Brown aluminum oxide polishing powder
Aluminium oxides are fast and effective for removing rust, mill scale, paint, carbon deposits. Aluminium oxide media will remove residues from your substrate twice the speed as sand, without all the health risks. Aluminum Oxide media is excellent for antiskid, antislip flooring coatings, and an additive for epoxy floor systems.
| Chemical & Physical Properties | ||||||
| Crystal Form | Alpha alumina trigonal system | |||||
| Chemical nature | Amphoteric | |||||
| Reaction with acids | Subject to mild attack by aqua and hydrofluoric acid | |||||
| Reaction with Alkalies | Very slight with strong hot solution only | |||||
| Oxidation-reduction effects | None | |||||
| True Density(g/cm3) | 3.97 | |||||
| Hardness | Knoop(kg/cm2) | 2000-2200 | ||||
| Moh’s | 9 | |||||
| Colour | Dark Brown | |||||
| Colour after firing | Light blue | |||||
| Melting point | 2000°C | |||||
| Max Usable temperature | 1900°C | |||||
| Specific heat (cal/g.°C) | 0.26(20-29°C) | |||||
| Coefficient of thermal conductivity | Room temperature | 900°C | ||||
| (cal/cm2.sec.°C) | 0.047 | 0.013 | ||||
| Electrical resistivity (Wcm) | 30°C | 300°C | 900°C | 1600°C | ||
| 1016 | 1013 | 105 | 104 | |||
| Coefficient of linear expansion (x10-6) | 7-9(0-1600°C) | |||||
| Grit No. | Micron | Grit No. | Micron | Grit No. | Micron |
| 10 | 2360 ~ 2000 | 30 | 710 ~ 600 | 80 | 212 ~ 180 |
| 12 | 2000 ~ 1700 | 36 | 600 ~ 500 | 90 | 180 ~ 150 |
| 14 | 1700 ~ 1400 | 40 | 500 ~ 425 | 100 | 150 ~ 125 |
| 16 | 1400 ~ 1180 | 46 | 425 ~ 355 | 120 | 125 ~ 106 |
| 20 | 1180 ~ 1000 | 54 | 355 ~ 300 | 150 | 106 ~ 75 |
| 22 | 1000 ~ 850 | 60 | 300 ~ 250 | 180 | 90 ~ 63 |
| 24 | 850 ~ 710 | 70 | 250 ~ 212 | 220 | 75 ~ 53 |
| Available micron powder sizes | ||||||||
| China GB 2477-83 | JIS | FEPA(84) / DIN(70) | ISO(77) | |||||
| Grit No. | Standard size range(µm) | Grit No. | ds50 value (µm) | Grit No. | ds50 value (µm) | Grit No. | ds50 value (µm) | |
| Standard werte der Mikro-F-Reihe | Serigraph 5000D | |||||||
| 240 | 60.0±4.0 | P240 | 58.5±2.0 | |||||
| 280 | 52.0±3.0 | P280 | 52.2±2.0 | |||||
| W63 | 63 – 50 | 320 | 46.0±2.5 | F230/53 | 53±3.0 | 50.0±3.0 | P320 | 46.2±1.5 |
| W50 | 50 – 40 | 360 | 40.0±2.0 | F240/45 | 44.5±2.0 | 42.0±2.0 | P360 | 40.5±1.5 |
| 400 | 34.0±2.0 | P400 | 35.0±1.5 | |||||
| W40 | 40 – 28 | 500 | 28.0±2.0 | F280/37 | 36.5±1.5 | 34.5±1.5 | P500 | 30.2±1.5 |
| 600 | 24.0±1.5 | F320/29 | 29.2±1.5 | 27.7±1.5 | P600 | 25.8±1.0 | ||
| W28 | 38 – 20 | 700 | 21.0±1.3 | F360/23 | 22.8±1.5 | 21.6±1.5 | P800 | 21.8±1.0 |
| 800 | 18.0±1.0 | F400/17 | 17.3±1.0 | 16.5±1.0 | P1000 | 18.3±1.0 | ||
| W20 | 20 – 14 | 1000 | 15.5±1.0 | F500/13 | 12.8±1.0 | 12.3±1.0 | P1200 | 15.3±1.0 |
| W14 | 14-10 | 1200 | 13.0±1.0 | |||||
| 1500 | 10.5±1.0 | F600/9 | 9.3±1.0 | 9.0±1.0 | ||||
| W10 | 10-7 | 2000 | 8.5±0.7 | |||||
| W7 | 7-5 | 2500 | 7.0±0.7 | F800/7 | 6.5±1.0 | 6.3±1.0 | ||
| W5 | 5 – 3.5 | 3000 | 5.7±0.5 | F1000/5 | 4.5±0.8 | 4.5±0.8 | ||
| F1200/3 | 3.1±0.5 | 3.1±0.5 | ||||||
| for general purposes | for general purposes | for bonded abrasives | for coated abrasives | |||||
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