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Calcined α-alumina ultrafines are made by using industrial alumina as starting material and calcined at proper temperatures.
Refractory products incorporated with calcined α-alumina ultrafines exhibit enhanced mechanical strength, high hardness, high electric resistivity and good thermal conductivity. They can be widely used in ceramics for electronic ceramics, structural ceramics, refractories, abrasives, polishing materials, etc.
Calcined α-alumina ultrafines are made by using industrial alumina as starting material and calcined at proper temperatures.
Refractory products incorporated with calcined α-alumina ultrafines exhibit enhanced mechanical strength, high hardness, high electric resistivity and good thermal conductivity. They can be widely used in ceramics for electronic ceramics, structural ceramics, refractories, abrasives, polishing materials, etc.
|
Chemical Composition |
Unit |
DA30 |
DA50 |
General Type |
|
Al2O3 |
% |
≥99.5 |
≤99.4 |
|
|
Na2O |
% |
≤0.25 |
≤0.40 |
|
|
SiO2 |
% |
≤0.06 |
≤0.08 |
|
|
Fe2O3 |
% |
≤0.04 |
≤0.04 |
|
|
CaO |
% |
≤0.03 |
≤0.03 |
|
|
D50/Malvern |
μm |
3.0-5.0 |
5.0-7.0 |
4.0-6.0 |
|
BET |
m2/g |
0.5-2.0 |
0.5-2.0 |
0.5-2.0 |
|
Particle size distribution |
|
Monomodal |
Monomodal |
Monomodal |
Packing: 25kg bag/1000kg big bag / as per customer’s request
