Alumina Products for Sapphire Growth

Grade A5NαB3 A5NαB4.5 A5NαSmall A5NƴBig A5Nƴ
Appearance White Powder White Powder White Powder White Powder White Powder
Purity (%) 99.999 99.999 99.999 99.999 99.999
Crystal From α α α ϒ ϒ
BET (m²⁄g) 3.0-3.5 4.2-4.6 3.0-3.5 105-115 105-115
Average Particle Size
D50 (µm)
5.0-6.0 5.0-6.0 2.8-3.2 15-25 5-6
PSD
Bulk Density (g⁄cm³) 0.28-0.32 0.28-0.32 0.28-0.32 0.38-0.42 0.28-0.32
Tap Density (g⁄cm³) 0.56-0.60 0.56-0.60 0.62-0.68 0.58-0.62 0.56-0.60
Impurities(≤ %) Si 8 8 8 5 5
Fe 2.0 2.0 2.0 1.5 1.5
Na 1.0 1.0 1.0 1.0 1.0
K 1.0 1.0 1.0 1.0 1.0
Ca 1.0 1.0 1.0 1.0 1.0
Mg 1.0 1.0 1.0 1.0 1.0
Cu 1.5 1.5 1.5 1.5 1.5
La 0.1 0.1 0.1 0.1 0.1
Ce 0.1 0.1 0.1 0.1 0.1


Grade ADisc ACrackle ABall ABrick Polycrystalline Crackle
Bild
Appearance White Disc Translucent Crackle White Ball White Brick Translucent Crackle
Purity (%) 99.999 99.999 99.999 99.999 99.999
Crystal Form α α α α -
Density (g⁄cm³) ≥3.7 ≥2.0 ≥2.0 ≥3.7
Size (mm) Φ50, Φ60, Φ80, Φ180, Φ210 50x50x20
Particle Size (mm) 8-120 1.8-2.2 nach Anforderung
Bulk Density (g⁄cm³) - - - - 3,00
Impurities(≤ ppm) Si 8 8 8 8 8
Fe 2.0 2 2 2 2.0
Na 1.0 1.0 1.0 1.0 1.0
K 1.0 1.0 1.0 1.0 1.0
Ca 1.0 1.0 1.0 1.0 1.0
Mg 1.0 1.0 1.0 1.0 1.0
Cu 1.5 1.5 1.5 1.5 1.5
La 0.1 0.1 0.1 0.1 0.1
Ce 0.1 0.1 0.1 0.1 0.1
Ni - - - - 0.3