Atomfair High-Purity Silicon Nitride (Si3N4) Ceramic Powder for Bearing Materials, Alpha Phase ≥93%, D50 <0.9 μm, 3N (99.9% purity)
Product Description
Atomfair High-Purity Silicon Nitride (Si3N4) Ceramic Powder for Bearing Materials is supplied as white powder with Alpha phase ≥93% and the stated particle-size specification. It is intended for silicon nitride ceramic bearing and rolling-element materials research. 3N (99.9% purity) grade.
Technical Specifications |
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Customization & Ordering
Custom specifications, quantities, and packaging may be available upon request. Minimum order quantities, pricing, and lead times will be confirmed during technical review and quotation.
Key Features and Advantages
- Alpha-phase silicon nitride grade with a defined phase proportion.
- D50 particle size below 0.9 μm for ceramic rolling-element material processing.
- Controlled Fe, Al, Ca, free silicon, carbon, and oxygen specifications.
APPLICATION SCOPE: silicon nitride ceramic bearing and rolling-element materials research.
DOCUMENTATION: COA and SDS can be provided upon request for batch-specific confirmation.
TAILORED SOLUTIONS FOR RESEARCH
Contact our engineering team for technical support or official institutional quotations.
The powder must be stored in a dry, sealed container to prevent moisture absorption and oxidation. Avoid exposure to airborne contaminants that could alter particle size distribution or phase purity.
- Moisture Sensitivity: Store in a low-humidity environment to prevent agglomeration and degradation of the alpha phase.
- Contamination Control: Handle in a clean environment to avoid introducing iron, aluminum, or calcium impurities that exceed the specified limits.
This procedure outlines safe handling and preparation of the powder for ceramic bearing material research. Follow these steps to maintain phase purity and particle size integrity.
Required Equipment: Dry glovebox or nitrogen-purged enclosure, Ceramic mortar and pestle or ball mill, Analytical balance
- Prepare workspace
Set up a dry glovebox or nitrogen-purged enclosure to maintain an inert atmosphere below 10% relative humidity. - Weigh powder
Transfer the required amount of powder to a clean, dry container using an analytical balance. - Deagglomerate powder
Gently grind the powder with a ceramic mortar and pestle or ball mill to break up soft agglomerates without fracturing primary particles. - Blend with additives
Mix the deagglomerated powder with sintering aids or binders as required for your specific ceramic processing route. - Seal and store remainder
Return unused powder to an airtight container and store in a desiccator to prevent moisture uptake.
Why are alpha-phase content ≥93% and D50 <0.9 μm specified for this silicon nitride bearing-material powder?
These are the two primary powder specifications stated for this Si3N4 grade: alpha phase ≥93% and D50 <0.9 μm. The product is supplied for silicon nitride ceramic bearing and rolling-element materials research, and the defined phase proportion and fine particle size are cited as supporting ceramic rolling-element material processing.
What impurity and compositional limits are controlled in Atomfair 3N Si3N4 powder?
The 3N (99.9% purity) grade specifies Fe ≤500 ppm, Al ≤300 ppm, Ca ≤300 ppm, C ≤0.12%, free Si <0.3%, O ≤1.5%, and N ≥38.5%. These controlled Fe, Al, Ca, free-silicon, carbon, and oxygen specifications are listed as key features of this bearing-material-grade silicon nitride powder.
Is this silicon nitride powder a finished bearing material or a material for bearing research?
It is supplied as a powder, not as a finished bearing component. The stated application scope is silicon nitride ceramic bearing and rolling-element materials research, with the alpha-phase, D50, purity, and impurity specifications provided for evaluation in that research context.
This 3N Si3N4 powder for bearing materials combines an alpha-phase content of ≥93% with a D50 below 0.9 μm and controlled metallic and oxygen impurity levels, making it suitable for bearing-grade ceramic processing research; residual oxygen, free silicon, and alpha-phase lower-bound variation must be incorporated into sintering process design.
Positive
- High alpha-phase bearing-grade powder: With alpha phase ≥93%, the powder provides the phase composition required for silicon nitride bearing and rolling-element materials research, where alpha-phase content drives the microstructural transformation during sintering.
- Submicron D50 for densification: A D50 below 0.9 μm supplies fine starting particles suited to bearing-grade ceramic processing and supports uniform densification in controlled sintering studies.
Trade-offs
- Oxygen and free-silicon limits: With oxygen ≤1.5% and free silicon <0.3%, these residual impurities remain in the powder and must be accounted for when optimizing liquid-phase sintering and grain-boundary chemistry.
- Alpha-phase lower-bound variation: The ≥93% alpha-phase specification allows up to 7% beta phase, so batches near the lower bound may require customized sintering schedules to achieve consistent bearing microstructures.
Every advanced material, component, equipment, and instrument in our catalog is backed by rigorous testing. We maintain strict internal quality management frameworks and align with CE conformity metrics to deliver transparent, reproducible performance data via our public open-science repository.
To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.
Item is dispatched under the Atomfair Shipping & Delivery Framework (Free worldwide shipping on orders over $59 USD excl. heavy equipment). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).
