Product Overview
Graphite support rods are high-performance structural components made from high-purity or isostatic graphite, designed for high-temperature, vacuum, and corrosive environments. With excellent thermal resistance, low thermal expansion, and chemical stability, they are widely used in semiconductor, photovoltaic, vacuum heat treatment, and chemical processing equipment to provide stable support and precise positioning in high-temperature applications.
Key Features
✅ Ultra-High Temperature Resistance
Long-term use up to 2200°C in inert atmospheres, with peak tolerance of 3000°C
✅ High Strength
Compressive strength ≥80MPa (isostatic graphite), flexural strength ≥45MPa
✅ Thermal Stability
Thermal expansion coefficient ≤5×10⁻⁶/℃, minimal deformation at high temperatures
✅ Corrosion Resistance
Resists acids, alkalis, molten salts, and organic solvents, ideal for harsh environments
✅ Lightweight
Density 1.7-1.85g/cm³, over 60% lighter than metal supports
Technical Specifications
|
Parameter |
Standard Type |
Enhanced Type |
High-Purity Type |
|
Material |
Isostatic Graphite |
Carbon Fiber Reinforced Graphite |
High-Purity Graphite (≥99.99%) |
|
Max Operating Temp |
2200°C (Inert) |
2400°C (Inert) |
2800°C (Inert) |
|
Compressive Strength |
80MPa |
120MPa |
60MPa |
|
Thermal Conductivity |
90-120W/m·K |
70-100W/m·K |
100-140W/m·K |
|
Surface Treatment |
Uncoated/SiC Coated |
Multi-Layer Coating |
High-Gloss Polish |
|
Compatible Environments |
Vacuum/Inert Gas |
Oxidative Atmospheres |
Ultra-High-Purity Processes |
Typical Applications
1,Semiconductor Industry
Hot zone supports for monocrystalline silicon growth furnaces, epitaxial equipment load-bearing columns
2,Photovoltaic Manufacturing
Guide rods for polysilicon ingot furnaces, supports for wafer sintering furnaces
3,Vacuum Heat Treatment
Load-bearing beams for high-temperature sintering furnaces, alignment pins for brazing furnaces
4,Chemical Equipment
Electrode supports for molten salt electrolyzers, reactor linings for corrosive media
Product Series
1,Standard Support Rods
Diameter: Φ10-Φ200mm, Length: ≤2000mm
2,Custom-Shaped Supports
Machinable with threads, grooves, tapers, and other complex features
3,Composite Support Rods
Graphite-metal hybrid designs (e.g., molybdenum-cored graphite rods)
Quality Control
✔ Material Inspection: X-ray fluorescence (XRF) analysis for impurities (ash content ≤100ppm)
✔ Precision Machining: CNC processing with diameter tolerance ±0.05mm, straightness ≤0.1mm/m
✔ Performance Testing:
High-temperature load testing (24 hours at 2200°C without deformation)
Thermal shock cycling (2000°C ↔ room temperature, 20 cycles without cracking)
Customization Services
Dimensional Customization: Non-standard diameters/lengths
Surface Treatments: Anti-oxidation coatings (SiC/Al₂O₃), metallization
Functional Integration: Built-in thermocouple holes, cooling channels, conductive interfaces
Usage Guidelines
⚠ Installation: Avoid direct contact with metal; use graphite or ceramic fixtures
⚠ Oxidative Environments: Regular coating inspections (recommended every 500 hours)
⚠ Maintenance: Clean with ethanol or ultrasonic methods; avoid mechanical abrasion
Selection Support: Provide operating conditions (temperature/load/media) for optimal model recommendations
(Complementary products: Graphite crucibles, graphite heaters, graphite connectors)