| Type: | Open Ultrasonic Sensors |
|---|---|
| Output Signal Type: | Digital Type |
| Production Process: | Ceramics |
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PiezoelectricCeramics (PZT) materials are categorized as functional ceramics. In sensors they make it possible toconvert forces, pressures and accelerations into electrical signals, and in sonic and ultrasonic transducers and actuators they convert electric voltages into vibrations or deformations.PiezoelectricCeramics materials are classified according to their chemical composition on the one hand, and by the specific application conditions on the other.
Piezoelectric ceramic sheet is a kind of electroacoustic device with simple structure and light weight. It has the advantages of high sensitivity, no magnetic field spreading, no copper wire and magnet, low cost, low power consumption, convenient repair, and convenient mass production. widely used. Suitable for the transmission and reception of ultrasonic and infrasonic waves. Piezoelectric ceramics with a relatively large area can also be used to detect pressure and vibration. The working principle is to use the reversibility of the piezoelectric effect. Applying audio voltage on it can generate mechanical vibration, thereby Make some noise. If pressure is continuously applied to the piezoelectric ceramic sheet, it will also generate voltage and current.
Common piezoelectric ceramics
1. Barium titanate (BaTiO3) piezoelectric ceramics have high piezoelectric coefficient and dielectric constant, and their mechanical strength is not as good as quartz.
2. Lead magnesium niobate Pb(MgNb)O3-PbTiO3-PbZrO3 piezoelectric ceramics (PMN) have a high piezoelectric coefficient and can continue to work under pressures as high as 700kg/cm2, and can be used as a force sensor at high temperatures.
3. Lead zirconate titanate Pb (Zr•Ti) O3 piezoelectric ceramics (PZT) have high piezoelectric coefficient, and various electromechanical parameters change little with external conditions such as temperature and time. Add one or two to lead zirconate titanate Kind of trace elements, PZT materials with different properties can be obtained.
The piezoelectric ceramic ultrasonic transducer is suitable for ultrasonic welding equipment and ultrasonic cleaning equipment. It is mainly made of high-power transmitting piezoelectric ceramics. The ultrasonic transducer is a device that can convert high-frequency electrical energy into mechanical energy. As an energy conversion device, the energy device is used to convert the input electric power into mechanical power (ultrasound) and then transmit it, and it consumes a small part of the power.
In order to improve the reliability of piezoelectric ceramics, we usually use metal shell packaging to reduce the lateral force that external mechanical structures may bring to piezoelectric ceramics. However, even if piezoelectric actuators that use shell packaging are used, it is necessary to go deeper Understand the technical background of piezoelectric ceramic applications, and ensure high reliability through appropriate design and operation.
Even if the structure of the piezoelectric system has proven to be reliable, any seemingly minor changes need to be re-evaluated. In some practical applications, the reliability of piezoelectric ceramics is often discussed under the following two extreme conditions.
Every link in the operation process must be strictly controlled, through actual testing and evaluation procedures, to avoid overloading, unreasonable mechanical structure, mechanical compensation and correction of inappropriate driving conditions, so as to achieve high reliability.
Piezoelectric ceramics can output performance based on limited parameters in a short time, but we would not recommend this method. When long-term reliability, long-term work and high duty cycles are necessary conditions, the successful short-term test of a piezoelectric system does not mean that it is equally safe and reliable for long-term use. Incorrect operation will not immediately damage the piezoelectric ceramics, but will reduce long-term reliability and fail to achieve the expected working cycle.
The reliability of piezoelectric ceramics is affected by the mechanical structure of the load, drive control, and operating environment and other conditions; in most applications, due to cost reasons, users often want to use piezoelectric ceramics as small as possible. Electroceramic components have become the weakest link in many mechanical design structures. In addition, piezoelectric ceramics are a relatively complex material and very sensitive. Improper handling can easily cause damage.
Application
1. ultrasonic cleaning trasnducer
2. ultrasonic welding tansducer
3. ultrasonic beauty transducer
4. ultrasonic underwater transducer
5. ultrasonic immersible transucer
6. ultrasonic screening transducer
7. ultrasonic cutting transducer
8. ultrasonic atomization transducer
9. ultrasonic emulsifier
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The piezoelectric ceramics are sensitive to external forces so that they can even sense the air disturbance caused by flying insects'flapping wings more than a dozen meters away and convert extremely weak mechanical vibrations into electrical signals. This characteristic of piezoelectric ceramics can be used in sonar system, weather detection, telemetry environmental protection, household appliances and so on.
