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Product Name: 99% - 99.8% High Purity Alumina Crucibles
Product Description (SEO-Optimized):
The High Purity Alumina Crucibles (99% to 99.8% Al₂O₃) are precision-engineered ceramic containers designed for extreme-temperature processes requiring minimal contamination, exceptional thermal stability, and resistance to aggressive chemical environments. These crucibles are ideal for applications in advanced research, semiconductor manufacturing, metallurgy, and high-purity material synthesis.
Key Features:
- Purity Range:
- 99% Alumina: Cost-effective solution for general high-temperature applications (e.g., glass melting, alloy testing).
- 99.8% Alumina: Ultra-low impurity (<200 ppm) for critical processes like semiconductor crystal growth and high-purity metal refining.
- Extreme Temperature Performance:
- Withstand temperatures up to 1,750°C (99%) and 1,800°C (99.8%) in oxidizing, reducing, or inert atmospheres.
- Superior Chemical Resistance:
- Immune to acids (HF, HNO₃), alkalis (KOH), and molten metals (e.g., platinum, gold).
- Thermal Shock Resistance:
- Low thermal expansion (7.1–7.4 ppm/°C) ensures durability during rapid heating/cooling cycles.
- Customizable Designs:
- Available in cylindrical, conical, or boat-shaped geometries (5ml to 10L capacities).
Applications:
- Laboratory & Research:
- Sample preparation for XRF, ICP-MS, and atomic absorption spectroscopy.
- Sintering of advanced ceramics (ZrO₂, SiC) and superconductors.
- Semiconductor Industry:
- Crystal growth (sapphire, GaN, SiC) for LED and power electronics.
- High-purity silicon refining for photovoltaic and IC production.
- Industrial Metallurgy:
- Melting of precious metals, alloys, and glass in vacuum or inert gas furnaces.
- Heat treatment of aerospace components and nuclear materials.
- Advanced Manufacturing:
- Sintering of technical ceramics and refractory materials.
Technical Specifications:
| Parameter | 99% Alumina | 99.8% Alumina |
|---|---|---|
| Purity | ≥99% Al₂O₃ | ≥99.8% Al₂O₃ |
| Max Temperature | 1,750°C (air) | 1,800°C (air) |
| Density | 3.85–3.90 g/cm³ | 3.92–3.96 g/cm³ |
| Thermal Conductivity | 28 W/m·K | 30 W/m·K |
| Surface Finish | As-fired or machined | Mirror-polished (Ra ≤0.2μm) |
| Compliance | ISO 9001, RoHS, REACH | ASTM E11, SEMI F72 |
Competitive Advantages:
- Cost Efficiency: 99% crucibles offer budget-friendly performance for non-critical applications.
- Premium Performance: 99.8% crucibles ensure ultra-low contamination for high-value processes (e.g., single-crystal growth).
- Durability: 3x longer lifespan than quartz or graphite crucibles in cyclic thermal environments.
- Global Compliance: Certified for use in ISO Class 5 cleanrooms and high-vacuum systems.
SEO Keywords:
High purity alumina crucibles, 99.8% alumina crucible, laboratory-grade crucibles, semiconductor processing crucibles, high-temperature ceramic crucibles, contamination-resistant crucibles.
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