MJ3SN-80 Silicon Nitride (Si3N4) Jar with Stainless Steel Jacket for SFM-3 & SFM-3-II Milling Machines
The MJ3SN-80 jar is designed for high-precision milling tasks requiring contamination-free processing, especially suited for air-sensitive or inorganic materials. It fits the MSK-SFM-3, MSK-SFM-3-F, and MSK-SFM-3-II milling machines, providing an abrasion-resistant alternative to zirconia jars. This jar’s silicon nitride composition ensures minimal wear and prevents iron or other inorganic contamination during milling.
Constructed from high-purity (>99.99%) silicon nitride with a hardness exceeding 8.5 Mohs and a density of approximately 3.7 g/cm³, the jar is encased in a stainless steel jacket to enhance durability and provide an air-tight seal. Two O-rings are included to maintain an inert atmosphere inside the jar, making it ideal for milling air-sensitive samples. The jar has an actual capacity of 84 ml, accommodating a variety of sample volumes.
Key Features
- Made from high-purity silicon nitride (Si3N4) with superior abrasion resistance compared to zirconia
- Stainless steel jacket provides mechanical protection and supports air-tight sealing
- Includes two O-rings for secure, air-tight closure suitable for air-sensitive materials
- Compatible with MSK-SFM-3, MSK-SFM-3-F, MSK-SFM-3-II, MSK-SFM-1S, and MSK-SFM-GB milling machines
- Comes with a set of silicon nitride milling balls: 4 pcs 10mm, 8 pcs 8mm, and 9 pcs 5mm diameter
- Actual jar volume of 84 ml for versatile sample milling
- Lightweight design at 1.6 lbs for easy handling
Technical Specifications
| Parameter | Specification |
|---|---|
| Material | Silicon Nitride (Si3N4), purity >99.99% |
| Hardness | > 8.5 Mohs |
| Density | ~3.7 g/cm³ |
| Capacity | 84 ml (actual volume) |
| Included Accessories | 1 Si3N4 jar with stainless steel jacket, 2 O-rings, 21 Si3N4 balls (4×10mm, 8×8mm, 9×5mm) |
| Compatible Milling Machines | MSK-SFM-3, MSK-SFM-3-F, MSK-SFM-3-II, MSK-SFM-1S, MSK-SFM-GB |
| Weight | 1.6 lbs (approximate) |
Typical Applications
This jar is ideal for milling powders and materials that require contamination-free processing, such as air-sensitive compounds or inorganic substances where iron contamination must be avoided. Its abrasion resistance makes it suitable for prolonged milling cycles without significant wear.
Configuration & Operating Notes
- To minimize contamination, fill the jar to about one-third volume with powder before milling.
- Initial milling at low speed is recommended to allow sample coating on jar and balls, followed by higher speed milling.
- For air-sensitive materials, loading the jar and balls inside an inert gas glovebox is advised before milling in ambient conditions.
