Al2O3 Ocean Blue Sapphire Stones with 9 Mohs Hardness and 2040°C Melting Point for Industrial Applications
Price:
10USD-50USD
MOQ:
100pcs
Delivery Time:
According to quantity
Product Description
Al2O3 Ocean Blue Sapphire Emerald Stones
Product Overview
Sapphire stones composed of aluminum oxide (Al2O3) with exceptional abrasion resistance and hardness. These synthetic sapphire stones feature a distinctive ocean blue coloration and are manufactured using high-temperature processes for superior mechanical and optical properties.
Material Composition & Properties
Sapphire belongs to the corundum mineral group in the trigonal crystal system. The main component is alumina (Al2O3) with trace elements of iron and titanium that produce the characteristic blue coloration. Synthetic sapphire is manufactured from pure alumina at high temperatures, resulting in exceptional hardness and transparency.
Technical Specifications
| Category | Property | Value |
|---|---|---|
| General | Chemical Formula | Al2O3 |
| Crystal System | Hexagonal | |
| Thermal | Melting Temperature | 2040°C |
| Thermal Expansion | Parallel to C-axis: 6.7×10⁻⁶ Perpendicular to C-axis: 5.0×10⁻⁶ |
|
| Specific Heat | 0.18 Cal/g·°K (25°C) | |
| Mechanical | Density | 3.98-4.1 g/cm³ |
| Hardness | 9 Moh's Scale (Hv) ≥1700 kg/mm² |
|
| Modulus of Elasticity | 340-380 GPa | |
| Compressive Strength | 2.1 GPa | |
| Optical | Index of Refraction | Parallel to C-axis: 1.769 Perpendicular to C-axis: 1.769 |
| IR Transmission | 85% | |
| Electrical | Electrical Resistance | >10¹⁶ Ω/cm (25°C) |
| Dielectric Constant | 7.5-10 | |
| Chemical | Erosion Resistance | Resistant to acids and alkalis at normal temperature, only corroded by HF at 300°C |
Key Performance Features
• Hardness rating of 9 on Moh's scale (second only to diamond)
• High optical transmittance range: 0.14-6.0 μm
• Excellent thermal conductivity and thermal shock resistance
• Superior mechanical strength with compressive strength of 2.1 GPa
• Chemical stability resistant to corrosion from rain, sand, and salt spray
• High surface smoothness and electrical resistivity
Manufacturing Capabilities
• Direct manufacturer of color sapphire boule with proprietary growth equipment
• Advanced sapphire processing expertise, particularly for watch cases
• Custom production capabilities using both CZ and KY growth methods
• Precision processing and polishing with experienced technical team
• Professional OEM services with CAD and 3D drawing support
Customization & Ordering
We specialize in custom production according to client specifications. CAD or 3D drawings are required for custom orders. Sample availability with charge refund on orders exceeding 100 pieces. Standard delivery time of 5-8 weeks for 200 pieces of watch cases, depending on processing complexity.
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
ARH Sapphire Co., Ltd
Location
Room 2-11，No.50 Yunhan Road，Chongqing China
Contact Person
Florence Chen