Silicon Nitride
Silicon nitride ceramic with excellent physical, chemical, and mechanical properties
Silicon nitride ceramics have outstanding advantages: low density, high temperature resistance, self-lubrication, corrosion resistance. Dense Si3N4 ceramics also exhibit high fracture toughness, high modulus properties and self-lubricity, which can be excellent resistance to a variety of wear and withstand harsh environments that can cause other ceramic materials to crack, deform or collapse, including extreme temperatures, large temperature differences, and ultra-high vacuum.
Main Applications Of Silicon Nitride Ceramics
Mechanical engineering: Silicon nitride ceramics have high hardness, excellent wear resistance and corrosion resistance, and are widely used in mechanical engineering fields. It can be used to manufacture parts such as bearings, seals, cutting tools and nozzles at high temperatures and speeds, providing excellent performance and long life.
Automotive industry: Due to the high temperature stability and wear resistance of silicon nitride ceramics, it is used in the manufacture of automotive engine components. Silicon nitride ceramics can be used to make high-performance engine parts such as piston rings, cylinder liners and valves, helping to improve fuel efficiency and reduce emissions.
Aerospace: The light weight, high strength and high temperature resistance of silicon nitride ceramics make them ideal materials for aerospace applications. It can be used to manufacture key components such as engine components, turbine blades, thermal isolation materials and spacecraft thermal protection to meet the requirements of high temperature, high pressure and extreme environments.
Chemical industry: Silicon nitride ceramics are widely used in the chemical industry due to their excellent chemical stability and corrosion resistance. Silicon nitride ceramics can be used to manufacture chemical reaction vessels, catalyst carriers, acid and alkali resistant equipment and pipes, and can withstand corrosive media and high temperature conditions.
Optoelectronics: Silicon nitride ceramics have excellent optical and electronic properties, so they have important applications in the field of optoelectronics. It can be used to manufacture high temperature and high power fiber amplifiers, lasers, optical communication devices and optical Windows...etc., with excellent optical transmittance and thermal stability.
| Test Item | Performance | |
| Density (g/cm3) | 3.2 | |
| Elastic Modulus (GPa) | 320 | |
| Poisson's Ratio | 0.24 | |
| Thermal Conductivity W/(m*k)Room Temp | 25 | |
| Coefficient Of Thermal | 2.79 | |
| Expansion( 10-6/K) (RT〜500°C) | ||
| Rupture Strength 3 Point (MPa) | 950 | |
| Weibull Modulus | 13.05 | |
| Vickers Hardness (HV10) Kg/mm | 1490 | |
| Fracture Toughness (KI,IFR) | 6.5〜6.6 | |
| Pore Size (gm) | ≤7 | |
| Mix(quantity/cm ) | 25-50 | 2 |
| 50-100 | 0 | |
| 100-200 | 0 | |
| >200 | 0 | |