Silicon Nitride Crucible
A Silicon Nitride Crucible is a high-temperature experimental and melting vessel crafted from high-performance silicon nitride ceramic. Renowned for its exceptional thermal shock resistance, high mechanical strength, and superior high-temperature stability, it maintains structural integrity under extreme thermal cycling. Compared to traditional quartz or alumina crucibles, silicon nitride crucibles offer significantly greater resistance to corrosion by molten metals, performing especially well when handling reactive metals, high-purity semiconductor materials, or precious metal melting. Additionally, their smooth, dense surface minimizes sticking and residue buildup, facilitating easy cleaning and reuse. They are an ideal choice for applications in metallurgy, semiconductor processing, crystal growth, and high-temperature chemical analysis.
- Custom and standard options available.
- Fast lead times guaranteed.
- High performance at a competitive price.
Silicon Nitride Crucible Data Sheet
| Purity: | ≥99% |
| Color: | Black |
| Chemical Formula: | Si3N4 |
| Material Grades: | HMSN1000, HMSN2000, HMSN3000, HMSN4000 |
| Density: | 3.20 g/cm3 |
| Dimension: | customized |
| Shape: | Cylinder, Conical Cylinder, Rectangular, T-shape, or customized. |
Silicon Nitride Crucible Description
The Silicon Nitride Crucible is an advanced ceramic container manufactured through reaction bonding or hot-pressing sintering processes, with its core material being α/β mixed-phase silicon nitride (Si₃N₄). Leveraging unique microstructural characteristics and chemical bonding properties, this product demonstrates exceptional comprehensive performance in extreme high-temperature environments: it maintains long-term usability above 1600°C, exhibits an ultra-low coefficient of thermal expansion (approximately 3.2×10⁻⁶/K), and can withstand thermal shocks of 1000°C-level rapid cooling/heating cycles without cracking. Its surface undergoes precision polishing to form a non-wetting interface that effectively suppresses melt adhesion.In metallurgical applications, silicon nitride crucibles are particularly suitable for melting titanium alloys, platinum-group precious metals, and high-purity silicon, demonstrating excellent chemical inertness toward most acid/alkaline media (except hydrofluoric acid). Through gradient structure design and interface modification technologies, the latest generation products have achieved perfect integration with silicon carbide coatings, extending service life to 5-8 times that of traditional zirconia crucibles in continuous casting scenarios. Standard specifications cover capacities from 50mL to 20L, with support for customized lining textures and slag-drainage structural designs.
Silicon Nitride Crucible Features
- Exceptional Thermal Shock Resistance – Withstands rapid temperature changes exceeding 1000℃ without cracking
- Ultra-High Temperature Tolerance – Sustained operation above 1600℃
- Superior Corrosion Resistance – Highly stable against most molten metals and acids/alkalis
- Non-Stick Surface – Precision-polished surface prevents melt adhesion
- Extended Service Life – 5-8 times longer lifespan than traditional ceramic crucibles
- Lightweight & High-Strength – Density 3.2-3.4 g/cm³ with excellent strength-to-weight ratio
Silicon Nitride Crucible Applications
- High-Purity Metal Melting: Refining of precious metals (Pt, Pd) and reactive metals (Ti)
- Semiconductor Material Processing: Crystal growth and purification of Si, GaAs, etc.
- High-Temperature Research: Reaction vessels for laboratory furnaces in material synthesis
- Special Alloy Production: Precision casting of Ni-based superalloys, Ti-Al alloys
- Glass Industry: Melting processes for specialty and optical glasses
- Ceramic Sintering: Contamination-free sintering of advanced ceramics
- Chemical Analysis: Corrosion-resistant containers for high-temperature experiments
- Vacuum Metallurgy: Refining of metal materials under vacuum/inert atmosphere
Silicon Nitride Ceramic Packaging
Silicon nitride ceramic products are typically packaged in vacuum-sealed bags to prevent moisture or contamination and wrapped with foam to cushion vibrations and impacts during transport, ensuring the quality of products in their original condition.
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- SAFETY DATA SHEET (SDS) -Silicon Nitride Crucible
FAQ
What is a Silicon Nitride Crucible?
A Silicon Nitride Crucible is a high-temperature container made from high-performance silicon nitride ceramic, specifically designed for extreme temperatures and corrosive environments. It is widely used in metal melting, semiconductor material processing, and high-temperature experiments.
What are the main advantages of a Silicon Nitride Crucible?
Key advantages include: exceptional thermal shock resistance (withstanding >1000℃ rapid temperature changes), ultra-high temperature tolerance (>1600℃), excellent resistance to chemical corrosion, a non-stick surface to melts, and a significantly longer service life compared to traditional ceramic crucibles.
Which metals is it suitable for melting?
It is particularly suitable for melting reactive metals (e.g., titanium, zirconium), precious metals (e.g., platinum, palladium, gold), high-purity semiconductor materials (e.g., silicon, gallium arsenide), and many special alloys. Caution is advised for use with certain strongly alkaline molten salts or hydrofluoric acid environments.
Can it be used with hydrofluoric acid (HF)?
No. Silicon nitride reacts with hydrofluoric acid. It is strictly prohibited for use in environments containing fluorine or HF.
How to choose the right size and type when purchasing?
Selection should be based on melt volume, furnace chamber dimensions, operating temperature, melt properties, and whether custom linings or slag-drainage structures are needed. Providing detailed operating conditions to the supplier is recommended for professional guidance.
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