Silicon Nitride Heater Tubes
basic characteristics of Silicon Nitride Heater Tubes
Silicon nitride (Si₃N₄) heater tubes feature high-temperature resistance, thermal shock resistance, corrosion resistance and long service life. The application of Silicon nitride (Si₃N₄) heater tubes in aluminum casting mainly focuses on the indirect heating systems of high-end melting furnaces and holding furnaces. It achieves efficient and uniform heating of molten aluminum through radiant heat transfer, while avoiding the oxidation and hydrogen absorption problems caused by direct contact of combustion gases with molten aluminum.
application advantages in aluminum casting
Improve the purity of molten aluminum.
Isolate pollution sources: Prevent combustion exhaust gases (H₂O, CO₂) from coming into contact with molten aluminum, and prevent:
Hydrogen atom dissolution → pinhole defect
Alumina slag formation → Inclusion defects
Energy conservation and temperature uniformity.
High radiation efficiency: The emissivity of silicon nitride in the 800-1200°C band (ε≈0.9) is superior to that of metal tubes (ε=0.7-0.8).
Thermal field distribution: The temperature difference inside the furnace has been reduced from the traditional ±15°C to ±5°C, lowering the demand for melt overheating and reducing energy consumption by 10-20%.
Durability in extreme environments.
Extreme working condition durability (corrosion resistance/thermal shock resistance/long service life)
Its application must strictly follow the three major principles of progressive start-stop, flexible installation and atmosphere control
Reduce maintenance costs.
Lifespan comparison:
Heat-resistant steel radiant tubes: 6-12 months
Silicon nitride radiant tube: 3-5 years (actual test cases)
Reduce furnace downtime: Lower the replacement frequency by 70% to ensure continuous production.
Main application fields
Heat treatment industry: carburizing furnace, carburizing and nitriding furnace, quenching furnace, tempering furnace (high temperature), annealing furnace (special materials), sintering furnace (powder metallurgy, ceramics).
Semiconductor industry: Diffusion furnaces, CVD furnaces.
New materials industry: ceramic sintering, hard alloy sintering, lithium battery materials sintering.
Glass industry: melting, molding, annealing.
Related products
silicon nitride ceramic
*The above product pictures has been shipped by our company. Welcome to inquire
Established as a professional export enterprise, ANDA boasts 15 years of expertise in international trade and manufacturing excellence.
Our company operates a self-owned production facility spanning 10,000 square meters. Relying on the local industrial advantages of Zibo city, our company specializes in the production of advanced ceramic materials, including technical ceramics, wear-resistant ceramics etc.
Our team has rich experience in the ceramics materials industry,we use the most professional knowledge to help you solve any problems encountered in the ceramics materials industry.
Anda is committed to innovative and sustainable partnerships that continue to create value for customers around the world through reliable products and customer-centric services.
we are here for you
Hot Tags: silicon nitride heater tubes, China, suppliers, manufacturers, factory, customized, price
