These unpolished single crystal sapphire rods are made from 99.999% high-purity Al₂O₃, offering excellent mechanical strength, thermal stability, and chemical resistance. Produced using Kyropoulos (KY) or Pulling-Down (PD) methods, these rods maintain high dimensional precision and structural integrity even under extreme conditions.
The fine-ground (as-grown) surface ensures minimal processing while providing strong support for semiconductor wafers, optical components, laser systems, and high-temperature experiments. Their broad UV–IR transparency, high hardness, and resistance to wear and corrosion make them ideal for advanced research, industrial, and electronic applications.
Available in custom diameters, lengths, and crystal orientations to meet specialized engineering and scientific needs.
High-purity monocrystalline Al₂O₃ (99.999%)
Mohs hardness 9 — extremely wear-resistant
Thermal stability up to 2000°C
Fine-ground / unpolished surface for cost-effective applications
Chemical and plasma resistant
Broad optical transmission (0.17–5.5 μm, UV–IR)
Dimensional precision for industrial and optical components
| Item | Specification |
|---|---|
| Material | 99.999% High-Purity Monocrystalline Al₂O₃ |
| Crystal Orientation | C-plane (0001), A-plane (11-20), M-plane (10-10), R-plane (1-102), N-plane (11-23), V-plane (22-43) |
| Halkaisija | 0.3 mm – 8 inch (custom) |
| Length | Up to 600 mm |
| Density | 3.97–4.1 g/cm³ |
| Melting Point | 2000–2050°C |
| Surface Finish | Fine-ground (unpolished / as-grown) |
| Coefficient of Thermal Expansion | 5.0–8.4 × 10⁻⁶ /K |
| Optical Transmission Range | 0.17–5.5 μm |
| Refractive Index (0.532 μm) | n₀ = 1.7717, nₑ = 1.76355 |
| Kiderakenne | Hexagonal (Rhombohedral) |
| Hardness | Mohs 9 |
| Young’s Modulus | 345 GPa |
| Shear Modulus | 145 GPa |
| Bulk Modulus | 240 GPa |
| Water Absorption | Nil |
| Packaging | Single-piece protective packaging |
Wafer support rods and guides
High-temperature furnace rods
LED / MOCVD substrate support
Plasma chamber components
Laser support rods
UV–IR optical windows and rods
Optical alignment components
Wear-resistant plungers and rods
Bearings and precision mechanical components
High-load insulating rods
High-temperature experimental supports
Vacuum chamber guides
Endoscope and medical instrument components
Diameter: 0.3 mm – 8”
Length: 5 mm – 600 mm
Crystal orientation: C/A/M/R/N/V
End shapes: flat, rounded, tapered, saddle pin
Surface: fine-ground / as-grown
OEM and technical support for research or industrial integration
1. Are unpolished sapphire rods suitable for high-precision applications?
Yes. While unpolished, the fine-ground surface ensures dimensional accuracy and structural stability for wafers, optics, and high-temperature experiments.
2. Can these rods withstand high temperatures?
Absolutely. Sapphire rods resist temperatures up to 2000°C, maintaining mechanical integrity and low thermal expansion.
3. Can the rods be customized?
Yes. We offer a wide range of diameters, lengths, crystal orientations, and special end shapes to meet industrial, optical, and research requirements.
