NBN ISO 20998-3:2020

Measurement and characterization of particles by acoustic methods — Part 3: Guidelines for non-linear theory (ISO 20998-3:2017)

ACTIVE

About this standard

Languages
English
Type
NBN
Standards committee
NBN/I02404
Status
ACTIVE
Publication date
29 July 2020
ICS Code
19.120 (Particle size analysis. Sieving)
Withdrawn Date

About this training

Summary

This document 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.