White Fused Alumina
Mirror polishing · >99% α-phase
Al₂O₃ 99.81% · Mohs hardness 9.0
BFA
Brown Fused Alumina
Bauxite and coke or anthracite smelted in an electric arc furnace. Tougher than silicon carbide, with small crystal size and impact resistance. Crushing yields clean, near-spherical grains that bond readily — the broad-application, cost-efficient abrasive.
Al₂O₃ 95.0–97.0%Microhardness HV 1800–2200Grit range F4 – F320Toughness Higher than SiC
Specification
Chemistry and physical properties
Typical production values. Batch certificates are issued against your own specification on request.
| Constituent | Value (%) |
|---|---|
| Al₂O₃ | 95 |
| TiO₂ | 3 |
| SiO₂ | 1.0 |
| Fe₂O₃ | 0.3 |
| Form | Range |
|---|---|
| Grit range | F4 – F320; custom sizing to customer specification |
| Property | Value |
|---|---|
| Main constituents | Al₂O₃ and TiO₂ with minor SiO₂ and Fe₂O₃ |
| Al₂O₃ content | 95.00–97.00% |
| Microhardness | HV 1800–2200 |
| Toughness | Higher than silicon carbide |
| Grain shape | Mostly spherical, clean surface, bonds readily |
| Common grits | F4 – F320, produced to international and national standards |
Applications
Where BFA is used
- Advanced refractories, castables and refractory bricks
- Environment-friendly sandblasting for aluminium and copper profiles, glass, washed denim and precision moulds
- Free lapping of CRTs, optical glass, monocrystalline silicon, lenses, watch glass, crystal glass and jade
- Resin-bonded abrasive tools and coated abrasives (sandpaper, abrasive cloth)
- Functional filler for brake components, special tyres and building products
- Wear layers for expressways, runways, docks, car parks, industrial floors and sports surfaces
- Filter media for drinking water and wastewater; non-ferrous ore dressing; drilling mud weighting
- Waterjet cutting media for pipelines and steel sections
Specimen
Brown Fused Alumina grain
Also available
Other material families
Green Silicon Carbide
Wafer slicing · GC800# – GC10000#
SiC ≥99.0% · Mohs hardness 9.5
Tabular Alumina
Scratch-free CMP · hexagonal platelets
Al₂O₃ 99.72% · Mohs hardness 9
Next step
Quote Brown Fused Alumina to your specification
Tell us the grading standard, particle size band, chemistry limits and monthly tonnage for your BFA requirement and we will confirm the closest grade or quote a custom one.
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