What Is a Silicon Carbide Heat Sink?
ADCERAX® SiC Heat Sink is engineered for thermal management systems where high heat flux, corrosive media, and elevated operating temperatures converge. Its silicon-carbide structure maintains stable thermal conductivity across demanding industrial environments, allowing temperature distribution to remain consistent during continuous operation. This performance supports industries that require reliable heat dissipation and long-term structural stability in power-electronics assemblies, high-temperature equipment, and chemical processing lines.
Key Engineering Advantages of SiC Ceramic Heat Sinks
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Stable Heat Transfer Under High Thermal Load
Silicon carbide helps distribute concentrated heat across a wider ceramic surface, reducing localized thermal buildup in power modules, furnace fixtures and high-temperature process equipment. This is useful when the heat sink must maintain predictable thermal behavior during long operating cycles.
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Low Thermal Expansion for Better Dimensional Stability
SiC has low thermal expansion compared with many metal materials, which helps reduce distortion and contact-surface movement during repeated heating and cooling. This supports stable contact pressure and more consistent thermal transfer in assemblies exposed to thermal cycling.
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Resistance to Oxidation and Corrosive Atmospheres
For furnace, chemical and process equipment, heat-transfer components may contact oxidizing gases, acidic vapors or alkaline residues. Silicon carbide provides better chemical stability than many metallic heat blocks, helping reduce surface degradation and heat-transfer loss.
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Custom Geometry for Assembly Integration
ADCERAX can review SiC heat sink geometry according to mounting holes, grooves, channels, edge chamfers, contact surfaces, thickness control and installation interfaces. This allows the heat sink to match existing equipment layouts instead of forcing engineers to redesign the full assembly.
Technical Specifications for Industrial Evaluation
The SiC Heat Sink exhibits stable thermal behavior, mechanical robustness, and chemical resistance suitable for long-duration operation in high-temperature and corrosive industrial environments. These characteristics support its use in power-electronics assemblies, furnace structures, plasma systems, and chemical processing equipment where consistent thermal conduction and structural reliability are essential.
| Property | Specification | Why It Matters |
|---|---|---|
| Density | 3.05–3.15 g/cm³ | This indicates the compactness of the SiC ceramic material and helps evaluate structural stability for machined heat sink parts. |
| Thermal Conductivity | 120–150 W/m·K | This supports efficient heat spreading and helps reduce localized hot spots in high heat flux systems. |
| Maximum Operating Temperature | 1400–1500°C | This helps determine whether the heat sink can remain stable in furnace zones or other high-temperature equipment. |
| Thermal Expansion | 4.0–4.5 × 10⁻⁶/K | Low thermal expansion helps reduce thermal stress, warping and contact-surface movement during repeated heating and cooling. |
| Flexural Strength | 320–420 MPa | This shows the material’s resistance to bending stress during installation, clamping or repeated thermal loading. |
| Compressive Strength | ＞2000 MPa | This supports use in assemblies where the heat sink may be exposed to mounting pressure or mechanical loading. |
| Elastic Modulus | 390–420 GPa | High rigidity helps maintain dimensional stability under mechanical load and heat exposure. |
| Porosity | 12–15% | Porosity affects thermal behavior, oxidation resistance and suitability for different working atmospheres. |
| Hardness | Mohs 9–9.5 | High hardness provides strong wear resistance for contact surfaces exposed to particles, sliding or cleaning cycles. |
