用声学方法测量和表征粒子.第2部分:线性理论

[中文适用范围]： 本文件规定了超声波衰减光谱方法的要求，用于确定稀浓度液体中分散的颗粒相的尺寸分布，其中超声波衰减光谱是颗粒体积分数的线性函数。 在这种情况下，粒子与粒子之间的相互作用可以忽略不计。 胶体、稀释分散体和乳液均在本文件的范围内。 此类分析的典型颗粒尺寸范围为 10 nm 至 3 mm，但也已成功测量了超出此范围的颗粒。 对于悬浮液中的固体颗粒，尺寸测量的浓度范围通常为 0.1 %（体积）到 5 %（体积），具体取决于固相和液相之间的密度对比、颗粒尺寸和频率范围。 9]，[10]。 对于乳液，可以在更高的浓度下进行测量。 这些超声波方法可用于监测尺寸分布的动态变化。 [外文原描述]： This document specifies requirements for ultrasonic attenuation spectroscopy methods for determining the size distributions of a particulate phase dispersed in a liquid at dilute concentrations, where the ultrasonic attenuation spectrum is a linear function of the particle volume fraction. In this regime particle-particle interactions are negligible. Colloids, dilute dispersions, and emulsions are within the scope of this document. The typical particle size for such analysis ranges from 10 nm to 3 mm, although particles outside this range have also been successfully measured. For solid particles in suspension, size measurements can be made at concentrations typically ranging from 0,1 % by volume up to 5 % by volume, depending on the density contrast between the solid and liquid phases, the particle size, and the frequency range [ 9 ],[ 10 ] . For emulsions, measurements can be made at much higher concentrations. These ultrasonic methods can be used to monitor dynamic changes in the size distribution.