标准摘要
[中文适用范围]： 本文件给出了超声波衰减光谱方法的指南，用于确定以高浓度分散在液体中的一种或多种材料相的尺寸分布，其中超声波衰减光谱不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不可忽略。 本文件适用于胶体、分散体、浆料和乳液。 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。 测量的分散相浓度范围为约 5% 体积至超过 50% 体积，具体取决于连续相和分散相之间的密度对比、颗粒尺寸和频率范围[9] [10 ]。 这些超声波方法可用于监测尺寸分布的动态变化，包括附聚或絮凝。 [外文原描述]： ISO 20998-3:2017 gives guidelines for ultrasonic attenuation spectroscopy methods for determining the size distributions of one or more material phases dispersed in a liquid at high concentrations, where the ultrasonic attenuation spectrum is not a linear function of the particle volume fraction. In this regime, particle-particle interactions are not negligible. ISO 20998-3:2017 is applicable to colloids, dispersions, slurries, and emulsions. The typical particle size for such analysis ranges from 10 nm to 3 mm, although particles outside this range have also been successfully measured. Measurements can be made for concentrations of the dispersed phase ranging from about 5 % by volume to over 50 % by volume, depending on the density contrast between the continuous and the dispersed phases, the particle size, and the frequency range [ 9 ] [ 10 ] . These ultrasonic methods can be used to monitor dynamic changes in the size distribution, including agglomeration or flocculation.
英文名称Measurement and characterization of particles by acoustic methods — Part 3: Guidelines for non-linear theory