Primary Application: Water-Cooled Crucible Liner
This high-purity alumina component is designed for use as a liner in water-cooled copper crucible systems, particularly in molten aluminum processing. It functions as an effective thermal barrier between the molten metal and the crucible body, helping to reduce heat loss while protecting the system from aluminum penetration and chemical attack.
By incorporating this liner, the overall process becomes more stable and energy-efficient, while significantly extending the service life of the crucible.
Key Advantages
The material offers excellent thermal insulation performance and strong resistance to corrosion caused by molten aluminum, making it well-suited for demanding high-temperature environments.
Product Specifications
- Material: 99% Alumina
- Dimensions: 296 × 126 × 58 mm
- Tolerances:
Wall thickness: ±8 mm
Width & height: ±2 mm
Length: ±4 mm - Customization: Available
- Mold Requirement: Not required
- Minimum Order Quantity: No minimum (orders can start from 1 unit)
Performance Data
99 Alumina Ceramic Material Properties:
| Properties | Unit | Value |
| Main Composition | % | 99 |
| Density | g/cm³ | ≥3.88 |
| Hardness | HRA | 88.00 |
| Flexural Strength | MPa | ≥350 |
| Compressive Strength | MPa | ≥2,500.00 |
| Young Modulus | GPa | 350.00 |
| Max Using Temperature | °C | 1,500.00 |
| Thermal Expansion Coefficient (20-1000°C) | 10-6/°C | 8.20 |
| Thermal Conductivity (20°C) | W/(m.k) | 25.00 |
| Electrical Resistivity (20°C) | Ω·cm | ≥ 1014 |
| Dielectric Strength | KV/mm, DC | 20.00 |
| Dielectric Constant (20°C,1MHz) | εr | 9.40 |
| Dielectric Loss (1MHz) | tanδ × 10-4 | 2.00 |
Thermal Characteristics:
Maximum operating temperature: up to 1730°C
Recommended heating rate: not exceeding 5°C per minute
Maximum temperature increase: within 300°C per hour
These parameters ensure reliable performance under controlled heating conditions and help prevent thermal stress during operation.
