You would like to perform a granulometric analysis according to ISO 24235
The particle size distribution of a material directly influences its physical properties and process behavior: homogeneity of a mixture, chemical reactivity, powder flow, and the quality of a finished product.
Poor control of particle size distribution can lead to performance variations or manufacturing defects: particle segregation, compaction problems, suspension instability, or product non-conformity.
At the Filab laboratory, we perform granulometric analysis according to ISO 24235 to determine the size and distribution of particles in your materials and provide you with reliable and actionable results for quality control, R&D, or process optimization.
Granulometric analysis according to ISO 24235
Granulometry distribution refers to the measurement of particle size and its distribution within a material. This property is essential for characterizing powders, suspensions, or granular materials used in many industrial processes.
ISO 24235 defines a methodological framework for characterizing granulometric distribution to ensure:
- reproducibility of measurements
- comparability of results between laboratories
- reliability of analytical data
This information is essential for understanding the functional properties of materials and ensuring the safety of industrial processes.
Our technical resources for particle size analysis according to ISO 24235
Laser diffraction/ laser ganulometry
Laser diffraction granulometry analysis, or laser granulometry, is one of the most commonly used techniques for measuring the particle size distribution of particles.
It allows, in particular, the determination of:
- the average particle size
- the complete particle size distribution
- the characteristic diameters (D10, D50, D90)
This technique is suitable for a wide range of materials, whether dry or in suspension.
The Filab laboratory assists you with particle size analysis according to ISO 24235
Key indicators provided during a particle size analysis according to ISO 24235
FILAB uses state-of-the-art laser particle size analyzers to characterize your powders with extreme precision.
Key indicators provided:
- D10, D50 (median), D90: distribution thresholds indicating the volume percentage of particles below a given size.
- Cumulative and differential distribution curves: comprehensive visualization of the particle population.
- Calculated specific surface area: estimation of powder reactivity.
- Polydispersibility analysis: detection of the presence of agglomerates or fines.
Types of products concerned by ISO 24235 analysis
Silicon nitride (Si3N4)
Carbides and Borons
Aluminas and Zircons
Why measure particle size according to ISO 24235?
In the manufacture of high-performance ceramics, particle size directly influences every stage of your production:
Optimizing filling: controlled particle size distribution allows for better raw density (compaction).
Final properties: the toughness, hardness and surface finish of the final ceramic depend on the fineness of the initial powder.
Sintering kinetics: finer particles react faster, influencing temperature and cooking time.
Suspension stability: essential for slip casting processes.
In what context should a granulometric analysis be carried out according to ISO 24235?
Thanks to its expertise in materials characterization, the Filab laboratory supports manufacturers in measuring and interpreting particle size data.
Analyses can be performed in various contexts:
- Quality control of raw materials or finished products
- Material failure investigation
- Industrial process optimization
- R&D studies and development of new materials
The results provided allow for an understanding of particle behavior and the adaptation of industrial processes accordingly.
Our granulometric analysis services
Our FAQ
Particle size analysis refers to the measurement of particle size and their distribution within a material. It allows for the characterization of powders, suspensions, or granular materials.
Granulometry influences many properties:
- chemical reactivity
- powder flow
- specific surface area
- homogeneity of mixtures
- mechanical or functional performance
Sieving is limited to coarse particles. For silicon nitride, the grains are often less than 1 micrometer (µm). Laser diffraction is the only industrial method capable of accurately measuring particles ranging from nanometers to millimeters in size within minutes, providing a complete picture of the powder's "fineness."
These are statistical indicators of volumetric distribution:
- D50 (Median): 50% of the powder volume consists of particles smaller than this value. This is the primary indicator of fineness.
- D10: 10% of the powder is finer than this value (indicates the presence of "fines").
- D90: 90% of the powder is finer than this value (indicates the presence of coarse grains or agglomerates).
Yes. Laser diffraction assumes that the particles are spherical. Since silicon nitride grains can be elongated (acicular), the result is expressed as "equivalent diameter." For a true morphological analysis (shape, appearance), we recommend combining laser diffraction particle size analysis with Scanning Electron Microscopy (SEM).
A powder that doesn't meet specifications (too many large or too many fine particles) won't compact properly during pressing. This creates micro-cracks or residual porosity after sintering. By testing each batch according to ISO 24235, you can validate the conformity of your raw material before incurring firing and processing costs.
Turnaround times vary depending on the nature of the analysis and the complexity of the expert assessment project.
However, FILAB is committed to providing fast turnaround times tailored to your industrial constraints and urgent needs.
To obtain a quote, you can contact our team via our contact form, by phone, or by email.
Simply tell us your requirements (type of material, desired analysis, applicable standards, urgency, quantity of samples, etc.). We will then send you a personalized technical and pricing proposal within 24-48 hours.
