Silicon nitride tube is a ceramic tube made mainly of silicon nitride material, with excellent mechanical, thermal, and chemical properties and is widely used in harsh environments such as high temperature, corrosion, and wear.
Brief
Silicon nitride tube is a ceramic tube made mainly of silicon nitride material, with excellent mechanical, thermal, and chemical properties and is widely used in harsh environments such as high temperature, corrosion, and wear.
Details
Silicon Nitride is an important structural ceramic material with high hardness, inherent lubricity, and wear resistance. It is an atomic crystal; Antioxidant at high temperatures. And it can also resist cold and hot shocks. When heated to over 1000 ℃ in the air, it will not crack even after rapid cooling and heating.
Specific Applications:
Aluminum casting industry, zinc processing and other metal casting industries;
Welding pins, plungers, nozzles, guide rails, internal combustion engine parts, bearing rollers, etc.
Characteristics：
Parameter
| Technical Data of Silicon Carbide (SIC) | ||||
| Item | gas pressure sintering | hot pressing sintering | reactive sintering | pressureless sintering |
| Rockwell hardness (HRA) | ≥75 | - | ＞80 | 91-92 |
| volume density(g/cm3) | 3.25 | ＞3.25 | 1.8-2.7 | 3.0-3.2 |
| Dielectric constant (εr20℃，1MHZ) | - | 8.0(1MHz) | - | - |
| electric volume resistivity(Ω.cm) | 10¹⁴ | 10⁸ | - | - |
| breaking tenacity（Mpa m1/2） | 6-9 | 6-8 | 2.8 | 5-6 |
| Elasticity modulus（GPa） | 300-320 | 300-320 | 160-200 | 290-320 |
| thermal expansivity（m/K *10-6/℃） | 3.1-3.3 | 3.4 | 2.53 | 600 |
| thermal conductivity(W/MK) | 15-20 | 34 | 15 | - |
| weibull modulus（m） | 12-15 | 15-20 | 15-20 | 10-18 |
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