The
Main characteristics of Piezoelectric Ceramic Materials
Produced by Hong Kong Piezo Company Limited
Parameters
Symbols
Unit
Materials
P-41
P--81
P--83
P--85
P--45
P--43
P--51
PMgN--51
PSN--51
PT--71
Plis--51
PT--72
Relative
dielectric constant
ε33/ε0
1250
1000
1000
1700
1650
1500
2350
3800
1600
190
2000
330
Dielectric
loss
tgδ
10-4
50
50
80
50
50
50
190
180
200
120
200
120
Electro
mechanical coupling coefficient
Kp
0.50
0.53
0.49
0.58
0.60
0.58
0.62
0.63
0.60
0.04
0.65
0.02
K31
0.34
0.30
0.28
0.35
0.35
0.34
0.35
0.37
0.33
0.38
K33
0.68
0.60
0.58
0.60
0.68
0.70
0.73
0.71
0.69
0.46
0.71
0.45
Kt
0.48
0.45
0.42
0.40
0.45
0.47
0.51
0.53
0.50
0.45
0.55
0.45
Piezoelectric
strain constant
d31
10-12c/N
100
90
90
180
140
130
185
270
150
200
d33
10-12c/N
200
220
195
390
300
350
500
650
400
50
550
68
Piezoelectric
voltage constant
g31
10-3Vm/N
11.5
11.2
9.2
11.2
10.5
10.5
10.0
10.0
12.0
17.4
g33
10-3Vm/N
18.1
24.8
22
25.9
20.5
26.4
24
19.3
28.2
29.7
31.1
23.3
Acoustic
speed
V4
Hz.m
3300
3500
3500
3500
3300
3400
2450
3000
3100
3850
3100
3800
V1
Hz.m
3300
3400
3400
3400
3100
3200
2900
2900
2950
2950
V3
Hz.m
3900
3900
3920
4000
3790
3700
3600
3600
3650
4960
3850
4000
Vt
Hz.m
4560
4560
4500
4100
4300
3930
3850
4000
4100
4500
4100
Elastic
compliance constant
S11E
10-12m2/N
12.0
11.1
11.1
12.0
13.0
11.5
13.5
13.0
15.4
7.9
15.9
8.0
Poisson
ratio
б
0.3
0.3
0.3
0.3
0.33
0.33
0.36
0.36
0.35
0.36
Mechanical
quality factor
Qm
600
800
450
2000
400
400
80
70
90
550
90
500
Curie
temperature
Tc
℃
320
300
305
300
340
360
260
280
269
470
300
420
Density
ρ
103kg/m3
7.5
7.5
7.5
7.5
7.5
7.5
7.6
7.6
7.5
7.5
7.5
7.5
Copyright
by Hong Kong Piezo Co Ltd. 2003
Address: Flat 15, 9/F., Block A, Veristrong Industrial Centre,
34-36 Au Pui Wan Street, Fo Tan, N.T., Hong Kong.