
 
±5%		  
 
Hz.m
N1 3180 1470 1650 1500 1700
N3 2280 1880 2000 1900 1960
N5   1130 1260 1200 1260
Nt   2250 2300 2250 2280
 
 
Sound Speed		 Vd 4800 3000 3300 3000 3500  
 
±5%		  
 
M/s
V1   2940 3200 2900 3400
V3   3760 4000 3850 3900
V5   2260 2480 2400 2480
Vt 5350 4500 4600 4450 4560
Aging Rate change per time decade ANd   0.76 1.22 0.33 1.28   %
AKp   -0.25 -1.9 -0.44 -2.5  
Aε   -0.28 -4.0 -1.52 -4.0  
Note: Exceptρ.Tc all the values in the table are measured at the tenth day after polarization.
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