Si3n4 Balls PTFE Cage Hybrid Ceramic Bearing 681 691
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 sic thermocouple protection tube, ceramic fiber webbing tape, dryer heating element cost have strong competitiveness, high cost performance and strong market adaptability. With leading research and development capabilities and rigorous production industry, we enjoy a high reputation in the domestic industry. We recognize that collaboration with one another and with the group is essential for our success. The company takes "pioneering, dedication, integrity and effectiveness" as the spirit of enterprise.
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 have a complete network system and efficient operation and management capabilities, and we have the core competitive advantage of leading the Si3n4 Balls PTFE Cage Hybrid Ceramic Bearing 681 691 industry. We continue to strengthen the innovation drive, accelerate the transformation and upgrading, and achieve high-quality development of the enterprise. Our staff development plan this year includes some technical training courses to help them improve their skills.
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