Molecular formula: Al2O3, melting point: 2050 ℃
It has excellent thermal stability, high insulation, corrosion resistance and good light transmittance. Its crystal form (α, γ, etc.) can be adjusted according to application requirements, among which the α phase is particularly suitable for high temperature environments (melting point 2050℃). As a key functional material, high-purity alumina is widely used in LED sapphire substrates, lithium battery diaphragm coatings, semiconductor ceramics, high-end optical glass and biomedical ceramics. Its impurity characteristics such as low sodium and low iron are crucial to the performance of electronic devices. It is usually prepared by processes such as modified Bayer process or chemical vapor deposition (CVD).
Technical indicator:
|
Item |
|
|
|
|
|
Impurity content |
|||||||
|
k |
Na |
Ca |
Mg |
Fe |
Si |
Ti |
Cu |
||||||
|
4N-40B |
γ-AL2O3 |
99.995 |
30-40 |
70-100 |
0.60-0.70 |
1 |
25 |
1 |
1 |
1 |
15 |
1 |
1 |
|
4N-D3 |
γ-AL2O3 |
99.995 |
1-3 |
80-120 |
0.50-0.60 |
1 |
25 |
1 |
1 |
1 |
15 |
1 |
1 |
|
4N-40B |
α- AL2O3 |
99.995 |
30-40 |
≤5 |
0.70-0.80 |
1 |
25 |
1 |
1 |
1 |
15 |
1 |
1 |
|
4N-D3 |
α- AL2O3 |
99.995 |
3-5 |
≤10 |
0.60-0.70 |
1 |
25 |
1 |
1 |
1 |
15 |
1 |
1 |
|
4NA |
α- AL2O3 |
99.99 |
0.4-0.8* |
5-20 |
0.25-0.32 |
50 |
10 |
2 |
2 |
15 |
15 |
1 |
2 |
Storage:
●Avoid moisture, avoid scrolling, throw and sharp shocking during transportation, rainproof facilities should be readied..
●It should be stored in dry and ventilated warehouseto prevent contamination or moisture.
Package:
|
Type |
Plastic bag |
Super sack/Jumbo bag |
|
Powder |
25kg/55lb |
1000kg/ 2200 lb |
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