Piezo Ceramic For Tooth-Cleaning
| Specification | Dimension (mm) |
Radial Frequency (fs) |
Capacitance (pF) |
Electromechanical coupling coefficient (Kr) |
Piezoelectric voltage coefficient ( d33) |
Dielectric dissipation factor (tanδ) |
| OKS-JYJP-1052 | Φ10×Φ5×2 | 145KHz±5% | 330 ±12.5% | 0.54 | 260 | ≤0.6 |
| OKS-JYJP-1051 | Φ10×Φ5×2 | 150KHz±5% | 310±12.5% | 0.31 | 200 | ≤0.3 |
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| Specification | Dimension (mm) |
Radial frequency (KHz) |
Capacitance (±12.5%)pF |
Dielectric dissipation factor tanδ(%) |
Impedance (Ω) |
Kr | Mechanical quality factor (Qm) |
| OKS-QXJP3030 | Φ30×3.0 | 66.7 | 2730 | ≤0.3 | ≤15 | ≥0.55 | 500 |
| OKS-QXJP3530 | Φ35×3.0 | 63.0 | 3100 | ≤0.3 | ≤15 | ≥0.55 | 500 |
| OKS-QXJP3865 | Φ38×6.5 | 59.9 | 1580 | ≤0.3 | ≤15 | ≥0.55 | 500 |
| OKS-QXJP4530 | Φ45×3.0 | 50.0 | 5100 | ≤0.3 | ≤15 | ≥0.55 | 500 |
| OKS-QXJP4535 | Φ45×3.5 | 50.0 | 4700 | ≤0.3 | ≤15 | ≥0.55 | 500 |
| OKS-QXJP5030 | Φ50×3.0 | 46.0 | 5800 | ≤0.3 | ≤15 | ≥0.55 | 500 |
| OKS-QXJP5035 | Φ50×3.5 | 46.0 | 6300 | ≤0.3 | ≤15 | ≥0.55 | 500 |
| OKS-QXJP5050 | Φ50×5.0 | 46.0 | 4150 | ≤0.3 | ≤15 | ≥0.55 | 500 |
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| Specification | Dimension (mm) |
Radial frequency (KHz) |
Capacitance (pf) |
Dielectric dissipation factor tanδ(%) |
Electromechanical coupling coefficient (Kr) |
Impedance Zr(Ω) |
Thickness frequency (KHz)) |
Mechanical quality factor (Qm) |
| OKS-YHJP-25103 | Φ25×Φ10×3 | 66.4 | 1240±12.5% | ≤0.3 | ≥0.46 | ≤15 | 683±5% | 800 |
| OKS-YHJP-225104 | Φ25×Φ10×4 | 66.4 | 930±12.5% | ≤0.3 | ≥0.46 | ≤15 | 512±5% | 800 |
| OKS-YHJP-35155 | Φ35×Φ15×5 | 45.6 | 1550±12.5% | ≤0.3 | ≥0.46 | ≤15 | 512±5% | 800 |
| OKS-YHJP-381364 | Φ38×Φ13×6.4 | 45.3 | 2300±12.5% | ≤0.3 | ≥0.46 | ≤15 | 512±5% | 800 |
| OKS-YHJP-38155 | Φ38×Φ15×5 | 43.2 | 2200±12.5% | ≤0.3 | ≥0.46 | ≤15 | 512±5% | 800 |
| OKS-YHJP-40155 | Φ40×Φ12×5 | 45.9 | 2070±12.5% | ≤0.3 | ≥0.46 | ≤15 | 410±5% | 800 |
| OKS-YHJP-40155 | Φ40×Φ15×5 | 42.2 | 1960±12.5% | ≤0.3 | ≥0.46 | ≤15 | 323±5% | 500 |
| OKS-YHJP-40176 | Φ40×Φ17×6 | 40.5 | 1555±12.5% | ≤0.3 | ≥0.46 | ≤15 | 341±5% | 800 |
| OKS-YHJP-40205 | Φ40×Φ20×5 | 37.9 | 1700±12.5% | ≤0.3 | ≥0.47 | ≤15 | 410±5% | 800 |
| OKS-YHJP-45155 | Φ45×Φ15×5 | 35.2 | 2200±12.5% | ≤0.3 | ≥0.47 | ≤15 | 385±5% | 600 |
| OKS-YHJP-50205 | Φ50×Φ20×5 | 33.2 | 2490±12.5% | ≤0.3 | ≥0.46 | ≤15 | 341±5% | 500 |
| OKS-YHJP-50206 | Φ50×Φ20×6 | 33.2 | 2490±12.5% | ≤0.3 | ≥0.46 | ≤15 | 341±5% | 500 |
| OKS-YHJP-502065 | Φ50×Φ20×6.5 | 33.2 | 2490±12.5% | ≤0.3 | ≥0.46 | ≤15 | 341±5% | 500 |
| OKS-YHJP-50175 | Φ50×Φ17×5 | 34.3 | 2430±12.5% | ≤0.3 | ≥0.46 | ≤15 | 315±5% | 800 |
| OKS-YHJP-50176 | Φ50×Φ17×6 | 34.3 | 2430±12.5% | ≤0.3 | ≥0.46 | ≤15 | 315±5% | 800 |
| OKS-YHJP-501765 | Φ50×Φ17×6.5 | 34.8 | 2430±12.5% | ≤0.3 | ≥0.46 | ≤15 | 315±5% | 800 |
| OKS-YHJP-50236 | Φ50×Φ23×6 | 31.2 | 2340±12.5% | ≤0.3 | ≥0.47 | ≤15 | 341±5% | 800 |
| OKS-YHJP-50276 | Φ50×Φ27×6 | 29.3 | 2100±12.5% | ≤0.3 | ≥0.47 | ≤15 | 341±5% | 800 |
| OKS-YHJP-603010 | Φ60×Φ30×10 | 25.3 | 1922±12.5% | ≤0.3 | ≥0.47 | ≤15 | 341±5% | 800 |
50X20X6MM PZT8 piezoelectric ceramic materials
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