Product Overview
Our high-purity graphite heating elements are specifically designed for single crystal growth furnaces, including Czochralski (CZ) silicon crystal growth and sapphire crystal growth. Made from isostatic pressed graphite with high density and low ash content, these heating elements deliver exceptional thermal performance, uniform temperature distribution, and long service life in the demanding environment of crystal growth processes.
Key Features
- High purity isostatic graphite material with ash content below 50ppm
- Excellent thermal conductivity and uniform heating performance
- High temperature resistance up to 3000°C in inert atmosphere
- Superior thermal shock resistance and mechanical strength
- Precision machined to tight tolerances for optimal furnace performance
- Low gas emission and low outgassing for clean crystal growth environment
- Custom designs available for different furnace models and chamber sizes
Technical Specifications
| Parameter | Unit | Standard Grade | High Purity Grade |
|---|---|---|---|
| Bulk Density | g/cm³ | 1.78 | 1.85 |
| Shore Hardness | - | 65 | 75 |
| Flexural Strength | MPa | 38 | 45 |
| Compressive Strength | MPa | 70 | 85 |
| Electrical Resistivity | μΩ·m | 12 | 10 |
| Thermal Conductivity | W/(m·K) | 110 | 130 |
| Ash Content | ppm | <200 | <50 |
| Max Working Temperature | °C | 2800 | 3000 |
Applications
- Single crystal silicon growth (Czochralski process)
- Sapphire crystal growth furnaces
- Germanium and other semiconductor crystal growth
- Vacuum and atmosphere sintering furnaces
- Graphite hot zone assemblies for semiconductor manufacturing
- Optical crystal growth and processing equipment
Why Choose Jincheng Graphite Heating Elements?
With over 20 years of experience in graphite material processing, Huixian Jincheng Abrasive Mold Factory provides high-quality graphite heating elements for crystal growth applications worldwide. Our in-house manufacturing capability ensures strict quality control from raw material selection to final precision machining. We offer custom design services to match your specific furnace requirements, and our technical team provides expert support for material selection and application engineering.
FAQ
Q: What is the typical service life of your graphite heating elements?
A: Under normal operating conditions in silicon crystal growth furnaces, our high-purity graphite heating elements typically last 6-12 months depending on operating temperature, atmosphere, and furnace design.
Q: Can you provide custom sizes and geometries?
A: Yes, we specialize in custom graphite components. Please provide your drawings or specifications, and our engineering team will design and manufacture heating elements tailored to your furnace model and process requirements.
Q: What material grades do you recommend for crystal growth applications?
A: For critical crystal growth applications requiring the lowest contamination, we recommend our high-purity grade graphite with ash content below 50ppm. For less demanding applications, our standard grade provides excellent performance at a more competitive price point.
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