The early application of ultrasonic disperser should be to smash the cell wall with ultrasound to release its contents. Low intensity ultrasound can promote the biochemical reaction process. For example, irradiating the liquid nutrient base with ultrasound can increase the growth speed of algae cells, thereby increasing the amount of protein produced by these cells by 3 times.

The ultrasonic nano scale agitator is composed of three parts: ultrasonic vibration part, ultrasonic driving power supply and reaction kettle. The ultrasonic vibration component mainly includes an ultrasonic transducer, an ultrasonic horn and a tool head (transmitting head), which is used to generate ultrasonic vibration and transmit the vibration energy into the liquid. The transducer converts the input electrical energy into mechanical energy.

Its manifestation is that the ultrasonic transducer moves back and forth in the longitudinal direction, and the amplitude is generally several microns. Such amplitude power density is insufficient and cannot be directly used. The horn amplifies the amplitude according to the design requirements, isolates the reaction solution and the transducer, and also plays the role of fixing the whole ultrasonic vibration system. The tool head is connected with the horn. The horn transmits the ultrasonic energy and vibration to the tool head, and then the tool head emits the ultrasonic energy into the chemical reaction liquid.

Alumina is more and more widely used in modern industry. Coating is a common application, but the size of particles restricts the quality of products. Refining by grinding machine alone can not meet the needs of enterprises. Ultrasonic dispersion can make alumina particles reach about 1200 mesh.

, ultrasonic refers to the frequency of 2 × 104 hz-107 Hz sound wave, which exceeds the range of human ear listening frequency. When ultrasonic wave propagates in liquid medium, it produces a series of effects such as mechanics, heat, optics, electricity and chemistry through mechanical action, cavitation and thermal action.

It is found that ultrasonic radiation can increase melt fluidity, reduce extrusion pressure, increase extrusion yield and improve product performance.