Custom Silicon Nitride Si3N4 Ceramic Support Fixture High Temp Furnace Holder

■ Outstanding High-Temperature Resistance & Thermal Stability
The Si₃N₄ ceramic support maintains stable structural performance at high temperatures, with a maximum working temperature of 1,300°C in oxidizing atmosphere and up to 1,600°C in neutral atmosphere. It retains high mechanical strength and creep resistance under long-term high-temperature operation, avoiding deformation, cracking or performance attenuation, far exceeding traditional metal materials and ordinary ceramics.
■ Excellent Thermal Shock Resistance & Low Thermal Expansion
Boasting a low thermal expansion coefficient (2.95~3×10⁻⁶/°C) and superior thermal shock resistance, the holder can withstand rapid temperature rise and fall without structural damage. It effectively relieves thermal stress during frequent temperature cycle operations, ensuring long-term dimensional stability and service reliability.
■ Ultra-High Mechanical Strength & Wear Resistance
With a density of 3.2~3.25 g/cm³, flexural strength of 600–900 MPa and hardness of 14–16 GPa (HRA 92–94), the silicon nitride ceramic holder features exceptional compression resistance, impact resistance and abrasion resistance. It resists mechanical friction and fatigue wear, greatly extending service life in high-load working scenarios.
■ Superior Chemical Corrosion Resistance & Insulation
The product features excellent acid and alkali corrosion resistance, resisting erosion of most chemical media such as molten metal, acid and alkali solutions. Meanwhile, it has reliable electrical insulation performance and excellent diffusion barrier property, which can effectively isolate circuits and prevent current leakage, adapting to strict electronic and semiconductor working environments.
■ Low Molten Metal Wettability
It is hardly wetted by molten aluminum and other molten metals, effectively avoiding adhesion and scaling during high-temperature metal processing, which simplifies cleaning and maintenance and improves production continuity.

Main Applications:

High-temperature furnace protection tubes, thermocouple insulating sleeves, metallurgical molten metal conveying and shielding tubes, semiconductor thermal processing equipment, new energy high-temperature modules, chemical anti-corrosion piping and industrial high-temperature insulating structural parts.