Calcined α alumina is also called high-temperature alumina. It has a white fine granular appearance. It is shaped by high-temperature calcination of industrial aluminum hydroxide or alumina raw materials. It has a high melting point (2053°C), good thermal stability, low impurity content, and excellent eletricity insulation; stable crystal structure, acid and alkali corrosion resistance; high hardness (Mohs hardness 9), excellent characteristics such as wear resistance. So it is widely used in ceramics, refractory materials, grinding and polishing, petrochemical industries and other industries.
Specification
item |
impurity content≤(%) |
ΑL2O3≥(%) |
LOI≤ |
α- ΑL2O3 ≥(%) |
True Density≥(g/cm3) |
|
Nα2O |
SiO2 |
Fe2O3 |
|
|
|
|
AT-A |
0.2 |
0.03 |
0.02 |
99.5 |
0.10 |
94 |
3.94 |
AT-A |
0.3 |
0.04 |
0.03 |
99.3 |
0.10 |
93 |
3.93 |
Particle Size (D50μm): it can be adjusted appropriately according to your needs |
FAQ
Q: Are you factory?
A: Yes, we are factory.
Q: How is your quality?
A: We have top grade production equipment and precision measuring instruments and we also have engineers and technicians carry out quality control.
Q: Can you supply free samples?
A: 1kgs free sample is available, but freight charges will be at your account, The charges will be return to you or deduct from your order in the future.
Q: What about the payment?
100% T/T in advance, 30% T/T in advance, the balance 70% against the B/L copy, Irrevocable L/C at sight
Q: The MOQ is?
A: MOQ is usually 1 ton, special products can be coordinuted with each other.
Q: Can I visit your factory?
A: Yes, we welcome you to visit our factory at anytime
Q: How about your delivery time?
A: Usually the shipment is within 15 days after confirming receipt of your payment, some products maybe need longer time.