超声空化效应对溶液电导率的影响

大功率超声作用于溶液时会产生空化效应,并影响溶液的物理化学性质,如电导率、液体粘度及液体表面张力等。文章对不同功率的超声作用于弱电解质溶液时其电导率的变化进行了实验研究,发现溶液电导率与超声波强度有关。当强度增大到有空化产生时,电导率开始减小;继续增大强度,溶液电导率减小到一定程度后有小幅回升现象出现。且液体内空化效应的出现将导致液体的电导率减小,空化达到一定强度时,空化效应引起的局部瞬态高温高压、冲击波和微射流导致的新导电粒子,会使电导率小幅回升。

Impact of ultrasonic cavitation upon electrical conductivity of solution

Cavitation is produced when high-power ultrasound acts on a solution,affecting the physical and chemical characteristics of the solution such as electrical conductivity,viscidity,surface tension,etc.Electrical conductivity is studied under different ultrasonic energy acting on different solutions.It has been found that cavitation diminishes conductivity of the solution.When the ultrasonic intensity becomes higher,instantaneous local high temperature and high press,shock waves and tiny jet streams occur.Furthermore,new electricity-carrying particles are gener-ated,and conductivity will rise slightly.