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piezo disc ceramic from CoreMorrow
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Harbin Core Tomorrow(CoreMorrow for short) provides piezoelectric components, which could be widely selected in terms of shape and size to suit your application.

CoreMorrow piezoelectric ceramics (also often called ultrasonic ceramics) contains only one piezoelectric ceramic layer inside, and there is no electrode layer inside, only the electrode layer on the outer surface, unlike the multilayer piezoelectric ceramics, there are many ceramic layers and electrode layers. It could be used for cutting without destroying the single-layer ceramic corresponding to the positive and negative electrodes.

    Comparison of piezo component and multilayer piezo stack

Attributes

Piezo component

Multilayer piezo stack

Appearance

piezo element

piezo stack

Driving voltage

High(~1kV/mm)

Low(60V/150V/200V)

Displacement

small, nanometer-scale

large, micrometer-scale

Resonant frequency

100kHz~6.6MHz

50Hz~100kHz

Capacitance

nF-scale

nF~μF-scale

    Appearance and Size

Appearance

Size

piezo disc 
Note: the size depends on the material, customized size is available.

 

Disc
OD: 4~185mm
TH: 0.2~20mm


CoreMorrow Piezo Component Electrode


Standard electrode is silver. Standard electrode patterns is Solid, the cylinder inner and outer electrode, inner is positive and outer is negative. Customization patterns are as followings:



Electrode type of piezo ceramic


 

Piezo Component Withstand Voltage


 Max Driving Voltage

Material

PZT4

PZT5

PZT8

AC

360~440V/mm


200~280V/mm



360~440V/mm


DC

720~880V/mm


400~560V/mm


720~880V/mm

 

Resonant Frequency


    Plate resonant frequency

Thickness[mm]

Resonant frequency[kHz]

20

100

10

200

4

500

2

1000

1.4

1500

1

2000

0.5

4000

0.45

4700

0.3

6600

After the piezoelectric ceramics are installed in the equipment, the resonant frequency will be reduced, and the specific parameters need to be structured.


Displacement CALA.


Using the inverse piezoelectric effect, that is, applying a voltage to the piezoelectric ceramic, the piezoelectric ceramic will be deformed and displaced under the influence of the electric field.

1、Displacement cala.

Displacement of piezoelectric ceramic under the withstand voltage is about 1‰ of the length of displacement direction. For example, 1mm thick ceramic sheet has a withstand voltage of 1000V, and at 1000V, its displacement is about 1μm.

2、Plate piezo ceramic displacement cala.

U:voltage[V] , H:height of piezo ceramic[m] , E:electric field intensity[V/m] , d:piezoelectric coefficients[m/V] , W:width of piezo ceramic[m]

It can be seen from the above formula that the displacement of piezo ceramics is only related to the material and the driving voltage, and for the same material and different heights of piezo ceramic, as long as the same voltage is applied (Note: the voltage cannot exceed the voltage that it can withstand ), the resulting displacement is basically the same.
     The displacement of other shapes can also be estimated according to this calculation formula.

 

Static Voltage CALA.


When the piezoe ceramic is used as a sensor, its positive piezoelectric effect is used, that is, it is deformed by applying an external force to output electric charge.

Disc static voltage cala.:

g33:material constant,  

F:froce,  

H:Height, 

R:radius

 

Recommend Piezo Controller


    Parameter

Model

Output voltage[V]

Output power[W]

Bandwidth(-3dB)

E01/00

120V

20W

0~50KHZ

50V

20W

0~100KHZ

40V

20W

0~150KHZ

E2031

300V

18W

0~500kHz

E4011

160V

80W

0~1MHz

E2021

170V

42.5W

0~1.5MHz

E1200

35V

17.5W

0~24MHz

Roughness: Rz 5-10, Ra 0,7-1,3. 

Flatness:  +/-10µm, depends the size. 

Acoustic impedance:  radialoscillation. 

