JIANGSU JIUJIUJIAYI ULTRASONIC TECHNOLOGY CO.,LTD

When the ultrasonic wave propagation in a medium, due to the ultrasonic wave interaction with the media, the media have the physical or chemical change, resulting in a series of mechanical, thermal, electromagnetic and chemical effects of ultrasound, including the following four kinds of effects:
(1) mechanical effect: ultrasonic mechanical action may contribute to a liquid emulsion and the liquid and solid dispersion of gel. When ultrasonic standing wave formed in the fluid medium of particles suspended in a fluid due to the effect of mechanical force and condensed in nodal, was formed in the space to pile up. Ultrasonic wave propagation in piezoelectric materials and magnetostrictive materials, due to the mechanical action of ultrasonic wave caused by the induced polarization and electric induced magnetization (i.e., the dielectric physics said magnetostriction).
(2) the cavitation effect: when ultrasonic wave ACTS on liquid, can produce a large number of small bubbles. One reason is that the liquid inside appear local tensile stress to form a negative pressure, the pressure reduction which soluble in liquid, gas supersaturation and escape from the liquid into small bubbles. Another reason is that strong tensile stress in the liquid "split" into a hollow, referred to as cavitation. Empty for liquid vapor or soluble in another kind of gas, and perhaps even a vacuum. Because of small bubbles formed by the cavitation will vary with the vibration of the surrounding medium constant motion, grew up, or suddenly burst. Burst into fluid surrounding the bubbles and produce high temperature and high pressure, producing a shock wave. And cavitation accompanied by internal friction can form the charge, and produce glow discharge within the bubbles. In a liquid ultrasonic processing technology are related to the cavitation.
(3) heat effect: due to the high ultrasonic frequency, energy, and vibrate when absorbed by the medium or friction can produce significant thermal effect.
(4) chemical effect: the effect of ultrasound can make or speed up certain chemical reactions happen. For example, the pure distilled water after ultrasonic treatment to produce hydrogen peroxide; Water is dissolved nitrogen after ultrasonic treatment produce nitrite; Dye aqueous solution after ultrasonic treatment can change color or fade. The occurrence of these phenomena with cavitation accompanied. Ultrasound can also accelerate the hydrolysis of many chemical substances, decomposition and polymerization process. Ultrasonic light chemical and electrochemical process has obvious influence. Various amino acids and other organic material solution after ultrasonic treatment, the characteristic absorption spectrum with disappear and general absorption of homogeneously, this shows that the cavitation effect makes the molecular structure has changed.