Product Overview
Precision-machined graphite seed holders and seed chucks are critical components in single crystal growth furnaces, securely holding the seed crystal during Czochralski pulling and Kyropoulos growth processes. Our graphite seed holders are manufactured from high-purity isostatic graphite with precise dimensional accuracy to ensure perfect alignment and reliable seed gripping throughout the crystal growth cycle.
Key Features
- High purity isostatic graphite for minimal contamination
- Precision machined to tight tolerances for perfect seed alignment
- Excellent high temperature stability up to 2000°C+
- Custom designs for different crystal growth furnace models
- Compatible with silicon, sapphire, and other crystal growth processes
- Good mechanical strength and wear resistance
- Low outgassing for clean vacuum environment
Technical Specifications
| Parameter | Unit | Value |
|---|---|---|
| Material | - | High Purity Isostatic Graphite |
| Bulk Density | g/cm³ | 1.80 - 1.88 |
| Shore Hardness | - | 70 - 80 |
| Flexural Strength | MPa | 45 - 55 |
| Dimensional Tolerance | mm | ±0.05 |
| Surface Finish | Ra μm | ≤1.6 |
| Ash Content | ppm | <50 |
| Max Working Temp | °C | 2200 |
Applications
- Czochralski (CZ) silicon single crystal growth
- Sapphire crystal growth (Kyropoulos method)
- Germanium and semiconductor crystal growth
- Compound semiconductor crystal growth
- Optical crystal growth processes
- Laboratory crystal growth research equipment
Why Choose Jincheng Graphite Seed Holders?
We manufacture precision graphite seed holders and chucks for crystal growth furnace manufacturers and crystal growers worldwide. Our components are machined to exacting standards with tight tolerances critical for successful crystal pulling. We offer custom designs for various furnace models and crystal types, backed by our technical expertise in graphite materials and crystal growth applications.
FAQ
Q: Can you manufacture seed holders for specific furnace models?
A: Yes, we specialize in custom graphite components. Please provide your drawings or specifications, including seed diameter, overall dimensions, and mounting interface. We can produce seed holders matched to your exact furnace model and crystal growth process.
Q: What is the typical service life of a graphite seed holder?
A: Under normal operating conditions, graphite seed holders can last for many crystal growth runs. Service life depends on operating temperature, atmosphere, and mechanical handling. Regular inspection of gripping surfaces is recommended to ensure reliable seed holding.
Q: Do you offer CVD SiC coating for seed holders?
A: Yes, we can provide CVD silicon carbide coating on graphite seed holders and other crystal growth components. SiC coating improves surface hardness, reduces particle generation, and extends component service life in critical crystal growth applications.
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