
Si3n4 Ceramic Wear Resistance Silicon Nitride Full Ceramic Ball Bearing
Si3N4 Ceramics is a new type of non-metallic ceramic material. It is characterized by high strength at room temperature and high temperature, and the strength of Si3N4 can be maintained at 1200 ℃.
Our company hopes that with the support and help of new and old customers, through the joint efforts of all employees, we will continuously improve product quality and innovate technology to provide the best dcs ceramic tube radiants, alumina ceramic tiles china, ceramic fiber tape filament. The company actively practices the cultural concept of "starting from the details and moving towards happiness". We insist on high-quality development, implement strategic and precise management, and establish core industries. Corporate culture is the wisdom and crystallization of our company, representing our calmness and self-confidence, and is the inheritance of spirit, sublimation of thought, interpretation of philosophy, outline of strategy and guidance of development direction.
Product Description
Si3N4 Ceramics is a new type of non-metallic ceramic material. One of the popular product of Si3N4 ceramics is Si3N4 tube. The tubes are mainly used in conjunction with thermocouples to protect them. It allows the thermocouple to operate properly in special environments and to resist high pressures and high flow rates.
Process Method
It uses silicon powder as raw material and is first made into the desired shape using the usual molding method. Initial nitriding is done in nitrogen at 1200°C, so that part of the silicon powder reacts with nitrogen to form silicon nitride. This way the whole body already has some strength. It is then nitrided a second time in a high-temperature furnace at 1350°C to 1450°C to react with the silicon nitride.
Specifications
Thermocouple protection tube: diameter Φ12-80mm, length 600-1800m

Data Sheet
Items | Data |
Sintering method | gas pressure sinter |
Density | >3.2g/cm3 |
Si3N4 content | >92% |
Flexural strength | >750Mpa |
Compressive strength | >1500Mpa |
Thermal conductivity (W/mk) | >22 |
Porosity | 0 |
Thermal expansion coeff. (RT-1000℃) | 3.2 |
Max temperature in air | 1400℃ |
Hardness (HRA) | >92 |
Q&A
1. How long is the service time of Si3N4 ceramics?
It will be different as per your application. The general period is 25-30days.
2. What is the payment terms?
Our payment terms are T/T, L/C or as per your request.
We always pay attention to the market trend, constantly develop new Si3n4 Ceramic Wear Resistance Silicon Nitride Full Ceramic Ball Bearing to meet the needs of customers, pay attention to product quality and improve customer satisfaction. We are actively looking for low-cost, good quality production technology and reliable equipment. Professional technical team and standardized management system are the powerful guarantee of high precision and high quality of our products.
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