Silicon Nitride (Si3N4)
Silicon nitride ceramic has low thermal expansion coefficient, high thermal conductivity and excellent thermal shock resistance. In the very high temperature, silicon nitride keeps a high strength and impact resistance. As an excellent high temperature engineering materials, silicon nitride ceramics are “super hard” providing a high mechanical strength, outstanding wear and very good acid /alkali corrosion resistance. The material is self lubricated.
- Low-pressure cast aluminum industry: heating body protection tube, lift tube
- The photovoltaic industry: long crystal crucible, exhaust hood, heat shield
- The bearing industry: precision bearings ball, roller
- Others: mold holder, fusion furnace support, crucible rack, nozzle, insulation ring etc…
- High mechanical strength
Silicon nitride keeps high mechanical strength over a wide temperature range. The outstanding strength characteristics with relative low density make it easy to handle compared to conventional materials.
- Chemical stability
Silicon nitride is inert against molten metal even at high temperature. It ensures longer work life with minimum maintenance.
- Superior thermal shock resistance
Silicon nitride has exceptional high thermal shock resistance – making it ideal for applications with high dynamic stresses, thermal rigor, and demanding reliability requirements
Technical Characteristics – Silicon Nitride (Si3N4)
|High purity Si3N4||HS-100||HS-200|
|Flexural strength Room（MPa）||780||700|
|Thermal Conductivity (W/m•K)||20||35|
|Max. operating temperature Air (℃)||1200||1200|
|Max. operating temperature Inert Gas (℃)||1500||1500|
|Thermal shock resistance (K)||600||700|