High-stability materials with reduced and increased permittivity and different values of electromechanical coupling coefficient of planar mode oscillations are designed for SAW and bulk wave frequency selection devices of planar mode, thickness tension-compression mode and thickness shear mode (filters, resonators, gyroscopes, delay lines).
ESSENTIAL CHARACTERISTICS
Characteristics
Unit
PZT-38
PZT-39
PZT-40
PZT-35
PZT-35y
PZT-33
PZT-22
Tk
°C
330
290
240
300
290
400
320
εt33/ε0
-
460
720
1350
1200
800
450
600
εt11/ε0
-
-
-
-
1200
1050
470
620
tg δ, max
–
1.0
1.0
1.0
2,0
2,0
0.4
2.0
Qm
-
1700
1150
600
700
650
1900
650
vE1
103m/s
3.80
3.6
3.45
3.45
3.5
3.8
3.8
σp
-
0.31
0.33
0.35
0.34
0.32
0.30
0.29
kp
-
0.30
0.38
0.48
0.55
0.48
0.26
0.22
k15
-
-
-
-
0.58
0.60
0.35
0.3
k33
-
-
-
-
0.65
0.64
0.38
0.42
d31
10-12C/N
-40
-60
-80
-110
-90
-28
-32
d33
10-12C/N
70
100
150
250
220
71
104
d15
10-12C/N
-
-
-
-
-
107
117
g31
10-3V*m/N
-9,8
-
-
-
-12.7
-7.0
-6.0
g33
10-3V*m/N
17.2
-
-
-
31,0
17,8
19.6
(RFD)p
%
0.20
0.25
0,40
0.20
1,0
0.40
0.25
(RFD)sh
%
-
-
-
0.5
-
0.40
0.35
(RFD)c
%
-
-
0,40
0.5
0.5
0.40
0.22
Top
°C
85
85
85
85
85
85
85
ρv
At 100°C, 108, Ω*m
1
1
1
-
-
1
-
ρ
103kg/m3
7.5
7.5
7.5
7.9
7.5
7.9
7.5
Notation Conventions
Tk
Curie point
εt33/ε0 εt11/ε0
Relative Permittivity
tg δ
Dielectric losses in weak fields (E=25 kV/m)
Qm
Mechanical Q
v1E
Sound velocity
σp
Planar Poisson coefficient
d31, d33, d15
Piezoelectric Modules
g31, g33
Electrical constants on a voltage (Sensitivity in a mode of reception);
Top
Recommended operating temperature
ρv
Electrical volume resistivity
ρ
Density
Electro-mechanical coupling coefficients
kp
Planar mode
k15
Shear mode
k33
Thickness tension-compression mode
(RDF)p
Relative deviation of frequency Planar mode
(RDF)sh
Relative deviation of frequency Shear mode
(RDF)c
Relative deviation of frequency Thickness tension-compression mode
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