What is Silicon carbide β-SiC?
Silicon carbide has two types. Alpha Silicon Carbide (α-SiC) and Beta Silicon Carbide (β-SiC) are the two main types of Silicon Carbide, and there are several differences in their crystal structures, physical properties, and uses.
Crystal structure of silicon carbide:
Alpha silicon carbide is a hexagonal crystal form that appears dark gray, the most common form of silicon carbide. Beta silicon carbide is a cubic crystal form known as cubic silicon carbide or beta-SiC.
Physical Properties of Silicon Carbide β-SiC:
Beta Silicon Carbide is more complex than Alpha Silicon Carbide, even higher than Diamond, and has a better finish. Beta Silicon Carbide has better self-sharpening and grinding properties than Alpha Silicon Carbide and is suitable for precision grinding and polishing.
Uses of Silicon Carbide:
Alpha Silicon Carbide is mainly used to produce Green Silicon Carbide and Black Silicon Carbide, which are essential raw materials for manufacturing diamond tools. Alpha Silicon Carbide remains the industry's most widely used type of silicon carbide due to its low hardness and cost. Beta silicon carbide is used primarily in the more technically demanding refractory, grinding and ceramics industries.
Beta Silicon Carbide, or Beta-SiC, is a compound composed of carbon and silicon with a face-centered cubic crystal structure. It is a material characterized by high hardness, high thermal conductivity, low coefficient of thermal expansion and excellent chemical stability. It is widely used in electronics, machinery, aerospace and other fields.
Characteristics of beta silicon carbide β-SiC
High hardness: β silicon carbide is more complex than traditional silicon carbide ceramics, with more substantial wear and corrosion resistance.
High thermal conductivity: βSiC has a higher thermal conductivity than traditional silicon carbide ceramics, making it an excellent thermal conductivity material for heat dissipation in electronic devices.
Low Coefficient of Thermal Expansion: With a lower coefficient of thermal expansion than traditional silicon carbide ceramics, beta silicon carbide has better thermal stability and can be used in high-temperature environments.
Excellent chemical stability: Beta silicon carbide has excellent chemical stability and can maintain stable performance at high temperatures and in corrosive environments.
Technical Parameter of Silicon Carbide Nanoparticles Nano SiC Powder:
| Particle size | SiC (%) | Crystalline phase | Fe2O3(%) | F.C (%) | F.Si (%) | T.O |
| 60nm | ≥97.0 | β | ≤0.13 | ≤0.8 | ≤0.69 | ＜1.4 |
| 300nm | ≥99.0 | β | ≤0.03 | ≤0.2 | ≤0.15 | ＜0.8 |
| 500nm | ≥99.0 | α、β | ≤0.03 | ≤0.2 | ≤0.15 | ＜0.8 |
| 1-3μm | ≥99.0 | α、β | ≤0.03 | ≤0.2 | ≤0.15 | ＜0.8 |
| 325mesh | ≥99.0 | α、（α β mixed） | ≤0.03 | ≤0.2 | ≤0.15 | ＜0.8 |
| Whisker | ≥99.0 | - | ≤0.03 | ≤0.2 | ≤0.15 | ＜0.8 |
| other β SiC and α SiC for micro size (0-100um) are available | ||||||
Applications of beta silicon carbide β-SiC
Electronics: Because of its high thermal conductivity and low coefficient of thermal expansion, beta-silicon carbide is widely used in the packaging and heat dissipation of semiconductor devices. For example, βSiC can be used as a packaging material for high-power LED devices to improve their heat dissipation performance and reliability. In addition, beta-silicon carbide can be used to manufacture substrates and circuit boards for electronic devices.
Mechanical field: Due to its high hardness and excellent wear resistance, βSiC is widely used to manufacture mechanical parts. For example, βSiC can manufacture high-precision mechanical components such as cutting tools and drills to improve service life and reliability. In addition, βSiC can manufacture high-temperature bearings, thrust bearings and other high-temperature mechanical parts.
Aerospace field: β-SiC is widely used due to its excellent chemical stability and high-temperature performance. For example, beta-silicon carbide can manufacture blades and other high-temperature parts for high-temperature gas turbines to improve reliability and service life. In addition, βSiC can manufacture shells and internal structural components of spacecraft.
Other fields: In addition to the above applications, beta silicon carbide can also be used to manufacture high-temperature equipment such as high-temperature stoves, high-temperature sensors and high-temperature shields, as well as in the manufacture of sports equipment such as golf clubs and baseball bats.
Packing & Shipping of Silicon Carbide Nanoparticles Nano β-SiC Powder:
We have many different kinds of packing, which depend on the silicon carbide nanoparticles quantity.
Silicon carbide nanoparticles packing: vacuum packing, 1kg/bag, 25kg/barrel, or as requested.
Silicon carbide nanoparticles shipping: could be shipped out by sea, by air, or by express as soon as possible once payment is received.
Silicon Carbide powder Properties |
|
| Other Names | Carborundum, alpha sintered SiC, Hexoloy, methanidylidynesilicon, moissanite, SiC powder |
| CAS No. | 409-21-2 |
| Compound Formula | SiC |
| Molecular Weight | 40.1 |
| Appearance | Green to Black or Gray Powder |
| Melting Point | 2730 °C |
| Boiling Point | N/A |
| Density | 3.0-3.2 g/cm3 |
| Solubility in H2O | N/A |
| Electrical Resistivity | 1 to 4 10x Ω-m |
| Specific Heat | 670 to 1180 J/kg-K |
| Tensile Strength | 210 to 370 MPa (Ultimate) |
| Thermal Conductivity | 120 to 170 W/m-K |
| Thermal Expansion | 4.0 to 4.5 µm/m-K |
| Young's Modulus | 370 to 490 Gpa |
Silicon Carbide Health & Safety Information |
|
| Signal Word | Warning |
| Hazard Statements | H315-H319-H335 |
| Hazard Codes | Xi |
| Risk Codes | 36/37/38 |
| Safety Statements | 26-36 |
| Transport Information | N/A |
