The probe ultrasonic processor is composed of ultrasonic generator, piezoelectric transducer, amplitude converter and probe. The generator generates high-frequency electrical signals ranging from 20 kilohertz to several megahertz, and the piezoelectric transducer converts the electrical signals into mechanical vibrations based on the piezoelectric effect. The horn amplifies and transmits the vibration to the probe, and after the probe touches the sample, the ultrasonic wave causes a cavitation effect in the sample medium. Under the alternating cycles of negative pressure and positive pressure, bubbles form and collapse, resulting in shock wave, microjet and high temperature and high pressure environment, which can disperse, emulsify or break the sample.
In the preparation of nanomaterials, the nano-scale dispersion of large-particle materials is realized with the help of ultrasonic cavitation, and the size and morphology of materials are accurately controlled, such as the preparation of graphene by stripping graphite sheets. When the composite material is prepared, the strengthening phase is evenly dispersed in the matrix material to improve the material performance, like the uniform dispersion of ceramic particles in the metal matrix composite material to enhance the strength and wear resistance.
In the emulsification of food, the oil and water are promoted to form a stable emulsion to improve the texture and taste of food, such as improving product stability and shelf life in dairy processing. In food preservation, destroy microbial cell wall, prolong the shelf life of food.
High processing efficiency, ultrasonic cavitation can efficiently process samples in a short time, shorten the experiment and production cycle. The operation is flexible, and the ultrasonic power, frequency and processing time can be adjusted according to different needs.
Looking forward to the future, with the continuous progress of science and technology, the probe ultrasonic processor will develop in the direction of intelligence, multi-function and green environmental protection. Through the introduction of an intelligent control system, the equipment can automatically optimize ultrasonic parameters according to the nature and processing requirements of the sample to achieve accurate processing.
