Silicon Nitride Tubes & Rods
Inquiry NowProduct Description
Silicon Nitride Tubes & Rods – High-Strength Si₃N₄ Components for Extreme Environments
M-Kube supplies premium silicon nitride rods and tubes across Australia, manufactured from Si₃N₄ ceramics for applications requiring high strength, low thermal expansion, and excellent corrosion resistance. With outstanding thermal shock resistance and durability, these components are ideal for laboratories, metallurgy, energy research, and semiconductor processing.
Whether you require a silicon nitride rod, a precision silicon nitride tube, or a specialised SN3998 silicon nitride rod, M-Kube provides reliable and cost-effective solutions tailored to your application.
Key Features of Silicon Nitride Tubes & Rods
- Manufactured from high-purity Si₃N₄ ceramic
- High mechanical strength with fracture toughness of 7–9 MPa·m¹/²
- Excellent thermal shock resistance – withstands rapid temperature changes
- Non-magnetic and chemically stable
- Available in reaction-bonded rods or fully sintered options
Technical Specifications: Silicon Nitride Tubes & Rods
| Item | Si3N4 |
| Si3N4 (%) | >99.5 |
| C+ TiO2 + Fe2O3 + SiO2 | <0.5% |
| Bulk Density (g/cm3) | 3.26 +/- 0.02 |
| Elastic modulus (GPa) | 300～320 |
| Bending strength (MPa) | 900～1000 |
| Hardness (GPa) | 18 – 20 |
| Fracture toughness (MPa•m1/2) | 7.0～9.0 |
| Specific resistance ratio | 10 18 |
| Poisson’s ratio | 0.25 |
| Linear expansion coefficient 10-6K-1 | 3.1～3.3 |
| Weibull modulus | 12～15 |
| Thermal conductivity W•（m•K)-1 | 15~20 |
| Thermal shock resistance | Excellent |
| Corrosion resistance | Excellent |
| Size stability | Excellent |
| Magnetic | NO |
Applications of Si₃N₄ Tubes & Rods
Our silicon nitride ceramic rods and tubes are widely used in:
- Metallurgy & Foundries – protection tubes, immersion components, and thermocouple sheaths
- Laboratories – Si₃N₄ ceramic rods for high-temp testing and research
- Energy & Automotive – fuel cells, battery development, and engine components
- Semiconductors & Electronics – precision components with low thermal expansion
- Chemical Industry – resistance against molten metals, acids, and alkalis
Available Variants in Silicon Nitride
- Silicon Nitride Rods – standard and SN3998 silicon nitride rods for high-performance use
- Silicon Nitride Tubes – available in closed or open-end configurations
- Reaction-Bonded Rods (RBSN) – cost-effective option with good thermal and mechanical properties
- Custom Si₃N₄ Components – machined to specification for specialised projects
Why Choose M-Kube – Silicon Nitride Tube & Rod Supplier in Australia?
- Supply of Si₃N₄ tubes and rods with high strength and purity
- Options in reaction-bonded and sintered silicon nitride
- Competitive pricing with bulk and small-lot supply
- Fast Australia-wide delivery
- Local technical support for custom designs
At M-Kube, all our ceramic and refractory products are manufactured in ISO-certified facilities with the capability to meet and comply with ASTM, ISO, and other international standards. This ensures every product delivers consistent quality, reliability, and performance, whether you require standard parts or fully customized solutions.
Buy Silicon Nitride Rods & Tubes in Australia – Request a Quote
Looking for a silicon nitride rod, silicon nitride tube, or an SN3998 Si₃N₄ rod? M-Kube provides durable Si₃N₄ ceramic rods and tubes designed for demanding environments.
📞 Call +61-478-594-746
📧 Email info@mkube.com.au
For expert advice or to discuss your custom silicon nitride tube and rod requirements, contact M-Kube today.
Product FAQ's
What is the difference between a silicon nitride rod and a silicon nitride tube?
- Silicon nitride rod → Solid component, ideal for structural, mechanical, and wear-resistant applications.
- Silicon nitride tube → Hollow component, mainly used for thermocouple protection, heating element insulation, and furnace applications.
Both share the same Si3N4 ceramic properties, but application depends on geometry.
Can silicon nitride rods be customized?
Yes — silicon nitride rod suppliers can provide:
- Custom diameters and lengths
- Precision-ground or polished surfaces
- Hollow designs (tubes) or solid rods
- Special grades such as SN3998
A trusted Si3N4 ceramic rod supplier can also machine complex geometries.
Are silicon nitride rods electrically insulating?
Yes — unlike metals, silicon nitride rods are electrically insulating while maintaining high thermal conductivity, making them ideal for semiconductors, heaters, and high-voltage applications.
How much does a silicon nitride rod cost?
The price of a silicon nitride rod depends on:
- Grade (standard, SN3998, reaction bonded)
- Dimensions (diameter, length)
- Surface finish (as-sintered vs. precision ground)
- Quantity (single piece vs. bulk order)
Generally, reaction bonded rods are more cost-effective, while SN3998 rods command premium pricing.
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