Graphite Heater for Vacuum Furnace High Temperature Heating
Product Overview
Graphite heaters are the core heating elements in high temperature vacuum furnaces. Made from high purity isostatic graphite materials, these heaters can operate at temperatures up to 3000C in vacuum or inert gas environments, far exceeding the capabilities of metallic heating elements.
Our graphite heaters are precision machined from premium grade graphite with excellent electrical conductivity, thermal stability, and mechanical strength. They provide uniform heating across the furnace chamber for consistent processing results in semiconductor, photovoltaic, and heat treatment applications.
Key Features
- Maximum operating temperature up to 3000C in vacuum environments
- Excellent electrical conductivity for energy-efficient heating
- Uniform temperature distribution across the furnace chamber
- High mechanical strength at elevated temperatures
- Low thermal expansion for dimensional stability
- Resistant to thermal shock and rapid temperature cycling
- Low outgassing properties ideal for high vacuum applications
- Custom geometries available per furnace design requirements
Technical Specifications
| Parameter | Value |
|---|---|
| Material | High Purity Isostatic Graphite |
| Carbon Purity | 99.99% |
| Density | 1.80 - 1.88 g/cm3 |
| Resistivity | 12 - 18 uOhm.m |
| Bending Strength | 40 - 55 MPa |
| Shore Hardness | 60 - 75 |
| Max Temperature | 3000C (vacuum) |
| Working Temperature | 1200C - 2600C |
| Shape Types | Rod, strip, plate, cylindrical, U-shape |
| Machining Tolerance | +/- 0.1mm |
| Surface Finish | Machined or sandblasted |
| Application Atmosphere | Vacuum, Ar, N2, H2 (forming gas) |
Applications
- Vacuum sintering furnaces for cemented carbide and ceramic materials
- Brazing and heat treatment furnaces for aerospace components
- Crystal growth furnaces for silicon and SiC crystals
- Semiconductor processing equipment and diffusion furnaces
- Photovoltaic cell manufacturing and diffusion processes
- Laboratory high temperature research furnaces
Why Choose Jincheng Graphite Heaters?
- 15 years of experience in graphite furnace component manufacturing
- Precision CNC machining for accurate dimensions and fit
- Multiple graphite grades available for different furnace requirements
- Custom design service based on your furnace chamber drawings
- Strict quality inspection and dimensional verification before delivery
- Competitive factory-direct pricing with no middleman markup
- Fast delivery: 7-15 days for standard sizes, 20-30 days for custom
- Technical support for heater design optimization and troubleshooting
FAQ
Q: How long do graphite heaters typically last?
A: Service life depends on operating temperature, atmosphere, thermal cycling frequency, and maintenance. Typical lifespan is 2-5 years under normal operating conditions.
Q: Can you manufacture heaters for my specific furnace model?
A: Yes, we custom manufacture graphite heaters based on your furnace chamber dimensions, power requirements, and mounting specifications. Please provide your furnace drawings or existing heater samples.
Q: What is the difference between graphite and metallic heating elements?
A: Graphite heaters can reach much higher temperatures (up to 3000C vs 1800C for MoSi2 elements), are lighter in weight, and offer better thermal shock resistance in vacuum and inert gas environments.
Q: Do you offer oxidation-resistant coating services?
A: Yes, we can apply SiC (silicon carbide) coating to graphite heaters for improved oxidation resistance in environments with partial oxygen content.
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