Graphite Insulation Shield for Vacuum Furnace
Product Overview
Jincheng graphite insulation shields are high-purity graphite felt and rigid graphite insulation panels designed for thermal insulation in vacuum furnaces and high-temperature processing equipment. These insulation components minimize heat loss, improve temperature uniformity, and protect furnace walls from extreme temperatures.
Our graphite insulation products include soft graphite felt, rigid graphite board, and laminated graphite insulation structures, all manufactured from high-purity carbon fiber and graphite materials. Custom shapes and sizes are available to fit any furnace chamber design.
Key Features
- Excellent thermal insulation with low thermal conductivity for energy efficiency
- High temperature resistance up to 3000°C in vacuum or inert atmosphere
- Low heat capacity for rapid heating and cooling cycles
- High purity with low ash content for contamination-free processing
- Good chemical stability resistant to most acids, alkalis, and corrosive gases
- Lightweight compared to ceramic insulation materials
- Easy to machine into custom shapes and sizes
- Long service life with low sublimation rate at high temperatures
Technical Specifications
| Parameter | Value |
|---|---|
| Material | High purity graphite felt / rigid graphite board |
| Density | 0.10 - 0.30 g/cm3 (felt), 0.8 - 1.2 g/cm3 (board) |
| Carbon Content | > 99.9% |
| Ash Content | < 500 ppm |
| Thermal Conductivity | 0.15 - 0.30 W/(m*K) at room temp |
| Max Working Temperature | 3000°C (vacuum/inert) |
| Available Forms | Soft felt, rigid board, laminated panel |
| Thickness Range | 1 mm - 50 mm |
| Sheet Size | Up to 1000 x 2000 mm |
| Compressive Strength (board) | 10 - 20 MPa |
Applications
- Vacuum sintering furnaces for thermal insulation lining
- Single crystal growth furnaces for heat zone insulation
- Graphite purification furnaces for high-temperature chamber insulation
- Diamond synthesis presses for HPHT tooling insulation
- Heat treatment furnaces for reducing energy consumption
- Industrial heating furnaces for temperature uniformity improvement
Why Choose Jincheng Graphite Insulation?
- Complete insulation solutions - felt, board, and custom fabricated parts
- High purity materials suitable for semiconductor and photovoltaic applications
- Custom fabrication service - cut and shaped to your furnace drawings
- Optimized insulation design to minimize energy loss and improve temperature uniformity
- Material pairing available - insulation matched to your heating elements
- Fast turnaround - standard sheets in stock, custom parts within 1-2 weeks
- Factory direct pricing with competitive bulk discounts
- Global delivery with export packaging for safe shipping
Frequently Asked Questions
Q1: What is the difference between graphite felt and rigid graphite board?
A: Graphite felt is soft and flexible, ideal for wrapping and irregular shapes. Rigid graphite board is stiffer and has higher compressive strength, used for flat wall linings and structural insulation panels.
Q2: How thick should insulation be for a 2000°C furnace?
A: Typically 50-100mm total thickness is recommended, depending on furnace size and required energy efficiency. We can help calculate optimal insulation thickness for your specific furnace.
Q3: Can you fabricate custom-shaped insulation parts?
A: Yes, we can cut and shape graphite felt and board into custom geometries including cylinders, domes, and complex chamber linings based on your drawings.
Q4: What is the typical lifespan of graphite insulation?
A: Under normal vacuum furnace operation at 1800-2200°C, graphite insulation typically lasts 3-5 years before needing replacement.
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