Overview
EN ISO 17947:2023 (adoption of ISO 17947:2014) defines standardized methods for chemical analysis of fine silicon nitride powders used as raw materials for fine ceramics (advanced/technical ceramics). The document covers sample preparation (sampling, drying, weighing), analytical procedures and reporting rules for determining total silicon, total nitrogen, aluminium, iron, calcium, oxygen, carbon, fluorine and chlorine in silicon nitride powders. The standard was adopted by CEN/TC 184 and is applicable across national bodies of CEN members.
Key topics and technical requirements
- Analytes and sample preparation
- Specifies analytes to be measured and general sample handling: sampling, drying and weighing procedures to ensure representative results.
- Analytical techniques documented
- ICP-OES and fusion–dehydration/insolubilization separation–gravimetry for total silicon.
- XRF fused cast-bead method for silicon (fused-bead XRF).
- Nitrogen determination via several routes: acid pressure decomposition–distillation–acidimetric titration; inert gas fusion–thermal conductivity; and fusion–ammonia separation–titration.
- Aluminium, iron, calcium: wet-chemical decomposition, calibration and quantitation procedures.
- Oxygen: dedicated method and calibration approach for oxygen determination.
- Carbon: multiple combustion-based techniques (RF furnace with IR absorption, resistance furnace with coulometry, gravimetry or conductometry).
- Fluorine and chlorine: extraction/separation chemistry, calibration and calculation methods.
- Quality control and reporting
- Blank tests, calibration curves, calculation formulas, number of analyses, evaluation and expression of analytical values.
- Informative annexes include commercial certified reference materials and round-robin results for method validation.
- Traceability and conformity
- Procedures intended to provide reproducible, comparable chemical data for quality control and specification compliance.
Applications and users
- Ceramic manufacturers producing silicon nitride components (bearings, engine parts, wear-resistant components) use the standard for incoming raw-material quality control.
- Analytical laboratories and QA/QC teams use the described methods (ICP-OES, XRF, inert gas fusion, combustion analyses) to produce validated compositional data.
- Materials scientists and R&D groups rely on standardized chemical analyses to correlate powder chemistry with sintering behavior and final ceramic properties.
- Suppliers and procurement use the standard to define material specifications and acceptance criteria.
- Regulatory and certification bodies benefit from harmonized methods for cross-lab comparability.
Related standards and references
- EN ISO 17947:2023 is the CEN adoption of ISO 17947:2014; it was prepared by ISO/TC 206 and adopted by CEN/TC 184.
- The standard references typical instrumental techniques (ICP-OES, XRF, inert gas fusion, combustion analysis) that are also covered in other ISO and national test-method standards for elemental analysis.
Keywords: EN ISO 17947:2023, silicon nitride powders, chemical analysis, fine ceramics, ICP-OES, XRF, inert gas fusion, combustion analysis, nitrogen determination, oxygen carbon fluorine chlorine analysis.