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Innovation application: Laser Diffraction Analysis to Determine Particle Size Distribution

Title Laser Diffraction Analysis to Determine Particle Size Distribution
Abstract

Laser diffraction analysis is used to determine particle size distributions. We offer to perform measurements for various materials (powders, suspensions, colloids, soils, and other natural materials); the size of the measured particles may be from 10 nm up to 500 µm. Measurements are performed in water.

Keywords particles, particle size, particle size distribution, laser diffraction analysis, granulometry, powders, suspensions, soil, powder characterization
Authors Zilgma Irbe
Jānis Ločs
Department (14400) Vispārīgās ķīmijas tehnoloģijas institūts
Statistical Classification of Economic Activities, NACE 2 Scientific research and development
Other professional, scientific and technical activities
Description of the technology

Laser diffraction analysis is performed using Analysette 22 NanoTech (Fritsch) device. To determine particle size distribution a small amount of particles are suspended in approximately 700 mL of water. If suspension contains agglomerates, they will be measured alongside primary particles; for this reason a sample preparation (dispersion) technique suited for the particular sample material. Particle size distribution is calculated by volume. For example, 5 % of the volume is taken by particles with diameter 25-27 µm. Size range for the measurements is from 10 nm up to 500 µm. Results are available as graphs or tables.

Applications It is possible to use laser diffraction analysis in many industries that use powder technologies (manufacture of building materials, ceramic materials, sorbents, pigments, cosmetics, also some aspects of pharmaceutical industry). Laser particle analysis can also be used to characterize soils, sand, silt and clay, and other natural materials.
Advantages

Laser diffraction analysis is faster than alternative methods that are based on sedimentation; duration of one measurement is 5-10 min. If laser diffraction analysis is compared to image analysis, the sample analysed by laser diffraction has much larger number of particles. It is also possible to determine particle size distribution for samples that include both large and very small particles. 

Technology Readiness Level Actual system proven in operational environment
Partnership offer • Service contracts to determine particle size distribution using laser diffraction analysis.
ID 97
Contact information email: santa.puskarjova@rtu.lv and ilmars.viksne@rtu.lv; phone number: +371 29373757 un +371 29187403