| Acid Resistance | Stable in HCl / H₂SO₄ | This helps the heat sink maintain surface stability in selected acidic process environments. |
| Alkali Resistance | Stable in NaOH media | This supports use in selected alkaline atmospheres or cleaning conditions after application review. |
| Oxidation Resistance | 1100–1200°C in air | This helps evaluate long-term performance when the heat sin |
Dimensions of SiC Heat Sink
| Silicon Carbide SiC Heat Sink | ||||
| Model No. | Length (mm) | Width (mm) | Thickness (mm) | Surface Profile |
| AT-SIC-P1047 | 10 | 10 | 1.5 | Flat Plate |
| AT-SIC-P1048 | 10 | 10 | 2 | Flat Plate |
| AT-SIC-P1049 | 10 | 10 | 3 | Flat Plate |
| AT-SIC-P1050 | 10 | 10 | 5 | Flat Plate |
| AT-SIC-P1051 | 10 | 12 | 2.5 | Flat Plate |
| AT-SIC-P1052 | 10 | 15 | 2 | Flat Plate |
| AT-SIC-P1053 | 11 | 13 | 5 | Corrugated |
| AT-SIC-P1054 | 15 | 15 | 2 | Flat Plate |
| AT-SIC-P1055 | 15 | 15 | 3 | Flat Plate |
| AT-SIC-P1056 | 15 | 15 | 4 | Flat Plate |
| AT-SIC-P1057 | 15 | 15 | 5 | Flat Plate |
| AT-SIC-P1058 | 20 | 20 | 10 | Flat Plate |
| AT-SIC-P1059 | 20 | 20 | 10 | Grooved |
| AT-SIC-P1060 | 20 | 20 | 2.5 | Flat Plate |
| AT-SIC-P1061 | 20 | 20 | 2 | Flat Plate |
| AT-SIC-P1062 | 20 | 20 | 5 | Flat Plate |
| AT-SIC-P1063 | 20 | 20 | 5 | Corrugated |
| AT-SIC-P1064 | 25 | 25 | 10 | Corrugated |
| AT-SIC-P1065 | 25 | 25 | 2.5 | Flat Plate |
| AT-SIC-P1066 | 25 | 25 | 3 | Flat Plate |
| AT-SIC-P1067 | 25 | 25 | 5 | Flat Plate |
| AT-SIC-P1068 | 25 | 25 | 5 | Corrugated |
| AT-SIC-P1069 | 25 | 25 | 8 | Corrugated |
| AT-SIC-P1070 | 30 | 30 | 10 | Corrugated |
| AT-SIC-P1071 | 30 | 30 | 2.5 | Flat Plate |
| AT-SIC-P1072 | 30 | 30 | 5 | Flat Plate |
| AT-SIC-P1073 | 30 | 30 | 5 | Corrugated |
| AT-SIC-P1074 | 30 | 30 | 8 | Corrugated |
| AT-SIC-P1075 | 35 | 35 | 10 | Corrugated |
| AT-SIC-P1076 | 40 | 40 | 3 | Flat Plate |
| AT-SIC-P1077 | 40 | 40 | 4 | Flat Plate |
| AT-SIC-P1078 | 40 | 40 | 5 | Flat Plate |
| AT-SIC-P1079 | 40 | 40 | 5 | Corrugated |
| AT-SIC-P1080 | 40 | 40 | 7 | Corrugated |
| AT-SIC-P1081 | 40 | 40 | 8 | Corrugated |
| AT-SIC-P1082 | 50 | 50 | 5 | Flat Plate |
| AT-SIC-P1083 | 50 | 50 | 5 | Perforated |
| AT-SIC-P1084 | 60 | 60 | 5 | Flat Plate |
| AT-SIC-P1085 | 60 | 60 | 8 | Flat Plate |
| Remarks: Adhesive / Non-Adhesive | ||||
SiC Heat Sink vs Metal, Alumina and AlN Heat Sink Materials
| Material Option | Typical Advantage | Limitation to Review | When to Consider SiC |
|---|---|---|---|
| Aluminum or Copper | High thermal conductivity and easy machining. | These materials may oxidize, deform or corrode in high-temperature or reactive environments. | Consider SiC when metal heat sinks lose shape, corrode or cannot survive furnace and process conditions. |
| Alumina Ceramic | Electrical insulation and cost-effective ceramic stability. | Alumina has lower thermal conductivity than SiC and AlN. | Consider SiC when higher heat-spreading performance is required in a harsh environment. |
| Aluminum Nitride | High thermal conductivity and electrical insulation. | AlN may require careful review for moisture exposure, cost and mechanical design. | Consider SiC when high-temperature strength and corrosion resistance are more important than maximum thermal conductivity. |
| Silicon Carbide | Balanced thermal conductivity, high-temperature stability and corrosion resistance. | SiC machining complexity and ceramic brittleness require proper design review. | Choose SiC when the heat sink must work in thermal cycling, furnace, chemical or other harsh industrial systems. |
Packaging of SiC Heat Sink
The SiC Heat Sink is packed through a multi-layer process that protects each component during international transportation. Individual units are first secured in reinforced inner cartons, which are then sealed and consolidated into a heavier outer box to prevent movement. The boxed goods are finally fixed inside a strapped wooden crate to ensure stability against vibration, stacking load, and long-distance freight conditions.