Output power:  the output power is related to the frequency of ceramic vibration and driving voltage, etc., max to 40-50W/cmon the resonant frequency point.

    PZT  Material Properties


Symbol


P-5

P-51

P-5H

P-5G

P-4

P-41

P-42

P-43

P-8

P-81

P-82

P5-3

Density  ρ (103kg/m3)

7.45

7.5

7.45

7.4

7.45

7.5

7.6

7.45 7.6 7.6 7.5 7.8

Curie Point  TC (℃)

260

340 200 380 320 300 340 340 306 320 340 420

Quality Factor  Qm

100

85 70 85 600 800 1200 400 1200 1100 1500 90

Elastic Constant SE11

15

16 13 15 12 12 11 11 11.2 11.5 11 10
Elastic Constant  SD33
9
9
4.8
5.3
6.6
6.8
6.8
7.1
7
14.9
10
13
Elastic Constant  SD55
22
23
22
25
21
21
22
22
29.4
21
20
34
Poisson Ratio  σE
0.32
0.33
0.33
0.32
0.31
0.3
0.3
0.32
0.31
0.3
0.32
0.3
Dielectric Constant  εT33
2100
1700
4500
2000
1200
1800
1400
2000
970
1500
1700
700
Dielectric Constant  εT13
2400
2500
5800
2200
1400
2000
1600
2000
1400
2000
2300
800
Dielectric Loss  tgδ%
2
2
2.3
2
0.5
0.4
0.3
0.35
0.29
0.3
0.3
1.5
Electromechanical
Coupling Factor  KP
0.62
0.78
0.65
0.65
0.58
0.6
0.6
0.65
0.52
0.6
0.58
0.55
Electromechanical
Coupling Factor  K31
0.36
0.41
0.38
0.4
0.34
0.35
0.31
0.35
0.31
0.32
0.31
0.37
Electromechanical
Coupling Factor  K33
0.7
0.78
0.65
0.65
0.58
0.6
0.6
0.65
0.52
0.6
0.58
0.68
Electromechanical
Coupling Factor  K15
0.68
0.71
0.65
0.69
0.63
0.65
0.63
0.65
0.57
0.6
0.62
0.65
Electromechanical
Coupling Factor  KT
47
0.5
0.46
0.48
0.48
0.5
0.5
0.47
0.46
0.45
0.46
0.39
Piezoelectric Charge Constant  d31×10-12C/N
185
190
186
186
100
105
101
110
90
98
90
80
Piezoelectric Charge Constant  d33×10-12C/N
400
460
670
420
340
320
330
330
232
300
280
230
Piezoelectric Charge Constant  g31×10-3vm/N

-9.5
-9
-11








Piezoelectric Charge Constant  g33×10-3vm/N

22
28
26








Piezoelectric Charge Constant  g15×10-3vm/N

32
40
31








NdHz·m
2000
2250
2110
2100
2250
2250
2200
2190
2250
2200
2300
2300
NdHz·m
1400
1450
1350
1350
1650
1690
1750
1600
1700
1650
1710
1700
NdHz·m
1900
2000
1850
1850
1950
1980
1990
1890
1950
1940
1960
1800
NdHz·m
1220
1230
1100
1100
1230
1220
1200
1210
1182
1100
1185
1200
NdHz·m
2250
2200
2200
2200
2270
2280
2200
2285
2250
2260
2270
2200

    Overview of the range of possibilities

OD (mm)

TH*(mm)


0.2

0.3

0.4

0.5

0.6

0.7

0.8

1

2

5

10

20

4

10

15

20


25


30



35



40



45




50




55





60





65






70






80






90






100






120







140









160









170









185









* Please note, that thickness depends on the size of the other dimensions as well as the material.

    Drawing
drawing of piezo disc


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Address:1F, Building I2, No.191 Xuefu Road, Nangang District, Harbin, China

Tel:0451-86268790

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