PIEZOELECTRIC COMPOSITIONS AND PIEZOCERAMIC COMPONENTS
PIEZOELECTRIC COMPOSITIONS
Centre for Materials for Electronics Technology (C-MET) , Thrissur has developed the following piezoceramic compositions which are engineered for enhanced electromechanical properties. Different standard compositions, as shown below are available. C-MET also has the capability for custom-made Piezoelectic compositions to suit the requirement of a particular application.
Standard Piezoelectric compositions
|
Sl No |
Product |
Code |
|
1 |
Piezoelectic composition |
PZT-H1 |
|
2 |
Piezoelectic composition |
PZT-H2 |
|
3 |
Piezoelectic composition |
PZT-S1 |
|
4 |
Piezoelectic composition |
PZT-S2 |
The important properties of standard piezoceramics offered by C-MET are given in Table 1 given below.
Table 1 Specifications of Standard Piezoelectric Compositions
|
Electrical Characteristics
|
PZT-H1
|
PZT-H2
|
PZT-S1
|
PZT-S2 |
||
|
1 |
Dielectric Permittivity ,er
|
1430 |
1120 |
1743 |
2682 |
|
|
2 |
Dielectric loss ,tan d
|
0.003 |
0.002 |
0.02 |
0.02 |
|
|
3 |
Piezoelectric Coefft.d33(pC/N)
|
355 |
328 |
456 |
630 |
|
|
4 |
Electromechanical coupling factor ( kp)
|
0.59 |
0.58 |
0.64 |
0.65 |
|
|
5 |
Mechanical quality factor Qm
|
685 |
900 |
72 |
70 |
|
|
6 |
Density (gm./cc)
|
7.6 |
7.6 |
7.7 |
7.6 |
|
|
7 |
Frequency constant,N Hz.-m
|
2083 |
2100 |
1900 |
1975 |
|
|
8 |
Curie Point, Tc(0C) |
330 |
330 |
360 |
272 |
|
PIEZOCERAMIC COMPONENTS
C-MET has the capability to fabricate Components of various shapes. Quality system ISO 9001: 2008 is in place to ensure reproducibility and traceability. Typical dimensions and some of the important properties of piezoceramic components offered by C-MET are given in Table 2.
Piezoceramic Components – PZT Rings, PZT Plate and PZT Discs
Advantages
- Lower sintering temperature
- High-density microstructures
- Enhanced electromechanical properties
- Improved Insulation Resistance(IR) in Components
Table 2. Specifications of Piezoceramic Components
|
Piezoceramic component |
Typical dimensions |
Electrical Characteristics |
|||||
|
C(nF) |
tan δ |
d33 (pC/N) |
fr (KHz) |
keff |
IR (GΩ) |
||
|
PZT Ring |
OD = 50.00±0.05mm ID = 38.00±0.10mm t = 8.00 ±0.08mm
|
1.15±0.04 |
0.002 |
325±25 |
179±1 |
0.58±0.02 |
150±25 (1000V DC) |
|
PZT Disc
|
Dia = 15.04±0.06mm T = 0.28 mm
|
10.50±0.50 |
0.02 |
520±20 |
135±1 |
0.65±0.02 |
20 (100V DC) |
|
PZT Disc
|
Dia = 24.70±0.20mm T = 1.03±0.03mm
|
10.0±1.0 |
0.02 |
575±30 |
81.75±0.75 |
0.56±0.02 |
20 (100V DC) |
|
PZT Plate
|
Length = 40.00± 0.03 Width = 19.94±0.02 Thk = 5.00 ±0.01 |
1.60±0.07 |
0.002 |
275±50 |
394±2 |
0.58±0.02 |
110±10 (1000 V DC)
|