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

ElementsConcentration (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

PropertyRange
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 phaseAlpha

Applications

Applications - protective windows
Protective Windows

Durable scratch-proof windows for watches, store scanners cell phones, and industrial equipment

Applications - Industrial Processing equipment
Semiconductor Equipment and Industrial Processing

Plasma tubes, thermocouple sheaths, dispersion plates, focus rings, etc.

Applications - Medical And Analytical Devices
Medical and Analytical Devices

High performance components for medical, dental and lab analysis, etc.

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