Alumina Ceramic Heat Sink Plate 310×310mm Al₂O₃ Thermal Management Substrate
Alumina Ceramic Heat Sink Plate 310×310mm Al₂O₃ Thermal Management Substrate
The 310 × 310 mm Alumina Ceramic Heat Sink Plate is a large-format thermal management substrate manufactured from high-purity Al₂O₃ ceramic material. Designed for high-power and high-reliability environments, it combines efficient heat dissipation, excellent electrical insulation, and long-term thermal stability in a single engineered component.
Compared with conventional metal heat sinks, alumina ceramic provides superior dielectric performance, excellent corrosion resistance, and stable operation under high-voltage and high-temperature conditions.
This ceramic thermal plate is widely used in power electronics, semiconductor equipment, LED modules, RF systems, and industrial heat dissipation applications where both heat transfer and insulation are critical.
Technical Specifications
| Item | Specification |
|---|---|
| Material | Alumina Ceramic (Al₂O₃) |
| Size | 310 × 310 mm |
| Thickness | 0.5 – 10 mm (customized) |
| Density | 3.6 – 3.9 g/cm³ |
| Thermal Conductivity | 20–30 W/m·K |
| Dielectric Strength | ≥10–15 kV/mm |
| Volume Resistivity | ≥10¹⁴ Ω·cm |
| Flexural Strength | ≥300–350 MPa |
| Hardness | ≥80 HRA |
| Surface Roughness | Ra ≤0.4–0.8 μm |
| Flatness | ≤0.05–0.10 mm |
| Color | Ivory / White |
Typical Applications
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Power Electronics
Power Electronics- IGBT cooling systems
- MOSFET thermal management
- Power module substrates
Semiconductor Equipment
- Wafer handling fixtures
- Semiconductor support platforms
- Vacuum and process system components
LED Thermal Management
- High-power LED heat dissipation substrates
- Lighting thermal control modules
RF & High Voltage Systems
- Microwave equipment
- High-voltage insulation assemblies
Precision Industrial Equipment
- Electronic packaging structures
- Precision heat dissipation platforms
Why Choose Alumina Ceramic Heat Sink Plates?![]()
- Excellent thermal management capability
- High dielectric strength and electrical insulation
- Superior wear resistance and mechanical stability
- Stable performance under high temperatures
- Chemical and corrosion resistant
- Low thermal expansion for dimensional stability
- Precision-ground surfaces for high-flatness applications
- Suitable for semiconductor and high-voltage systems
Available Material Grades
We provide multiple alumina purity options according to application requirements:
| Material Grade | Features | Typical Application |
|---|---|---|
| 95% Al₂O₃ | Cost-effective industrial grade | General thermal management |
| 96% Al₂O₃ | Enhanced mechanical properties | Electronic insulation systems |
| 99% Al₂O₃ | High purity and improved stability | Semiconductor & precision equipment |
Precision Customization Services
Custom machining services are available according to drawings or specifications:
- Custom dimensions and thickness
- CNC machining
- Laser cutting
- Precision drilling
- Slot processing
- Surface polishing and lapping
- Metallization support:
- Ag coating
- Au coating
- Ni plating
- Semiconductor-grade flatness processing
OEM and custom fabrication services are supported.
Quality Inspection & Packaging
Each ceramic heat sink plate undergoes strict inspection before shipment:
100% dimensional inspection
Flatness verification
Surface crack inspection
Defect and edge quality check
Packaging:
Shock-proof protective foam + export-grade carton packaging to ensure safe international transportation.
Frequently Asked Questions
Q1: Is alumina ceramic better than aluminum heat sinks?
Aluminum has higher thermal conductivity, but alumina ceramic offers much better electrical insulation, corrosion resistance, and high-temperature stability. It is ideal for applications where conductive metal heat sinks cannot meet safety or reliability requirements.
Q2: Can this ceramic plate be customized with holes or complex structures?
Yes. We support CNC machining, laser cutting, drilling, grooves, and custom geometries based on customer drawings.
Q3: Can alumina ceramic withstand high-temperature operation?
Yes. High-purity alumina ceramics maintain excellent structural stability under elevated temperatures and harsh environments. Proper installation design can ensure long-term service reliability.
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.