What Is The Principle Of Ultrasonic Disperser

What is the principle of ultrasonic disperser

The ultrasonic disperser is a method for dispersing the particle suspension to be treated directly in the ultrasonic field and "irradiating" it with high-power ultrasonic waves.

Ultrasonic Dispersometer Principle

▲ First of all, the propagation of ultrasonic waves needs a medium as a carrier.

▲ The propagation of ultrasonic waves in the medium has an alternating cycle of positive and negative pressure. The medium is squeezed and pulled under the positive and negative pressure of the colloid.

▲ When the ultrasonic wave acts on the medium liquid, the distance between the molecules of the medium in the negative pressure zone will exceed the critical molecular distance that the liquid medium remains unchanged, the liquid medium will break, forming microbubbles, and the microbubbles will grow into cavitation bubble.

▲ Bubbles can be re-dissolved in the gas, they can also float up and disappear, or they can collapse from the resonance phase of the ultrasonic field.

▲ This phenomenon of cavitation bubbles generated, collapsed or disappeared in the liquid medium.

▲ The cavitation effect will generate local high temperature and high pressure, and generate huge impact force and microjet. Under the action of the nano powder, the surface energy will be weakened, so as to achieve the dispersion effect on the nano powder.

Comparison of ultrasonic disperser with conventional mechanical ultrasonic disperser:

▼ Mechanical dispersion method can be divided into:

 Grinding, ordinary ball milling, vibration ball milling, colloid milling, air milling, mechanical dispersion, etc.

The mechanical dispersion method has many steps, requires a lot of equipment, and is complicated, while ultrasonic dispersion requires only one power source and one vibrating rod.