【摘要】 提出一种基于两个频率下超声衰减系数测量,并结合ECAH超声衰减模型得到悬浊液中颗粒平均粒径的方法。并通过对亚微米范围的钛白粉悬浊液在1和2MHz频率下进行测量。测量结果与消光法测量进行对比,表明该方法应用到颗粒粒度大小测量是切实可行的。更多还原

【Abstract】 It presents a particle sizing method based on the principle of ultrasonic attenuation （UA） with two frequencies. As a theoretical basis, the ECAH ultrasonic model is employed to predict the attenuation. And experiments of aqueous TiO₂ suspensions are carried out to measure the particle mean size, in which ultrasonic signal has been generated and received by transducers with fixed frequencies 1 and 2MHz. The ultrasonic measurement results are compared with light extinction method measurement, which shows this method has a good foreground for particle sizing.更多还原