CG MATERIAL
Silicon Nitride Bonded Silicon Carbide (NBSC)
Silicon Nitride Bonded Silicon Carbide (NBSC)
Silicon Nitride Bonded Silicon Carbide (NBSC) is a composite material that is made by combining silicon carbide (SiC) particles with a silicon nitride (Si3N4) binder. This composite material offers a unique combination of properties that makes it ideal for use in various high-temperature industrial applications.
NBSC has excellent mechanical properties such as high strength, toughness, and wear resistance, which makes it a popular choice for use in abrasive and erosive environments. The silicon nitride binder also provides NBSC with excellent thermal shock resistance, allowing it to withstand rapid temperature changes without cracking or degrading.
Another advantage of NBSC is its excellent corrosion resistance. It is resistant to many types of acids, bases, and oxidizing agents, making it an ideal choice for use in harsh chemical environments. NBSC is also highly stable at high temperatures and can withstand temperatures up to 1400°C.
NBSC is commonly used in various high-temperature industrial applications, such as in the manufacturing of kiln furniture, crucibles, and other furnace components. It is also used in the production of molten metal handling components, such as immersion tubes and thermocouple protection tubes.
Overall, Silicon Nitride Bonded Silicon Carbide (NBSC) is a unique composite material that offers a combination of excellent mechanical, thermal, and chemical properties. Its high strength, toughness, and wear resistance make it an ideal choice for use in abrasive and erosive environments, while its thermal shock and corrosion resistance make it an ideal choice for use in high-temperature and harsh chemical environments.
Silicon Carbide Ceramics Properties
| Compound Formula | SiC |
| Molecular Weight | 40.1 |
| Appearance | Black |
| Melting Point | 2,730° C (4,946° F) (decomposes) |
| Density | 3.0 to 3.2 g/cm3 |
| Electrical Resistivity | 1 to 4 10x Ω-m |
| Poisson's Ratio | 0.15 to 0.21 |
| Specific Heat | 670 to 1180 J/kg-K |
Silicon Carbide Ceramics Specification
| CAS#: 409-21-2, Not Hazardous | |||
| Powder, F.W. 40.10, m.p. 2700 °C, Spec. Gravity 3.217 gm/cm3 | |||
| Item No. | Description | Purity | Lot Size |
| CB14-85 | Silicon Carbide Powder Particle Size:18, 30, 40 or 200 mesh |
> 85 % F.C. < 2.5%, Fe2O3 < 2%, Al2O3 < 1.2% |
Customize |
| CB14-90 | Silicon Carbide Powder Particle Size:18, 30, 40 or 200 mesh |
> 90 % F.C. < 1.5%, Fe2O3 < 1.2% |
Customize |
| CB14-98 | Silicon Carbide Powder Particle Size:18, 30, 40 or 200 mesh |
> 98 % F.C. < 0.6%, Fe2O3 < 0.7% |
Customize |
Silicon Carbide Ceramics Applications
Until the invention of boron carbide in 1929, silicon carbide was the hardest synthetic material known. It has a Mohs hardness rating of 9, approaching that of a diamond. In addition, SiC crystal has fracture characteristics that make them extremely useful in grinding wheels and in abrasive paper and cloth products.
Its high thermal conductivity, together with its high-temperature strength, low thermal expansion, and resistance to chemical reaction and thermal shock, makes silicon carbide valuable in the manufacture of high-temperature bricks and other refractories.
SiC ceramic is also classed as a semiconductor, having an electrical conductivity between that of metals and insulating materials. This property, in combination with its thermal properties, makes SiC a promising substitute for traditional semiconductors such as silicon in high-temperature applications.
Silicon Nitride Bonded Silicon Carbide Specifications
| >Chemical Composition |
Sic |
75% |
|
Si3N4 |
≥23% |
|
|
Free Si |
0% |
|
|
Bulk density (g/cm3) |
2.70～2.80 |
|
|
Apparent porosity (%) |
12～15 |
|
|
Bend strength at 20 oC (MPa) |
180～190 |
|
|
Bend strength at 1200 oC (MPa) |
207 |
|
|
Bend strength at 1350 oC (MPa) |
210 |
|
|
Compressive strength at 20 oC (MPa) |
580 |
|
|
Thermal conductivity at 1200 oC (w/m.k) |
19.6 |
|
|
Thermal expansion coefficient at1200 oC (x 10-6/oC) |
4.70 |
|
|
Thermal shock resistance |
Excellent |
|
|
Max. temperature (oC) |
1600 |
|
Silicon Nitride Bonded Silicon Carbide Applications
-NBSC is widely used in mining, petrochemical, red metal, monolithic cyclone liners, etc.
-NBSCbricks are applied in a range of process furnaces and kiln furnitures.
Packaging
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