Abrasifs PA :
Les abrasifs PA sont de l’alumine Bayer, qui est fondue électriquement à haute température, et ajoutée avec la bonne quantité de chrome oxydé. Il est rose. Sa dureté est proche, mais sa ténacité est supérieure à celle de WA.
Composition chimique:
|
spécification |
Faible teneur en chrome | Chrome moyen | Haute teneur en chrome | ||||||
|
|
Al2O3
(%) |
Cr2O3
(%) |
Na2O
(%) |
Al2O3
(%) |
Cr2O3
(%) |
Na2O
(%) |
Al2O3
(%) |
Cr2O3
(%) |
Na2O
(%) |
| F12-F80 | ≥98,50 | 0,20-0,45 | ≤0,50 | ≥98,20 |
0,45-1,00 |
≤0,55 | ≥97,40 | 1h00-2h00 | ≤0,55 |
| F90-F150 | ≥98,50 |
|
≤0,50 | ≥98,20 |
|
≤0,60 | ≥97,00 |
|
≤0,60 |
| F180-F220 | ≥98,50 |
|
≤0,50 | ≥98,80 |
|
≤0,70 | ≥96,50 |
|
≤0,70 |
Propriété physique:
| Minéraux de base | Taille du cristal
µm |
Véritable densité
g/cm3 |
Densité apparente
g/cm3 |
Dureté des nœuds
kg/mm2 |
| α-Al2O3 | 600-2000 | ≥3,90 | 1.40-1.91 | 22h00-23h00 |
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