Some of these growth methods include:
- EFG net shape growth utilize continuous feeding systems
- HDSM – Horizontal direction solidification systems can utilize both continuous feed and bulk growth methods
- Bulk sapphire growth methods include Kyropoulos (KY), Heat Exchange (HEM) and Czochralski (CZ) HEM among several others
The Polar Advantage
Higher Density Beads
Our denser beads improve sapphire throughput and yields to help lower customer’s cost of sapphire production
Consistent and Higher Purity
Reduced contaminants and strict process control delivers HPA with higher and consistent purity helping improve sapphire crystal quality and growth process repeatability
Controlled BET
Lower and consistent surface area improves flowability and reduces micro-bubbles to improve sapphire growth yields.
Alumina Beads Data Sheet
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5N Chemical Properties
| Elements | Concentration (ppmw) |
|---|---|
| Na | <3 |
| Mg | <1.0 |
| Si | <1 |
| Ca | <2 |
| Ti | <0.5 |
| Ga | <0.1 |
| Fe | <1 |
| Zn | <0.5 |
| K | <1 |
| Others | <0.5 |
Physical Properties
| Property | Range |
|---|---|
| Loose Density (g/cm³) | 2.0 |
| Pycnometric density (g/cm³) | 3.4-3.7 |
| size (mm) | 2-4 |
| Specific surface area (m2/gr) | 0.005-0.07 |
| Chemical phase | Alpha |
Applications
Protective Windows
Durable scratch-proof windows for watches, store scanners cell phones, and industrial equipment
Semiconductor Equipment and Industrial Processing
Plasma tubes, thermocouple sheaths, dispersion plates, focus rings, etc.
Medical and Analytical Devices
High performance components for medical, dental and lab analysis, etc.
