 |
Precious
corundum EK Micro |
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| Electrocorundum,
new product, white (acid-washed) |
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|
Top-rating product for highly
demanding applications in the abrasives and refractory industry
and as an iron-free fine blasting agent in the aluminium, optical
and dental sectors, grinding, lapping and polishing agent, ceramic
filters |
| Chemical
analysis (average) |
|
|
| Al2O3 |
|
min. |
99,5 % |
|
CaO + MgO |
|
|
0,07 % |
| TiO2 |
|
|
0,01 % |
|
Na2O |
|
|
0,18 % |
| SiO2 |
|
|
0,20 % |
|
Fe2O3 |
|
less than |
0,01 % |
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| Specific weight: |
|
4,00 g/cm³ |
| Hardness: |
|
Knoop 2100, Mohs 9 |
| Melting point: |
|
2040 °C |
| Grain shape: |
|
sharp-edged |
| Bulk weight |
|
0,9 - 1,8 g/cm³, depending
on grain size |
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| Grain sizes |
| Designation |
Grain
size distribution |
|
Surface
roughness |
| FEPA-No. |
ds3-value |
ds50-value |
ds94-value |
|
Glass |
Hardened |
| |
max (µm) |
mean
grain size |
min. (µm) |
|
(µm) |
steel
(µm) |
| F 230 |
85,2 |
50,0+/-3,0 |
34,4 |
|
|
|
| F 240 |
72,6 |
42,3+/-2,0 |
28,3 |
|
|
|
| F 280 |
61,1 |
34,5+/-1,5 |
22,1 |
|
|
|
| F 320 |
50,6 |
27,7+/-1,5 |
16,5 |
|
|
1,5 - 2,2 |
| F 360 |
41,1 |
21,6+/-1,5 |
11,9 |
|
7,0 - 8,0 |
0,5 - 1,5 |
| F 400 |
32,7 |
16,5+/-1,0 |
7,9 |
|
4,0 + 6,0 |
0,3 -1,5 |
| F 500 |
25,3 |
12,3+/-1,0 |
4,8 |
|
3,0 + 4,5 |
0,2 - 0,8 |
| F 600 |
19,3 |
9,0+/-1,0 |
2,8 |
|
1,0 - 2,0 |
0,1 - 0,6 |
| F 800 |
13,8 |
6,3+/-1,0 |
1,7 |
|
|
0,1 - 0,4 |
| F 1000 |
9,6 |
4,5+/-0,8 |
0,7 |
|
1,5 |
0,05 - 0,3 |
| F 1200 |
6,4 |
3,1+/-0,5 |
0,7 |
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Corundum is not dangerous to health.
Its use is not associated with a danger of silicosis. Corundum is
neither carcinogenic nor toxic. |
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25/50 kg paper bags, palletised on 1
t pallets and shrink wrapped. |
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