Silicon Nitride Crucible
The strength of silicon nitride, especially hot-pressed silicon nitride, is one of the hardest substances in the world.
Premium Silicon Nitride Crucibles for Demanding Applications
Superior Chemical Resistance & Thermal Stability
Our high-performance silicon nitride crucible is manufactured using advanced gas pressure sintering technology, delivering exceptional durability in corrosive environments.
Outstanding Chemical Resistance
Withstands aggressive acids, including:
Boiling hydrochloric acid
Concentrated nitric acid
Aqua regia
Sulfuric acid
Aluminum hydroxide solutions (<25% concentration)
Resists weak alkaline corrosion
Exceptional Thermal Properties
Maintains structural integrity in oxidizing atmospheres up to 1200°C
Excellent oxidation resistance for high-temperature applications
Metal Processing Advantages
Non-wetting surface for superior metal handling
Compatible with molten metals, including:
Zinc, gold, silver, aluminum
Cadmium, indium, lead, bismuth
Gallium, germanium
Resistant to alloy corrosion from:
Brass (yellow copper)
Duralumin (hard aluminum)
Nickel silver
Silicon Nitride Crucibles Description
| item | Unit | Si3N4 |
| Physical Property | ||
| Color | \ | Gray Black |
| Density | g/cm3 | >3.2 |
| Mechanical properties | ||
| Rockwell hardness | HRA90 | |
| Vickers hardness (Hv50) | HV0.5 | >1550 |
| Elastic modulus (20℃) | Gpa | 290 |
| Bending strength(20℃) | Mpa | >600 |
| Compressive strength (20℃) | Mpa | 2500 |
| Fracture toughness (20℃) | Mpam1/2 | >6.0 |
| Thermal properties | ||
| Thermal conductivity | W/(m·K) | 15-20 |
| Coefficient of thermal expansion（20℃-1000℃） | 10-6K-1 | >3.1 |
| Thermal shock stability | △T℃ | 500 |
| Specific heat capacity | KJ/kg.K | 700 |
| Maximum operating temperature（in air） | ℃ | 1200 |
| Electrical properties | ||
| Dielectric strength (insulation strength) | KV/mm | 1 |
| Volume resistance (20℃) | Ω.cm | 10^12 |
* Tests under room temperature environment;
* The above information is offered for comparison only. Exact properties will vary depending on the manufacturing method.
Silicon Nitride Ceramic Crucibles: Superior Material for Extreme Conditions
Key Properties of Silicon Nitride Ceramics
Engineered for exceptional performance in demanding environments, silicon nitride ceramics offer unique advantages:
Mechanical Strength & Durability
✔ High strength maintained across extreme temperature ranges
✔ Exceptional fracture toughness for impact resistance
✔ Extreme hardness comparable to premium tool steels
✔ Superior wear resistance for long service life
Thermal Performance
✔ Low thermal expansion minimizes stress during heating/cooling
✔ High thermal conductivity for efficient heat distribution
✔ Excellent thermal shock resistance withstands rapid temperature changes
Chemical Stability
✔ Resistant to oxidation and corrosion
✔ Performs reliably in harsh chemical environments
Industrial & Scientific Applications
1. Laboratory Research
Essential for high-temperature experiments in chemistry & material sciences
Preferred crucible material in university and R&D labs
2. Industrial Metal Processing
Melting container for non-ferrous metals (Al, Cu, Zn) and alloys
Withstands extreme conditions in foundries and smelting operations
3. High-Temperature Furnace Components
Ideal for glass melting and special alloy production
Maintains integrity in continuous 1200°C+ operations
4. Chemical Processing Equipment
Corrosion-resistant reaction vessels for aggressive chemicals
Reliable performance in acid/alkaline environments
Why Choose Silicon Nitride?
Longer lifespan than alumina or zirconia alternatives
Minimal contamination risk for pure melts
Energy-efficient thermal properties
Optimized for technical buyers and engineers with keyword-rich, natural language that highlights performance benefits.
Contact us today to select the right silicon nitride solution for your application.
Packing of silicon nitride crucible
As a ceramic material, silicon nitride is quite fragile in a lot of cases. Our Silicon Nitride Crucibles are carefully handled to minimize damage during storage and transportation. Suitable outer boxes and inner cushioning materials are used for Si3N4 products, vacuum packing is also engaged for some of the parts.
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