4N Alumina - Properties and Parameters

Grade A4NαB3 A4NαB4.5 A4NαSmall A4NαBig A4Nƴ A4NƴBig
Appearance White Powder White Powder White Powder White Powder White Powder White Powder
Purity (%) 99.99 99.99 99.99 99.99 99.99 99.99
Crystal From α α α α ϒ ϒ
BET (m²⁄g) 3.0-3.5 4.2-4.6 3.0-3.5 3.0-3.5 105-115 105-115
Average Particle Size
D50 (µm)
5.0-6.0 5.0-6.0 1.8-2.4 15-25 5-6 15-25
PSD
Bulk Density (g⁄cm³) 0.28-0.32 0.28-0.32 0.28-0.32 0.35 0.28-0.32 0.38-0.42
Tap Density (g⁄cm³) 0.56-0.60 0.56-0.60 0.62-0.68 0.8-0.85 0.56-0.60 0.58-0.62
Impurities(≤ ppm) Si 12 12 12 12 10 10
Fe 2.5 2.5 2.5 2.5 2.0 2.0
Na 2.0 2.0 2.0 2.0 2.0 2.0
K 1.0 1.0 1.0 1.0 1.0 1.0
Ca 2.0 2.0 2.0 2.0 2.0 2.0
Mg 1.0 1.0 1.0 1.0 1.0 1.0
Cu 2.0 2.0 2.0 2.0 2.0 2.0
La 1.0 1.0 1.0 1.0 1.0 1.0
Ce 1.0 1.0 1.0 1.0 1.0 1.0




5N Alumina

Grade A5NαB3 A5NαB4.5 A5NαSmall A5NαBig A5Nƴ A5NƴBig Al(OH)3*
Appearance White Powder White Powder White Powder White Powder White Powder White Powder White Powder
Purity (%) 99.999 99.999 99.999 99.999 99.999 99.999 99.999
Crystal From α α α α ϒ ϒ -
BET (m²⁄g) 3.0-3.5 4.2-4.6 3.0-3.5 3.0-3.5 105-115 105-115 40-60
Average Particle Size
D50 (µm)
5.0-6.0 5.0-6.0 2.8-3.2 15-25 5-6 15-25 15-25
PSD -
Bulk Density (g⁄cm³) 0.28-0.32 0.28-0.32 0.28-0.32 0.35 0.28-0.32 0.38-0.42 -
Tap Density (g⁄cm³) 0.56-0.60 0.56-0.60 0.62-0.68 0.8-0.85 0.56-0.60 0.58-0.62 -
Impurities(≤ ppm) Si 8 8 8 8 5 5 5.0
Fe 2.0 2.0 2.0 2.0 1.5 1.5 2.0
Na 1.0 1.0 1.0 1.0 1.0 1.0 1.0
K 1.0 1.0 1.0 1.0 1.0 1.0 1.0
Ca 1.0 1.0 1.0 1.0 1.0 1.0 1.0
Mg 1.0 1.0 1.0 1.0 1.0 1.0 1.0
Cu 1.5 1.5 1.5 1.5 1.5 1.5 2.0
La 0.1 0.1 0.1 0.1 0.1 0.1 1.0
Ce 0.1 0.1 0.1 0.1 0.1 0.1 1.0
*: Measure after dried at 80°C