High purity and strength good thermal conductivity silicon nitride ceramic rod
Features
1. Long service life
2. Sintering: GPSN/RSSN (gas pressure sintering, reaction sintering)
3. Good abrasive resistance
4. Excellent thermal shock resistance
5. Top refractory
6. Reduced maintenance requirements and ease of maintenance
7. Anti-corrosion in the high-temperature
8. Perfect electrical insulation resistance
9. Customization available
Advantages
Silicon nitride ceramic is a kind of superhard material, which has lubricity and wear resistance. It does not react with other inorganic acids except hydrofluoric acid (reaction equation: Si3N4+4HF+9H2O=====3H2SiO3 ( Precipitation) +4NH4F), strong anti-corrosion ability, anti-oxidation at high temperature. Moreover, it can withstand cold and hot shock, and is heated to above 1 000℃ in air, and is rapidly cooled and heated rapidly without breaking.
Product Description
Silicon nitride (Si3N4) feature an excellent combination of material properties. They are nearly as light as silicon carbide (SiC), but their microstructure gives them excellent thermal shock resistance and their high fracture toughness makes them resistant to impacts and shocks.
Its applications as balls and rolling elements for light and extremely precise bearings, heavy-duty ceramic forming tools and automotive components subject to high stress. And the good thermal shock resistance and high temperature resistance is exploited in welding processes.
| Bulk density | Kg/m3 | 3.2×103 |
| Water absorption | % | 0 |
| Mechanical properties | Vickers hardness load 500g | (GPa) | 13.9 |
| | Flexural strength | MPa | 610 |
| | Compressive strength | MPa | 3820 |
| | Young's modulus of elasticity | GPa | 290 |
| | Poisson's ratio | - | 0.28 |
| | Fracture toughness | MPa√m | 5 |
| Thermal characteristics | Linear thermal expansion coefficient | 40-400℃ | ×10-16/℃ | 2.6 |
| | | 40-800℃ | | 3.2 |
| | Thermal conductivity | W/(m·K) | 20 |
| | Specific heat | J/(kg·K) | 0.66×103 |
| | Thermal shock resistance(Put into the water) | ℃ | 550 |
| Electrical characteristics | Dielectric strength | V/m | 10×106 |
| | Volume resistivity | 20℃ | Ω·cm | ＞1014 |
| | | 300℃ | | 1012 |
| | | 500℃ | | 1010 |
| | Dielectric constant (1MHz) | - | - |
| | Dielectric loss angle (1MHz) | (×10-4) | - |
| | Loss factor | (×10-4) | - |
| Chemical properties | Nitric acid (60%) 90℃ | WT Loss Mg/cm2/day | 1.00 |
| | sulfuric acid (95%) 95℃ | | 0.40 |
| | Sodium hydroxide (30%) 80℃ | | 0.36 |
Packing and Delivery
We pack our goods in wooden case.
We send goods by Sea/Air/Express timely and saftely.
Product Tags:
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High Purity Silicon Nitride Ceramic Thermal Conductivity , Strengthful Ceramic Heating Rod Images
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