Silicon Nitride (Si 3 N 4 )

Silicon Nitride (Si 3 N 4 )

Silicon nitride (Si 3 N 4 ) is a material with a high melting point, high fracture toughness, and excellent thermal stability. It is considered one of the few monolithic ceramic materials that can withstand the severe thermal shock and temperature gradient created by hydrogen and oxygen rocket engines.

Silicon nitride (Si3N4 ) is 60 % lighter than steel, yet strong enough to withstand some of the most demanding applications in a variety of industries. This lightweight, high-strength ceramic material is used as an alternative to stainless steel, superalloys, tungsten carbides, and first-generation ceramics such as Al2O3 and ZrO2 . It offers superior thermal shock resistance and fracture toughness, compatibility with non- ferrous metal melts , and increased structural reliability compared to other ceramic materials.

When extreme conditions like these push equipment to its limits, industrial ceramics made from silicon nitride (Si3N4 ) deliver high performance where other materials fail. Typical applications include high-power diesel engines, jet engine igniters, and oil wells thousands of feet underground.

Applications of silicon nitride:

• Foundries
• Electronics
• Oil and gas industry
• Automotive industry
• Aerospace industry

High precision silicon nitride ceramic balls, bearing roller, pump valve:

High precision silicon nitride ceramic balls, bearing roller, pump valve

Silicon nitride is processed using a gas-pressure sintering process, resulting in a completely dense and non-porous microstructure of interlocking needle-like grains. This, combined with silicon nitride's natural strength, ensures exceptional resistance to contact fatigue and mechanical reliability.

Protective sheaths for thermocouples

We offer a range of ceramic silicon nitride thermocouple sheaths and advanced ceramic thermocouple sheaths for use in the aluminum and molten metal processing industries. These advanced ceramic tubes provide outstanding temperature control performance in aluminum foundries and smelters, while being extremely cost-effective compared to competing materials such as cast iron, silicon carbide, and aluminum oxide.

Silicon nitride ceramic weld pins

Silicon nitride ceramic welding pins significantly increase service life and provide a high level of precision and accuracy over extended periods of time during protruding welds. Metal welding pins often require replacement several times a day due to wear and slag buildup, whereas silicon nitride ceramic centering pins only require replacement once a month.

Silicon nitride ceramic substrate for electronics

Silicon nitride ceramic substrate

Silicon nitride substrates, with a thermal conductivity of 90 W/m Kelvin, appear at first glance inferior to aluminum nitride grades in terms of heat dissipation. However, thanks to their significantly superior mechanical properties, silicon nitride substrates can provide a level of thermal resistance comparable to aluminum nitride.

Ceramic electric heating element made of silicon nitride

Silicon nitride heating elements are typically rectangular. These heaters have a large operating zone of up to 1000°C and a cold zone at the contact point. A sealed terminal prevents short circuits caused by conductive contamination. They can be operated with or without a controller. Silicon nitride heaters have several times the durability of silicon carbide heaters.