High Purity Alumina (HPA)

High Purity Alumina Series Products

High Purity Alumina

By virtue of its good chemical stability, melting point, mechanical strength,  hardness, thermal conductivity, insulation resistivity and other properties, high purity alumina can be used in many application fields: sapphire, ruby, engineering ceramics, ceramic substrate, spray material, photoelectric glass, semiconductor devices, insulators, electrical power devices, surface coating for cathode materials and more.

Specification Details
Typical Properties Units 4N5G-40B 4N5G-D2 (milled) 4N5A-40B 4N5A-D5 (milled)
Crystal Structure
γ
γ
α
α
Average Particle Size
(by Bettersize Laser 9300SE)
D50, um
35-45
1-3
35-45
3-5
Loose Bulk Density
g/cm3
0.55-0.65
0.30-0.40
0.70-0.80
0.50-0.60
BET Surface Area
m2/g
45-55
60-70
≤5
≤5
Purity (Al2O3) ≥
%
99.995
99.995
99.995
99.995
Impurity ≤ (by ICP-OES)
Na
ppm
30
30
30
30
Ca
ppm
1
1
1
1
Mg
ppm
1
1
1
1
Fe
ppm
1
1
1
1
Si
ppm
17
17
17
17
Ti
ppm
1
1
1
1
Cu
ppm
1
1
1
1
Packing
(As per customer’s requests)
drum
25kg
20kg
25kg
25kg