Silicon Nitride Ceramic protection Tube Precision Machining High Temp Resistant

Silicon nitride (Si3N4) is a high melting point ceramic material with extremely high hardness and chemical inertness. Especially hot-pressed silicon nitride is one of the hardest substances in the world. Silicon nitride ceramics have a low coefficient of thermal expansion and high thermal conductivity, so they have excellent thermal shock resistance. Silicon nitride has high strength and impact resistance at not too high temperatures. However, when used above 1200°C, it will be damaged with the increase of service time, reducing its strength.