Silicon Nitride Bearing Balls
Silicon nitride bearing balls are lightweight, hard, electrically insulating rolling elements for high-speed and electrically sensitive bearing systems.
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Product Family
Silicon Nitride Components for Casting, Thermal and Precision Applications
Choose silicon nitride components by function: temperature sensing, heater protection, molten-metal transfer, melt treatment or mechanical service. Protection tubes, casting stalks and rotating parts need different interface and operating information. Structural Si3N4 components are grouped here; electronic ceramic substrates have a separate product range and selection criteria.
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Alumina Ceramic Products
Zirconia Ceramic Products
Silicon Carbide Products
View categorySilicon Carbide Mechanical Seal RingsSilicon Carbide Ceramic ArmsSilicon Carbide Cantilever PaddlesSilicon Carbide Ceramic TubesSilicon Carbide Ceramic PlatesSilicon Carbide NozzlesSilicon Carbide CruciblesSilicon Carbide Furnace TubesSilicon Carbide Custom ComponentsSilicon Carbide SleevesSilicon Carbide TraysSilicon Carbide Vacuum ChucksSilicon Carbide Wear Linings
Silicon Nitride ProductsCurrent
View categorySilicon Nitride Degassing RotorsSilicon Nitride Heater Protection TubesSilicon Nitride PlatesSilicon Nitride Positioning PinsSilicon Nitride Riser Tubes / StalksSilicon Nitride Bearing BallsSilicon Nitride BearingsSilicon Nitride SleevesSilicon Nitride Structural ComponentsSilicon Nitride Thermocouple Protection Tubes
Aluminum Nitride Products
Material Overview
Silicon Nitride (Si₃N₄) ceramics, particularly Gas Pressure Sintered (GPS) grades, are high-performance technical ceramics engineered for extreme mechanical, thermal and corrosive environments.
Manufactured from high-purity α-phase Si₃N₄ powder (>90%) with sintering aids (Y₂O₃–Al₂O₃), the material is formed by dry pressing or cold isostatic pressing (CIP), then sintered under nitrogen gas pressure. This process promotes β-Si₃N₄ whisker growth and achieves full densification.
Key strengths include high density (3.20–3.26 g/cm³), very low porosity (0–0.2 %), outstanding flexural strength (700–900 MPa), excellent fracture toughness and superior thermal shock resistance.
A defining advantage for the aluminum casting industry is the non-wetting and non-reactive behavior toward molten aluminum — molten aluminum does not adhere to the surface, significantly reducing aluminum loss, build-up and clogging while providing excellent corrosion resistance against molten aluminum and certain molten salts.
We also supply porous silicon nitride-bonded silicon carbide (Si₃N₄-SiC) filter materials with interconnected open pores for molten metal filtration.
Material Grades & Variants
Typical properties by material route.
| Grade / Variant | Composition / Type | Key Characteristics | Typical Applications |
|---|---|---|---|
| Gas Pressure Sintered Silicon Nitride (GPS Si₃N₄) — primary high-performance dense grade | Gas Pressure Sintered Silicon Nitride (GPS Si₃N₄) — primary high-performance dense grade | Source-recorded material route; supplier-specific values require verification. | Application-dependent |
| Reaction-Bonded / other sintered Si₃N₄ variants | Reaction-Bonded / other sintered Si₃N₄ variants | Source-recorded material route; supplier-specific values require verification. | Application-dependent |
| Silicon Nitride-bonded Silicon Carbide (Si₃N₄-SiC) porous grades for filtration | Silicon Nitride-bonded Silicon Carbide (Si₃N₄-SiC) porous grades for filtration | Source-recorded material route; supplier-specific values require verification. | Application-dependent |
Products
Silicon Nitride Degassing Rotors
Silicon Nitride Degassing Rotors are core purification components used in aluminum melting and casting processes.
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Silicon Nitride Heater Protection Tubes
Silicon Nitride Heater Protection Tubes are high-performance ceramic sleeves designed to protect electric heating elements (resistance wires, SiC rods, MoSi₂ rods, etc.) from high temperature, corrosion, oxidation and mechanical damage in harsh industrial environments.
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Silicon Nitride Plates
Silicon Nitride Plates are high-performance fully dense ceramic plates manufactured by isostatic pressing and high-temperature sintering.
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Silicon Nitride Positioning Pins / Ceramic Dowel Pins for Projection Welding
Silicon Nitride Positioning Pins (also known as ceramic dowel pins or locating pins) are precision components designed for accurate positioning of weld nuts and studs in projection welding and resistance welding fixtures.
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Silicon Nitride Riser Tubes / Stalks
Silicon Nitride Riser Tubes (Stalks) are critical components used in low-pressure die casting of aluminum and other non-ferrous metals.
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