68KHz 30W PZT4 High Frequency Low Power Ultrasonic Vibration Transducer 

The mechanism of ultrasonic cleaning is to make use of the physical effects such as cavitation, radiation pressure and sound flow in the cleaning liquid. It can exfoliate the machinery produced by the dirt on the cleaning parts, and can also promote the chemical reaction between the cleaning liquid and the dirt, so as to achieve the purpose of cleaning the object. The frequency of the ultrasonic cleaning machine can be selected by 10~500 kHz according to the size and purpose of the cleaning material, generally more than 20~50 kHz. With the increase of the frequency of ultrasonic transducer, Langerhans oscillator, longitudinal oscillator and thickness oscillator can be used. In the miniaturization aspect, radial vibration and flexural vibration are also adopted. Ultrasonic cleaning has become more and more widely used in various industries, agriculture, household equipment, electronics, automobile, rubber, printing, aircraft, food, hospital and medical research.

The transducer uses different piezoelectric materials to explain that:
The black chip is P4 series, which is a medium power emitting material with dual transmitting and receiving characteristics.
With low dielectric loss and high mechanical quality factor, it is mainly used in ultrasonic cleaning, ultrasonic atomization and so on.
The Yellow chip is P8 series, which is a high-power emission material with high mechanical quality factor.
Good stability, very low dielectric loss, especially suitable for making high-power ultrasonic transducers. Widely used in
Ultrasonic welding, ultrasonic emulsification, ultrasonic polishing, ultrasonic cleaning and so on.

The frequency of the transducer is inversely proportional to the wavelength, and the size of the wavelength is related to the diameter of the cavities (strictly speaking, it is caused by low frequency and longer nucleation time), and the diameter of the cavities is related to its explosion pressure. Generally, the higher the frequency, the smaller the wavelength, the smaller the diameter of the cavities, and the lower the explosion pressure, but the higher the density of the cavities and the better the permeability.
Based on the above principles:
Low frequency (17 ~ 23KHz): When the dirt to be cleaned is heavy or difficult to clean, and the impact of the explosion on the surface of the cleaned material is not great, a low frequency transducer should be selected. Commonly used industries are: magnetic industry, auto maintenance industry, textile industry, etc. Note that this series is relatively noisy, so it is best to do sound insulation treatment.
 Intermediate frequency (25 ~ 28KHz): If the dirt to be cleaned is slightly heavy or difficult to clean, and the impact of the explosion on the surface of the cleaned material is not great, you should choose an intermediate frequency transducer. This series of industries is the most widely used. The common ones are: machining industry, electroplating industry, catering industry, etc.
Medium and high frequency (33 ~ 60KHz): If the dirt to be cleaned is light, easy to clean, or if there is a requirement for the impact of the explosion on the surface of the cleaned object, a medium to high frequency transducer should be selected. Commonly used industries are: precision parts, glass glasses, electronic components, circuit boards, etc .;
High frequency (68-200KHz): The dirt to be cleaned is very light and easy to clean. When it is required to prevent any damage to the surface of the cleaned object from the impact of explosion, a high frequency series transducer should be selected. Commonly used industries are: semiconductors, special high-precision parts, etc.

Main Features:

• High Q value.
• Large amplitude.
• High conversion frequency, low heat.
• Output is stable.
• Strict quality control.

1.High efficiency : high quality mechine, high electro-acoustic conversion efficiency at the resonant frequencies.
2.Large amplitude : computer optimized structure, high vibration ratio , large amplitude front cover.
3.High power: In the influence of pre-stressed screw, piezoelectric ceramic energy can achieve to the most.
4.Heat-resistance: small resonant impedance, wide temperature range.

68KHz 30W PZT4 High Frequency Low Power Ultrasonic Vibration Transducer