High Speed Si3n4 Ceramic Ball Bearing 628 628zz Hybrid Ceramic Bearings for Japan NSK Brand
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 ℃.
We recognize that reasonable adjustment of Ceramic Fiber Textile, Silicon Nitride Heater Tubes, high alumina ceramic balls structure to fully meet the needs of consumers can promote further prosperity of the market. Through our sincere attitude and professionalism, we provide our customers with attentive, thoughtful, sincere and professional services. We always make unremitting efforts to introduce and cultivate talents, and pay attention to the training and learning of employees and the improvement of technical skills. We have established close cooperation with many research and technology centers and strive to improve our own development in order to enhance the industry's ability to transform and upgrade.
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.
Our High Speed Si3n4 Ceramic Ball Bearing 628 628zz Hybrid Ceramic Bearings for Japan NSK Brand have been sold all over the country and overseas, and we will improve the level of creation of this product, as well as the perfect quality to serve customers. We meet customer needs with high-quality, efficient, flexible and diverse production and supply, effective cost control, and strong financial support. We have made remarkable achievements in terms of industrial scale, service scope, product technology content and technological innovation.
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