Products Description
High Pure Graphite Tube Used in Furnace is a high-purity graphite tube designed for electrical conduction, heating, or structural support in high-temperature furnace equipment. It is specifically designed for manufacturers of high-temperature industrial equipment such as vacuum furnaces, atmosphere furnaces, and sintering furnaces.
Products Advantages
Ultra-high purity: Utilizing ≥99.9% high-purity graphite raw materials, processed through high-temperature purification, effectively reducing ash and metallic impurity content.
High temperature resistance: The graphite itself can withstand temperatures up to 3000℃ (inert atmosphere), maintaining structural stability even at high temperatures.
Strong thermal stability: A low coefficient of thermal expansion combined with a uniform crystalline structure allows it to withstand rapid temperature fluctuations.
High machining precision: Employing CNC machining and precision grinding processes, the tolerances for both internal and external diameters are controllable.
Products Applications
Vacuum heat treatment industry: Heating tubes, support tubes, or protective tubes in vacuum sintering furnaces and vacuum annealing furnaces.
Semiconductor and electronic materials industry: High-temperature components in high-cleanliness environments such as single crystal furnaces, polycrystalline furnaces, and CVD furnaces.
Powder metallurgy industry: As heating components or structural supports in sintering furnaces, ensuring a stable thermal field.
New materials and laboratory equipment: High-temperature resistant structural components in high-temperature experimental furnaces and materials research equipment.
Photovoltaic and carbon materials industry: Heat-conducting and support components in graphitization furnaces and carbonization furnaces.
Graphite Tube material data sheet
| W-4 | W-5 | W-6 | W-7 | W-8 | WH-5 | WH-7 | WH-8 | ||
| bulk density | g/cm³ | 1.75 | 1.85 | 1.9 | 1.82 | 1.9 | 1.68 | 1.85 | 1.9 |
| Resistivity | uΩm | 8-11 | 8-10 | 8-9 | 11-13 | 11-13 | 13-15 | 11-13 | 11-13 |
| Thermal conductivity(100℃) | W/m.k | 110-120 | 130-140 | 130-140 | 110-120 | 110-120 | 80-100 | 100-120 | 110-120 |
| Thermal expansion coefficient (room temperature - 600℃) | 10-6/℃ | 5.46 | 4.75 | 4.8 | 5.8 | 5.85 | 5.8 | 5.9 | 5.85 |
| Shore Hardness | HSD | 42 | 48 | 53 | 65 | 70 | 60 | 68 | 72 |
| Flexural strength | Mpa | 38 | 46 | 55 | 51 | 60 | 38 | 62 | 70 |
| Compressive strength | Mpa | 65 | 85 | 95 | 115 | 135 | 80 | 135 | 160 |
| Elastic modulus | GPa | 9 | 11.8 | 12 | 12 | 13 | 8.8 | 12 | 13 |
| Porosity | % | 17 | 13 | 11 | 12 | 11 | 18 | 12 | 11 |
| Ash | PPM | 500 | 500 | 500 | 500 | 500 | 500 | 500 | 500 |
| Purification of ash | PPM | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 |
| grain size | um | 13-15 | 13-15 | 8-10 | 8-10 | 8-10 | 8-10 | 7 | 5 |
| Application | common use | common use | Continuous casting, sintering, high temperature metallurgy | EDM,Photovoltaic | EDM,Photovoltaic,GLASS | EDM | common use,EDM | EDM,Photovoltaic,GLASS |
Product Customization
Purity Grade (≥99.9% / Custom Grade)
Dimensions (Outer diameter, inner diameter, length can be customized according to drawings)
Density Range (affects strength and thermal conductivity)
Surface Finish (Rough machining / Fine machining / Mirror finish)
Environmental Compatibility (Vacuum / Inert gas / High-temperature oxidation environment)
Special Structures (Grooved, perforated, stepped structures, etc.)
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FAQ
Q: What is the purity of your high-purity graphite tubes?
A: Standard products have a purity of ≥99.9%. Higher purity grades can be provided upon request, suitable for semiconductor and high-vacuum environments.
Q: What is the highest temperature it can withstand?
A: It can withstand temperatures above 3000℃ for extended periods in inert or vacuum environments, exhibiting stable high-temperature performance.
Q: Is the product prone to cracking?
A: Through optimized grain structure and density control, the product possesses excellent thermal shock resistance and is not prone to cracking under normal operating conditions.
Q: Do you support customization based on drawings?
A: We support customization based on drawings or samples. Precision machining can be performed according to furnace structure.
Q: How is quality inspected?
A: Each batch of products undergoes density, dimensional, tolerance, and appearance inspections. Inspection records for key items are available.
Q: What is the typical delivery time?
A: Standard specifications: 7–15 days. Custom specifications depend on processing complexity.
Q: How are the products packaged and transported?
A: We use shockproof and moisture-proof industrial packaging, suitable for sea freight and long-distance transportation.
Q: Do you support long-term stable supply?
A: We support long-term cooperative supply and can prepare materials according to annual plans to ensure stable delivery.
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