BS ISO 20998-3:2017给出了用于测定 分散在高浓度液体中的一种或多种物质相的粒度分布，其中 超声衰减谱不是颗粒体积分数的线性函数。在这个政权中， 粒子间的相互作用不容忽视。本文件适用于胶体、分散体、泥浆和乳液。典型的颗粒大小 对于这种分析，其范围为10 nm至3 mm，但也发现了超出该范围的颗粒 成功测量。可以测量分散相的浓度 从体积的约5%到体积的50%以上，这取决于 连续相和分散相、粒度和频率范围[9][10]。这些超声波 方法可用于监测粒度分布的动态变化，包括团聚或 絮凝作用。交叉引用:ISO 20998-2:2013 ED1ISO 14488:2007 Ed 1ISO 20998-1:2006 Ed 1 ISO Guide 35:2006购买本文件时可获得的所有现行修订均包含在购买本文件中。

BS 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.This document 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.Cross References:ISO 20998-2:2013 ED1ISO 14488:2007 Ed 1ISO 20998-1:2006 Ed 1 ISO Guide 35:2006All current amendments available at time of purchase are included with the purchase of this document.