Our NSiC tubes are manufactured with high-purity silicon carbide aggregates and silicon nitride bonding phase via high-temperature pressureless sintering technology, perfectly combining the high thermal conductivity & hardness of SiC and the ultra-strong thermal shock resistance of Si₃N₄.

Core Superior Performance

✅ Ultra High Temperature ResistanceContinuous long-term working temperature reaches 1450°C, peak instantaneous temperature up to 1500°C. No creep, softening or pulverization under persistent high-temperature oxidizing atmosphere; a dense protective oxide film forms automatically on the surface to extend service life dramatically.

✅ Unmatched Thermal Shock ResistanceLow thermal expansion coefficient brought by Si₃N₄ bonding phase enables the tube to withstand drastic temperature fluctuation. No cracking or breaking during frequent rapid heating & cooling cycles, effectively cutting your equipment downtime and replacement cost.

✅ Powerful Anti-Corrosion CapacityNon-wettable with molten aluminum, zinc, copper, magnesium and other non-ferrous metal melts. Resist erosion from high-temperature sulfur flue gas, strong acid, alkali and molten salt. No metal infiltration, no impurity contamination to casting products.

✅ Dense & Wear-Resistant StructureLow porosity compact sintered body with excellent air tightness. High Mohs hardness delivers outstanding anti-abrasion performance against molten metal scouring and high-temperature dust erosion. Uniform thermal conductivity ensures fast temperature response for temperature measurement & liquid transfer.

✅ High Mechanical Strength & Customizable SizesMaintain high bending strength both at room and high temperature. We support customized large-diameter extra-long straight tubes, flange-ended tubes, reducing sleeves and special-shaped casings with precise machining, cutting and beveling service.

Wide Application Industries

1. Non-Ferrous Metal Melting & Casting (Core Application)Riser tubes for low-pressure aluminum die casting, thermocouple protection sleeves for molten aluminum, aluminum liquid transfer pipes, degassing sleeves, high-temperature casings for zinc/magnesium/copper alloy smelting furnaces. Stable performance under 1450°C melting condition, no metal adhesion or penetration.

2. High-Temperature Industrial Heat Treatment KilnsRoller kilns, pusher kilns, bogie hearth furnaces, special ceramic firing kilns, refractory sintering furnaces. Widely used as temperature measuring protection tubes, burner sleeves, radiation tube liners and high-temperature flue pipes, stable under 1450°C long-term atmosphere environment without deformation.

3. Iron & Steel Metallurgy IndustryTemperature measuring sleeves for high-temperature steel annealing & quenching furnaces, sampling sleeves for molten steel, lining pipes for blast furnace hot air ducts, resistant to high-temperature oxidation and sulfur-containing flue gas corrosion.

4. New Energy Lithium & PV Material ManufacturingAtmosphere tubes and temperature measuring sleeves for high-temperature sintering of silicon-carbon anode powder, ceramic targets and photovoltaic raw powder. High-purity material without impurity precipitation, will not pollute raw materials during 1450°C sintering process.

5. Fine Chemical High-Temperature EquipmentHigh-temperature corrosion-resistant flue gas conveying pipelines, liners for molten salt reactors, diversion pipes for acid & alkali high-temperature reactions, ideal for harsh chemical working conditions up to 1450°C.

6. Glass & Advanced Special Ceramics ProductionTemperature measuring sleeves for glass melting furnaces, burner tubes for high-temperature firing kilns of special ceramics, resistant to corrosion from volatile glass substances and glaze vapor.

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Custom Service

Custom outer diameter, wall thickness, overall length, flange, bevel and reducing special shapes are available. Regular standard sizes in stock, large-diameter extra-long tubes customized on demand with tight dimensional tolerance, direct supply from our ceramic factory.