Ceramic coated Brown aluminum oxide abrasive grain
Ceramic coated calcined brown aluminum oxide and Ceramic coated blue fired aluminum oxide are both Ceramic coated Brown fused alumina abrasive grains. They are processed from tilting furnace brown aluminum oxide as raw material. The calcination process can reduce the impurity content and dust of brown aluminum oxide. It can also perform high-temperature shaping on the cracks generated during the crushing process of BFA. The ceramic coating process can improve the toughness, hydrophilicity, and surface roughness of abrasive particles, increase the holding force of binders on abrasive particles. As a result, it improves cutting efficiency and applicability time after making grinding wheel products.
Ceramic coated Brown aluminum oxide abrasive grain Features:
- High mechanical strength,hardness.
- Excellent hydrophilicity,
- Higher toughness, and high strength than normal brown fused alumina
- High fracture resistance, impact resistance.
Physical and Chemical Composition
Physical Properties | |
Knoop Hardness | 1990-2290 |
Hardness: Mohs | Min 9.0 |
Specific Gravity | Min 3.95g/cm3 |
Bulk Density | 1.55-2.05g/cm3 |
Melting Point | 2250℃ |
Hydrophilicity | 238mm (F46) |
Toughness | 65% (F24) |
Particle Shape | Cubic |
Color | Brown & Red |
Typical Chemical compositions[%] | |
Al2O3 | ≥ 95% |
SiO2 | ≤1.0% |
TiO2 | 2-3% |
Fe2O3 | ≤0.4% |
CaO | ≤0.3% |
Magnetic Content | ≤0.1% |
Ceramic coated Brown aluminum oxide abrasive grain Applications
Bonded abrasive wheels such as resin bonded cutting wheel, heavy duty grinding wheel, vitrified grinding wheel,etc. (F-grit)
Coated abrasive tool such as sanding blet, fiber polishing wheel, etc.(P-grit)
Grinding and polishing media.
Typical Size for F-grit and P-grit
Grit designation | Mean diameter in um | Bulk Density(LPD) in g/cm3 |
F12 | 1765 | 1.93-2.03 |
F14 | 1470 | 1.92-2.02 |
F16 | 1230 | 1.91-2.01 |
F20 | 1040 | 1.91-2.01 |
F22 | 885 | 1.89-1.99 |
F24 | 745 | 1.87-1.97 |
F30 | 625 | 1.83-1.93 |
F36 | 525 | 1.80-1.90 |
F40 | 438 | 1.78-1.88 |
F46 | 370 | 1.76-1.86 |
F54 | 310 | 1.74-1.84 |
F60 | 260 | 1.72-1.82 |
F70 | 218 | 1.70-1.80 |
F80 | 185 | 1.68-1.78 |
F90 | 154 | 1.65-1.75 |
F100 | 129 | 1.62-1.72 |
F120 | 109 | 1.60-1.70 |
F150 | 82 | 1.57-1.67 |
F180 | 69 | 1.54-1.64 |
F220 | 58 | 1.52-1.62 |
P12 | 1815 | 1.93-2.03 |
P16 | 1324 | 1.91-2.01 |
P20 | 1000 | 1.89-1.99 |
P24 | 764 | 1.87-1.97 |
P30 | 642 | 1.84-1.94 |
P36 | 538 | 1.82-1.92 |
P40 | 425 | 1.79-1.89 |
P50 | 336 | 1.76-1.86 |
P60 | 269 | 1.74-1.84 |
P80 | 201 | 1.70-1.80 |
P100 | 162 | 1.66-1.76 |
P120 | 125 | 1.63-1.73 |
P150 | 100 | 1.60-1.70 |
P180 | 82 | 1.57-1.67 |
P220 | 68 | 1.54-1.64 |