new material
Silicon Nitride (Si₃N₄) is a high-performance ceramic material known for its exceptional mechanical properties, including high strength, excellent fracture toughness, and superior thermal stability. This compound is widely used in various industries, such as aerospace, automotive, and electronics, where it serves in critical components exposed to extreme environments. Its unique chemical composition and properties make it ideal for demanding applications requiring durability, reliability, and high performance.
Product Overview
Silicon Nitride (Si3N4) is a ceramic material with exceptional thermal stability and thermal shock resistance, widely used in high-temperature, corrosion-resistant industrial environments. It boasts superior mechanical and electrical properties, with a Mohs hardness of 8.5, making it resistant to most corrosive agents except dilute hydrofluoric acid and hot sulfuric acid. Silicon nitride can exist in three crystal phases: α, β, and γ. The α and β phases are common at room temperature, while the γ phase forms under high temperature and pressure.
Key Features
- Excellent Thermal Stability: Capable of withstanding high-temperature environments with outstanding thermal shock resistance.
- High Hardness: With a Mohs hardness of 8.5, it offers strong mechanical strength.
- High Electrical Resistivity: Excellent electrical insulation, making it ideal for applications requiring electrical isolation.
- Corrosion Resistance: Highly resistant to corrosion, only being attacked by dilute hydrofluoric acid and hot sulfuric acid.
- Multiphase Structure: The material exists in three crystal phases (α, β, γ), offering versatility for different application needs.
Applications
- Automotive Industry: Used in engine components to improve performance and high-temperature resistance.
- High-End Bearings: Silicon nitride bearings outperform metal bearings and are widely used in high-end mechanical equipment.
- High-Temperature Components: Applied in immersion heaters and components used in high-temperature working environments.
- Medical Replacement Parts: Used in medical devices, especially for replacing skeletal parts in the human body.
- Cutting Tools: Due to its high hardness, silicon nitride is ideal for high-precision and wear-resistant cutting tools.
- Electronics: Used in electronic shielding materials and in applications such as Insulated Gate Bipolar Transistors (IGBTs).
- Energy Equipment: Used in solar silicon crucibles and other energy production equipment.
- Aerospace: Silicon nitride is used in missile radomes and deep-sea exploration ceramic components for manned submarines.
- Thermal Energy Applications: Employed in phase-change thermal storage porous ceramics and thermally conductive substrates in energy-related applications.
| Property | Content |
| Molecular Formula | Si₃N₄ |
| CAS | 12033-89-5 |
| Density | 3.17 g/cm³ |
| Color | Gray |
| Refractive Index | 2.016 |
| Solubility | Insoluble |
