Material characterization
Particle size & grain size
The most well-known techniques for the determination of particle size, grain size or particle size are sieve analysis and laser diffraction (wet and dry measurements).
For the determination of nanoparticles at extremely high resolution, a disk centrifuge (also known as accelerated sedimentation) is used. The size of particles in samples with high concentration up to 40% is determined by electro-acoustic attenuation techniques. Optical techniques such as dynamic image analysis are used for particle size measurement in laboratory or production environments, or as an automated alternative to sieve analysis.
Laser diffraction
Fritsch ANALYSETTE 22 NeXT Micro
- Laser diffraction analyser for the determination of particle size distribution of suspensions, emulsions and powders
- Measuring range 500 nm – 1500 μm
- Short measuring times, high measuring accuracy, consistent reproducibility
- Robust with few moving parts, easy operation, quick cleaning
Fritsch ANALYSETTE 22 NeXT Nano
- Laser diffraction analyser for the determination of particle size distribution of suspensions, emulsions and powders
- Measuring range 10 nm – 3800 μm
- Short measuring times, high measuring accuracy, consistent reproducibility
- Robust with few moving parts, easy operation, quick cleaning
Fritsch ANALYSETTE 28 ImageSizer
- Dry measurement of powders and bulk solids – measuring range 20 μm – 20 mm
- Wet measurement of powders, suspensions & emulsions – measuring range 5 µm – 3 mm
- High-performance camera with telecentric lenses
- State-of-the-art evaluation with the ImageSizing-Software ISS
Sieve analysis
Fritsch ANALYSETTE A3
- Robust and user-friendly laboratory sieve
- Can be used with a sieve tower of 10 standard sieves of 200 mm diameter and 50 mm high
- For wet or dry sieve analysis from 20 µm to 63 mm
- Models “Partan” and “Pro” with manual and automatic amplitude control
Fritsch ANALYSETTE 18
- Robust heavy-duty sieve for samples up to 15 kg
- Wet and dry sieving from 20 µm to 125 mm with sieves up to 450 mm diameter
- 3-dimensional sieving with automatic amplitude control
Disk centrifugation
CPS disk centrifuge
- High-resolution particle size analysis in the range of 5 nm to 30 µm with 2 to 10 times better resolution than other techniques
- “absolute” measurement method, based on accelerated sedimentation, with separation of polydisperse samples with peaks less than 2% apart
- Rapid measurements (10-15 min) in aqueous or organic environment
Electroacoustic analysis
Colloidal Dynamics Acoustosizer
- Robust met method for determination of particle size (0.01 µm to 50 µm), zeta potential, pH, conductivity and temperature in concentrated samples from 1% to 40%
- Applicable for measurement of aqueous or organic samples in reactors or by-pass in production
- Can be equipped with titrator unit for determining the influence of acids, bases or other reagents on particle size or zeta potential
Electron microscopy
Thermo Phenom desktop SEM
- De Thermo Phenom desktop SEM is equipped with unique “Particle Metric” software for determination of size, shape and number distributions of particles
- Measuring range from 100 nm to 100 µm
- Calculates all shape and size parameters up to 1000 particles per minute comes with the “Nebula particle dispenser” for homogeneous and representative sample preparation on the SEM sample holder